Last updated: August 21, 2025
In Narita, Japan, January ushers in a chilly atmosphere characterized by a maximum temperature of 17°C (64°F) and an average temperature hovering around 5°C (42°F). The month can dip to a brisk minimum of -6°C (21°F), emphasizing the winter's grip. With precipitation totaling 52 mm (2.1 in) over the course of six days, residents and visitors alike can expect occasional showers amidst the cool, damp air. Humidity levels rest at 70%, contributing to the overall crispness of the season. Embrace the unique blend of cold temperatures and intermittent rain, making January a truly memorable time to experience Narita's winter charm.
In Narita, Japan, January brings a chill that marks the peak of winter with temperatures often dipping as low as -6°C (21°F). The average temperature hovers around a brisk 5°C (42°F), fitting for cozy indoor activities or warm cups of tea. While daytime highs can reach a pleasant 17°C (64°F), the cold nights remind residents and visitors alike of the season's bite. As February rolls in, the mercury starts to rise slightly, signaling a gentle transition towards spring, with milder temperatures and slightly warmer averages. This shift hints at the gradual warming trend, leading into the more temperate spring months ahead, where temperatures steadily climb toward the comforts of early summer.
In January, Narita experiences a relatively mild start to the year, with precipitation amounts totaling 52 mm (2.1 in) over about six rainy days. This sets a tone of moderate moisture as the city transitions from the cooler, drier months to the wetter spring season ahead. Notably, January's precipitation is higher than February's, which sees a decrease to 46 mm (1.8 in) despite having more rainy days at eight. The subsequent months show a marked increase in rainfall, particularly from March onward, where amounts surge to 136 mm (5.4 in), hinting at the arrival of Japan's early spring rains. This trend continues through the spring and into summer, with July reaching a peak of 223 mm (8.8 in), marking it as the wettest month of the year. Overall, January serves as a transition period, indicating the gradual buildup of precipitation that characterizes Narita's seasonal weather patterns.
In January, Narita, Japan, experiences a humidity level of 70%, setting the stage for a cool and somewhat crisp winter atmosphere. As the months progress into February and March, humidity gradually decreases, dropping to 69% and 68%, respectively, providing a bit of relief from the colder, damp air. However, as spring arrives in April, humidity rises again to 73%, signaling the onset of a wetter climate that continues to climb, reaching a peak of 94% in the sweltering heat of July. The summer months are characterized by high humidity levels, with August and September remaining notably humid at 87% and 83%. As the year winds down, there’s a slight decrease in humidity, dropping to 72% by December. This cyclical trend showcases Narita's transition from the cool, moist conditions of winter to the intense humidity of summer, ultimately returning to a more temperate state in the latter part of the year.
In January, Narita, Japan, experiences a moderate UV Index of 3, indicating a burn time of 30 minutes for unprotected skin. As the months progress, the UV exposure starts to escalate, with February seeing a rise to 5, while March jumps significantly to a very high index of 8, where the burn time decreases to just 15 minutes. This trend continues into April with a peak at 9, and by May, the UV Index reaches an extreme level of 11, reducing acceptable exposure to just 10 minutes. The intense UV levels persist through the summer months of June, July, and August, before tapering off slightly in September to 9. The UV Index then gradually declines to 7 in October, before settling back to moderate levels of 5 in November and 4 in December. For more detailed insights on UV exposure in Narita throughout the year, visit Narita UV Index.
UV Risk Categories
In Narita, Japan, January welcomes the year with 187 hours of sunshine, marking the beginning of a gradual upward trend that sees the days becoming brighter as winter transitions to spring. By February, sunshine increases to 229 hours, and this promising rise continues through March and April, where the hours reach 255 and 276, respectively. As May blossoms, the sunshine peaks at 288 hours, embodying the vibrant spirit of spring. The warmth of June and July maintains a consistent shine with 268 and 263 hours, while August breaks records with a remarkable 302 hours, celebrating the height of summer. As the days start to shorten, September offers 245 hours, then a decline brings October down to 211 hours, followed by November and December with 224 and 221 hours respectively, showcasing a gentle waning as the year closes. This cyclical pattern not only highlights the dynamic seasonal changes in Narita but also paints a vivid picture of the evolving landscape of sunshine throughout the year.
