January Weather in Fukushima, Japan

Last updated: August 21, 2025

In January, Fukushima, Japan, experiences a chilly winter with a maximum temperature reaching only 9°C (49°F), while the average temperature hovers around 0°C (32°F) and dips to a minimum of -8°C (18°F). With an average humidity level of 79%, the air often feels crisp and damp. This month sees significant precipitation totaling 128 mm (5.0 in) over approximately 20 days, contributing to the region's wintry ambiance and lush landscapes. Visitors and residents alike should prepare for a moisture-laden climate that emphasizes the beauty and challenges of winter in Fukushima.

January Temperature in Fukushima

In Fukushima, Japan, January ushers in the coldest temperatures of the year, with minimums plunging to around -8°C (18°F) and an average hovering right at freezing (0°C or 32°F). The crisp winter air only occasionally warms, reaching a maximum of 9°C (49°F). This chilly trend carries into February, where the mercury dips even lower, with a minimum of -9°C (17°F), while the rest of the month maintains a consistent average. As March rolls in, a noticeable shift occurs; temperatures begin to slightly rise, with a minimum of -4°C (25°F) and an average creeping up to 4°C (39°F), hinting at the impending arrival of spring. The gradual warmth continues through the spring months, ultimately leading to the vibrant, mild climate that characterizes Fukushima’s late spring and summer.

January Weather in Fukushima: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Fukushima, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fukushima, January typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec323239455359687268594736
Data source: Temperature data for Fukushima generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Fukushima

In Fukushima, Japan, January typically welcomes a substantial precipitation amount, averaging 128 mm (5.0 in) over the month. This rainfall occurs on approximately 20 days, setting a foundation for the wet winter season. Following January, February sees a slight increase in both precipitation, to 134 mm (5.3 in), and the number of rainy days, reaching 22. Notably, the wettest months materialize later in the year, with December peaking at 207 mm (8.2 in) over 27 days. Throughout the year, there's a clear trend of increasing rainfall leading into the summer months, while winter remains consistently damp, ensuring that Fukushima's lush landscapes thrive.

January Precipitation Trends in Fukushima

The chart displays monthly precipitation patterns in Fukushima, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Fukushima, January typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec128134105103118128120193150162164207
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

January Humidity in Fukushima

In January, Fukushima, Japan experiences a relatively high humidity level of 79%, setting the tone for a winter that is marked by a steady drop in moisture. As the months progress, February and March maintain similar humidity levels at 78% and 77%, respectively, creating a slightly drier atmosphere compared to the peak summer months. However, starting in April, humidity begins to rise again, reaching 86% by May, and skyrocketing to a sweltering 97% in August. This trend highlights a distinct seasonal shift, where the warm summer months dominate with high humidity, while the fall and winter see a gradual decrease, returning to 78% in November and 77% in December. Overall, the humidity levels in Fukushima illustrate a clear seasonal pattern, oscillating between drier and more humid spells throughout the year.

January Average Humidity in Fukushima

This chart illustrates the average monthly humidity levels in Fukushima, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Fukushima is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%78%77%78%86%91%95%97%89%82%78%77%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Fukushima

In January, Fukushima's UV Index stands at 3, indicating a moderate exposure level with a burn time of 30 minutes. This moderate trend continues into February with an increase in the UV Index to 4, maintaining the same burn time. As the seasons shift into spring, March sees a further rise to 5, yet the burn time remains consistent. By April, the UV Index catapults to 8, categorized as very high, dramatically shortening the burn time to 15 minutes. This intensity peaks in May and June, when the index reaches 9 and 10, respectively, emphasizing the need for sun protection. As summer progresses into July and August, the UV levels stay high, with August recording an extreme UV Index of 11, demanding vigilant sun safety as the burn time dips to just 10 minutes. Following this peak, September sees a decrease back to 8, yet the risk remains in the very high category. As the year closes, October falls to a 6 and November returns to a more moderate 3, while December offers reprieve at a low 2. These trends underscore the importance of being aware of UV index fluctuations throughout the year in Fukushima. For more details, visit Fukushima UV Index.

Maximum UV Index Levels in Fukushima for January

The chart shows the monthly maximum UV Index (UVI) for Fukushima in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Fukushima typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec345891010118632
Data source: Fukushima January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

January Sunshine in Fukushima

January marks the beginning of a gradual transition into brighter days in Fukushima, Japan, with 152 hours of sunshine. As winter wanes, the month of February sees a noticeable increase to 198 hours, hinting at the approaching spring. March and April continue this upward trend, reaching 259 and 282 hours respectively, as the region blooms and welcomes warmer weather. By May, sunny hours peak at 305, providing an inviting backdrop for outdoor activities. Even during the summer months of June and July, sunshine remains generous, maintaining at 297 and 305 hours. However, as the year progresses into late summer and fall, we see a soft decline, with August at 284 hours and September at 266 hours. This decrease continues into October, November, and December, where the sunshine dips to 232, 190, and 177 hours respectively, signaling the approach of winter. Overall, Fukushima experiences a vibrant peak of light during the spring and summer, creating a rhythmic ebb and flow of sunshine that enhances the beauty of each season.

Monthly Sunshine Duration in Fukushima: January Highlighted

The January sunshine duration represents the total number of hours Fukushima experiences direct sunlight during the month of January, excluding cloudy or obstructed periods. This chart compares the sunshine duration of January with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec152h198h259h282h305h297h305h284h266h232h190h177h
Data source: Fukushima January Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Fukushima During January

In January, Fukushima sees a 23% chance of sunny weather, setting the stage for a month characterized more by overcast skies than bright sunshine. As winter gives way to early spring, the likelihood of sunshine gradually increases, with February and March showing 27% and 29% chances, respectively. This steady climb hints at a turning point, with April experiencing a notable leap to 47%, where sunnier days become a welcome contrast to the previous months. The upward trajectory continues into late spring and summer, averaging around 36% from June to July, highlighting a shift towards more favorable weather. Thus, while January may not be the sunniest month, it marks the beginning of a slow transition into brighter days ahead.

Percentage of Sunny Days in January in Fukushima

The chart illustrates the percentage of sunny days in Fukushima throughout the year, with January highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Fukushima experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec23%27%29%47%32%36%36%27%43%39%35%24%
Data source: Fukushima January chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Fukushima in January

In Fukushima, Japan, the evolution of daylight throughout January marks the beginning of a gradual increase, with 9 hours of daylight illuminating the landscape. As the season transitions into February, an additional hour invites more sunlight, hinting at the approaching warmth of spring. By March, the days continue to lengthen, reaching 11 hours, a clear precursor to the vibrant months ahead. April heralds a delightful surge, with daylight extending to 13 hours, followed by 14 hours in May, making this time perfect for outdoor exploration. The peak of summer in June graces residents with a full 15 hours of daylight, before gradually tapering off in July and August. As autumn draws near, daylight hours diminish steadily, falling back to 12 hours in September and 11 hours by October. November and December then usher in the shortest days of the year, with daylight returning to 9 hours, thus completing the cycle. This rhythm not only paints a vivid picture of seasonal change but also highlights the natural ebb and flow of light that characterizes life in Fukushima.

Average Daylight Hours in Fukushima for January

The chart illustrates the variation in daylight duration in Fukushima throughout the year, with January highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 32m10h 35m11h 56m13h 19m14h 30m15h 6m14h 48m13h 46m12h 26m11h 3m9h 51m9h 12m
Data source: Fukushima daylight hours, calculated by summing the hours between sunrise and sunset for each day.

January Winds in Fukushima

In January, the winds in Fukushima, Japan, blow with an average speed of 9.1 m/s (20 mph), making it a brisk start to the year. As the month transitions into February, winds pick up slightly, reaching 9.7 m/s (22 mph), reflecting a seasonal uptick that often heralds the approaching spring. However, by March, the winds begin to ease, dropping to 7.5 m/s (17 mph) as the region experiences more temperate weather. This trend continues through the spring months, with April and May seeing calm winds of 6.4 m/s (14 mph) and 5.8 m/s (13 mph), creating a serene atmosphere. As summer approaches, the winds maintain a gentle character, only rising slightly to 6.6 m/s (15 mph) in August. The year transitions back into brisk winds by November, echoing the January gusts before returning to 8.9 m/s (20 mph) in December, highlighting a pattern of fluctuating but generally calming wind speeds throughout the year in this picturesque region.