In Narita, Japan, the likelihood of sunny weather in January hovers at a moderate 53%, striking a balance between the sunnier months of February and November, which boast chances of 65% and 58% respectively. As winter deepens, the chance of sun tends to fluctuate, with January showing resilience against the lower probabilities that follow in the spring and summer months. Notably, March and April dip to 40% and 48%, while May and June experience even lower prospects of sun, at just 22% and 24%. Thus, January serves as a bridge between the brighter days of winter and the cloudier uncertainties of the coming seasons, providing a refreshing opportunity for some delightful sunshine before spring’s arrival.
In January, Narita, Japan, enjoys a modest 10 hours of daylight, a condition that remains stable through February. As spring approaches, daylight duration begins to increase, reaching 11 hours in March and expanding significantly to 13 hours by April. The heights of late spring and early summer, particularly in May and June, bring 14 hours of daylight, providing long, sun-soaked days perfect for outdoor activities. As summer transitions into autumn, daylight gradually diminishes, tapering to 13 hours in August and continuing downwards to 12 hours in September. By October, the days shrink further to 11 hours, before settling back to 10 hours in November and finally 9 hours in December. This rhythmic ebb and flow of daylight not only marks the changing seasons but also invites residents and visitors alike to embrace the varied experiences each month has to offer.
In January, Narita experiences a gentle breeze with an average wind speed of 3.2 m/s (7 mph), setting a calm yet refreshing tone for the start of the year. As the seasons progress, February and March see a slight uptick, maintaining a consistent wind speed of 3.5 m/s (8 mph), which adds a touch of vitality to the cool winter air. Transitioning into April and May, the winds pick up slightly, reaching 3.8 m/s (9 mph) and 4.0 m/s (9 mph), indicating the arrival of spring and the awakening of nature. However, this trend shifts in the summer months of June and July, where the winds soften to around 2.6 m/s to 2.9 m/s (6 mph), suggesting a more tranquil atmosphere. As we head into autumn, winds return to a moderate pace, with speeds ranging from 2.8 m/s in November to 3.4 m/s in October, encapsulating the steady rhythm of change in Narita's climate. Through these fluctuations, January remains a serene month, inviting reflection amidst the gentle winds.
Weather in Narita varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Narita, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between January and February, January typically experiences colder temperatures, with a minimum of -6°C (21°F) and an average of 5°C (42°F), while February sees a slight increase with a minimum of -3°C (28°F) and an average of 6°C (44°F). The maximum temperatures also rise, peaking at 17°C (64°F) in January and reaching 20°C (68°F) in February. Precipitation is slightly lower in February, with 46 mm (1.8 in) over 8 days compared to January's 52 mm (2.1 in) spread over 6 days, indicating a trend towards more humid but less intense precipitation. Overall, both months are characterized by relatively high humidity around 70%. For more detailed information about February's weather, you can visit Narita weather in February.
In January, the weather tends to be quite cold, with temperatures ranging from a minimum of -6°C (21°F) to a maximum of 17°C (64°F) and an average of around 5°C (42°F). There are about 6 days of precipitation totaling 52 mm (2.1 in), accompanied by a humidity level of 70%. In contrast, March brings a noticeable warming trend, with temperatures ranging from -1°C (31°F) to 23°C (74°F) and an average of 10°C (51°F). However, March also sees an increase in precipitation, with 136 mm (5.4 in) spread over 13 days, while humidity remains slightly lower at 68%. For a closer look at what to expect during this month, you can check Narita weather in March.
January typically presents a chilly climate with temperatures ranging from a minimum of -6°C (21°F) to a maximum of 17°C (64°F), while April experiences a significant warming trend with temperatures varying from a minimum of 2°C (36°F) and peaking at 27°C (81°F). Precipitation is more frequent in April, totaling 116 mm (4.6 in) over 11 days compared to January's 52 mm (2.1 in) over just 6 days. Both months have relatively high humidity, with January at 70% and April slightly higher at 73%. For a detailed look at the weather conditions in April, visit Narita weather in April.
In January, the weather is quite brisk, featuring temperatures that range from a chilly -6°C (21°F) at the lowest to a relatively mild 17°C (64°F) at its peak. Precipitation is moderate, with about 52 mm (2.1 in) falling over six days, and humidity levels hover around 70%. In stark contrast, May brings a much warmer climate, with minimum temperatures of 8°C (47°F), averaging 19°C (67°F), and soaring to a maximum of 32°C (90°F). Rainfall also increases, totaling 128 mm (5.0 in) over 12 days, coupled with higher humidity at 81%. For a more detailed look at the warmth and conditions of May, you can check Narita weather in May.