Average January Wind Speed in Fukushima

The chart displays monthly wind speed patterns in Fukushima, with values for each month shown alongside January's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how January's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec9.1 m/s9.77.56.45.85.55.96.65.76.27.98.9
Data source: Fukushima January wind data, generated using information from the Copernicus Climate Change Service.

How January Weather in Fukushima Compares to Other Months

Weather in Fukushima varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Fukushima, focusing on differences in temperature, rainfall, humidity, and UV levels.

January and February display quite similar weather patterns, with average temperatures hovering around freezing. In January, temperatures range from a minimum of -8°C (18°F) to a maximum of 9°C (49°F), accompanied by 128 mm (5.0 in) of precipitation over 20 days and an average humidity of 79%. February shows only a slight dip in the minimum temperature to -9°C (17°F) and maintains a similar maximum temperature of 9°C (48°F). However, it experiences slightly higher precipitation at 134 mm (5.3 in) across 22 days, with humidity remaining relatively stable at 78%. Overall, both months present cold and wet conditions, typical of winter in the region. For a detailed look at February weather specifics, check Fukushima weather in February.

January and March exhibit notable differences in weather patterns. January is characterized by colder temperatures, with a minimum of -8°C (18°F) and an average of 0°C (32°F), while March sees a slight warming trend, with a minimum of -4°C (25°F) and an average of 4°C (39°F). Precipitation levels are also different; January experiences 128 mm (5.0 in) over 20 days, compared to March's 105 mm (4.1 in) over 15 days. Additionally, January's humidity is slightly higher at 79%, compared to March's 77%. For a closer look at what to expect in March, check out Fukushima weather in March.

January and April present distinct weather contrasts. In January, temperatures drop significantly, with a minimum of -8°C (18°F) and an average hovering around 0°C (32°F), while reaching a maximum of just 9°C (49°F). This month is also characterized by higher precipitation, totaling 128 mm (5.0 in) across 20 days, contributing to a chilly and damp atmosphere with a humidity level of 79%. Conversely, April sees a noticeable warming trend, with minimum temperatures rising to 1°C (35°F) and average temperatures increasing to 7°C (46°F), peaking at 14°C (57°F). Precipitation decreases slightly to 103 mm (4.1 in) over 14 days, while humidity remains comparable at 78%. For a more detailed look at April weather, you can visit Fukushima weather in April.

January and May present starkly contrasting weather conditions. In January, temperatures range from a chilling -8°C (18°F) to a brisk 9°C (49°F), with an average of around 0°C (32°F), accompanied by significant precipitation of 128 mm (5.0 in) over 20 days, and a humidity level of 79%. In contrast, May brings a much milder experience, with temperatures ranging from a comfortable 6°C (44°F) to a pleasant 18°C (65°F), averaging 12°C (53°F). Precipitation decreases slightly to 118 mm (4.6 in) over just 12 days, while humidity rises to 86%. For more detailed information, you can check Fukushima weather in May.

In January, the weather is notably cold, with temperatures ranging from a chilly -8°C (18°F) at night to a maximum of 9°C (49°F) during the day, resulting in an average temperature of around 0°C (32°F). The month is characterized by high humidity at 79% and considerable precipitation, with rain or snow falling on approximately 20 days and total precipitation reaching 128 mm (5.0 in).

In contrast, June brings a warm and mild climate, with temperatures starting at a minimum of 10°C (51°F) and peaking at 21°C (69°F), leading to an average of 15°C (60°F). Although total precipitation remains the same at 128 mm (5.0 in), it falls over only 11 days, reflecting a more favorable and drier pattern compared to January. Additionally, the humidity increases slightly to 91%, contributing to the lush greenery typical of the summer months. For more specific details about June weather, you can check Fukushima weather in June.