In January, the weather is characterized by cooler temperatures, with a minimum of -6°C (21°F) and an average of 5°C (42°F), while maximum temperatures can reach up to 17°C (64°F). Precipitation is relatively low at 52 mm (2.1 in) over about 6 days, and humidity hovers around 70%. In contrast, June experiences significantly warmer weather, with minimum temperatures starting at 15°C (60°F) and averaging 22°C (72°F), peaking at a high of 33°C (91°F). This month also brings increased rainfall, totaling 161 mm (6.3 in) across approximately 13 days, along with higher humidity levels of 88%. For more details, check out Narita weather in June.
The weather in January is characterized by chilly temperatures, with averages around 5°C (42°F) and a maximum of 17°C (64°F), while July brings much warmer conditions with average temperatures of 26°C (79°F) and highs reaching up to 36°C (98°F). January sees only 52 mm (2.1 in) of precipitation over about 6 days, resulting in relatively dry conditions, whereas July experiences significantly more rain, totaling 223 mm (8.8 in) over 17 days, accompanied by higher humidity levels at 94%. This stark contrast highlights the transition from the crisp, cool winter of January to the warm, humid summer of July in the region. For more detailed information, check out Narita weather in July.
In January, the weather is quite cold, with minimum temperatures dipping to -6°C (21°F) and an average of 5°C (42°F). Precipitation is relatively low at 52 mm (2.1 in), falling over about 6 days, while humidity hovers around 70%. Conversely, August brings a stark contrast, with minimum temperatures starting at a warm 18°C (64°F) and averaging 28°C (82°F), peaking at a scorching 36°C (97°F). The month experiences more rainfall, totaling 102 mm (4.0 in) across approximately 14 days and higher humidity at 87%. For a detailed look at the August conditions in this region, check out Narita weather in August.
When comparing January and September weather, the differences are striking. January features colder temperatures, with a minimum of -6°C (21°F) and an average of 5°C (42°F), while September enjoys much milder conditions, with temperatures ranging from a minimum of 14°C (58°F) to an average of 24°C (75°F). Additionally, September sees significantly more precipitation, totaling 186 mm (7.3 in) over 17 days compared to January's 52 mm (2.1 in) over just 6 days. Humidity levels also rise in September, reaching 83% compared to January's 70%. For more specific insights on September weather, you can visit Narita weather in September.
January and October present strikingly different weather patterns. In January, temperatures typically range from a minimum of -6°C (21°F) to a maximum of 17°C (64°F), with an average of 5°C (42°F). The month sees around 52 mm (2.1 in) of precipitation spread across about 6 days, and humidity hovers at 70%. In stark contrast, October experiences milder temperatures, with a minimum of 9°C (48°F), an average of 19°C (66°F), and a peak reaching 31°C (88°F). Precipitation significantly increases to 254 mm (10.0 in) over approximately 14 days, with humidity climbing to 78%. For more specifics on October weather in this region, you can check Narita weather in October.
In comparing January and November weather, one can observe notable differences in temperature and precipitation patterns. January typically experiences colder conditions, with minimum temperatures plummeting to -6°C (21°F) and an average of 5°C (42°F), while November enjoys milder temperatures, with a minimum of 3°C (37°F) and an average of 14°C (57°F). Furthermore, November sees more precipitation, totaling 101 mm (4.0 in) over 10 days, compared to January's 52 mm (2.1 in) over just 6 days. Humidity is slightly higher in November at 74%, compared to 70% in January, further enhancing the sense of dampness. For a more detailed look at November weather, you can view Narita weather in November.
In December, the weather is generally milder compared to January, with average temperatures ranging from a minimum of -3°C (27°F) to a maximum of 21°C (71°F), while January experiences a broader range with minimums of -6°C (21°F) and maximums reaching 17°C (64°F). December also sees slightly more precipitation, totaling 71 mm (2.8 in) over 8 days, compared to January’s 52 mm (2.1 in) over 6 days. Humidity levels remain relatively consistent, with December at 72% and January slightly lower at 70%. For more detailed information on weather conditions in December, you can check Narita weather in December.
In January, Narita experiences a distinct chill compared to the milder months that precede it. With temperatures dipping to a refreshing low, this month stands out for its crisp air and increased humidity, which can make even the mildest of winter days feel brisk. The occasional rainfall contributes to the total precipitation, adding to the unique charm of winter in this region. If you're planning a visit, be prepared for not just the cold, but also the serene beauty that January brings, making it a truly special time to explore the area. For a deeper understanding of what to expect, check out Narita Climate.