In January, the weather is characterized by cold temperatures, with a minimum of -8°C (18°F) and an average of 0°C (32°F), while the maximum reaches only 9°C (49°F). This chill is accompanied by significant precipitation, totaling 128 mm (5.0 in) over about 20 days, and a relative humidity of 79%. In contrast, July brings a much warmer climate, where temperatures range from a minimum of 14°C (57°F) to an average of 20°C (68°F), peaking at 26°C (79°F). The precipitation is slightly lower at 120 mm (4.7 in), occurring over just 10 days, but the humidity rises to a notable 95%. Overall, January presents a starkly colder and wetter experience compared to the warm, humid conditions of July. For more details, check out Fukushima weather in July.

January and August present stark contrasts in weather. In January, temperatures range from a frigid -8°C (18°F) at their lowest to a modest 9°C (49°F) at their peak, with an average of around 0°C (32°F). The month experiences significant precipitation, totaling 128 mm (5.0 in) over 20 days, along with high humidity levels at 79%. In contrast, August brings much warmer weather, with minimum temperatures of 17°C (62°F) and maximums reaching 27°C (81°F), averaging around 22°C (72°F). While it has more total precipitation at 193 mm (7.6 in), it falls over fewer days (14), and humidity soars to 97%, creating a muggy environment. For more detailed insights, check out Fukushima weather in August.

In January, temperatures in Fukushima can drop as low as -8°C (18°F), with an average of 0°C (32°F) and highs reaching 9°C (49°F). The month typically sees about 128 mm (5.0 in) of precipitation over 20 days, coupled with a humidity level of 79%. In contrast, September experiences much milder weather, with minimum temperatures of 14°C (58°F) and average highs of 28°C (82°F), bringing an average of 20°C (69°F). Although September has a slightly higher total precipitation of 150 mm (5.9 in) over just 12 days, the humidity also increases to 89%. For more detailed information, check out Fukushima weather in September.

January and October present striking contrasts in weather. In January, temperatures can plummet to a minimum of -8°C (18°F) and average around 0°C (32°F), while October enjoys much milder conditions with a minimum of 7°C (44°F) and an average of 15°C (59°F). Precipitation is also noteworthy, with January experiencing 128 mm (5.0 in) over 20 days, compared to October’s 162 mm (6.4 in) spread across 15 days. Both months exhibit high humidity levels, with January at 79% and October slightly higher at 81%. For more details on October weather, you can refer to this link: Fukushima weather in October.

In January, the weather is quite frigid, with average temperatures hovering around 0°C (32°F) and lows dropping to -8°C (18°F). The month sees about 128 mm (5.0 in) of precipitation over 20 days, contributing to a chilly and humid atmosphere with humidity levels at 79%. In contrast, November experiences milder conditions, with average temperatures reaching 9°C (48°F) and daytime highs of up to 17°C (63°F). Although November has slightly more precipitation at 164 mm (6.5 in) spread over 19 days, the humidity remains close at 78%. For a detailed look at how November weather can vary, check out Fukushima weather in November.

January typically features colder temperatures compared to December, with January's average hovering around 0°C (32°F) and reaching a maximum of 9°C (49°F), while December sees slightly milder conditions, with averages around 2°C (36°F) and a peak of 14°C (57°F). Precipitation is also more frequent in December, occurring on 27 days and accumulating to 207 mm (8.2 in), compared to 128 mm (5.0 in) over 20 days in January. Interestingly, both months have similar humidity levels, with January at 79% and December at 77%. For a more detailed look at the conditions, check out this link: Fukushima weather in December.

Compare Fukushima's Climate with Cities Worldwide

Conclusion: What to Expect From January Weather in Fukushima

January in Fukushima stands out with its chilly temperatures and notable precipitation, marking a stark contrast to the milder months of the year. As the coldest month, it presents a unique blend of frosty air and persistent humidity, resulting in a landscape often cloaked in a wintery mist. With significant rainfall over many days, January's weather can feel quite raw, compelling visitors to bundle up and experience the serene beauty of winter in this region. For a deeper understanding of how these atmospheric conditions shape the seasons in Fukushima, explore more at Fukushima Climate.