Last updated: August 21, 2025
January in Suwa, Japan presents a captivating winter experience characterized by temperatures ranging from a brisk maximum of 12°C (53°F) to a chilling minimum of -18°C (0°F), with an average hovering around -2°C (29°F). This month witnesses an average precipitation of 75 mm (3.0 in) over approximately 12 days, contributing to a notably moist atmosphere with humidity levels at 76%. Visitors are greeted by a blend of frosty air and occasional snowfall, making January an intriguing time to explore the winter landscape of Suwa.
In January, temperatures in Suwa, Japan, can be quite dramatic, with a chilly minimum of -18°C (0°F) that sets the tone for the month. On average, the mercury hovers around -2°C (29°F), while daytime highs reach a crisp 12°C (53°F). This cold start marks the peak of winter, transitioning gradually to milder conditions as February approaches, where temperatures slightly improve, yet still remain cold, with highs of 15°C (60°F). As spring draws near in March, residents enjoy a noticeable rise in warmth, with average temperatures soaring to 4°C (40°F) and highs reaching 20°C (68°F). These trends emphasize a significant shift from the frigid depths of winter to the more temperate beginnings of spring, stunningly contrasting with the initial harshness of January's cold.
In January, Suwa, Japan experiences a moderate precipitation of 75 mm (3.0 in) spread over 12 days, setting a trend of relatively dry winter conditions compared to the upcoming months. This amount slightly increases to 80 mm (3.2 in) in February, indicating a gradual shift towards wetter weather. As the seasons transition into spring, precipitation rapidly climbs, with March and April bringing 141 mm (5.6 in) and 143 mm (5.6 in) respectively. This trend continues through May, where 155 mm (6.1 in) is recorded, showcasing a clear pattern of increasing rainfall as temperatures rise. The summer months dramatically alter the landscape, with July seeing a peak of 289 mm (11.4 in), reinforcing the region's reputation for significant summer rain. Overall, January serves as a precursor to a more dynamic precipitation pattern, characterized by a steady increase leading into the more humid summer months.
In January, Suwa, Japan experiences a relatively high humidity level of 76%, setting the tone for the winter months. The humidity gently declines as February approaches, with a slight drop to 74%, but begins to rise again in the spring. By May, humidity peaks at 81%, transitioning into the summer where the air becomes notably more humid, hitting a staggering 93% in July. This trend of increasing moisture continues until August, when the levels remain high at 90%. As summer fades, humidity gradually decreases, falling to 83% in October and settling at 78% by December. Overall, Suwa's humidity showcases a clear seasonal pattern, with crisp winter months giving way to the lush, moist atmosphere of summer.
In January, Suwa, Japan, experiences a moderate UV Index of 4, allowing for approximately 30 minutes of safe sun exposure before the risk of skin damage increases. As the months progress, a clear upward trend emerges, with February jumping to a high UV Index of 6, reducing safe burn time to 25 minutes. By March, the sun intensifies further, reaching a very high Index of 9, where just 15 minutes can lead to sunburn. The peak of this trend occurs in May and July, where the UV Index soars to an extreme level of 11 and a staggering 12, respectively, necessitating vigilant sun protection within just 10 minutes of exposure. As summer transitions into fall, the UV Index starts to decline, but remains notably high until October. With this in mind, staying informed about the UV Index, especially during the summer months, is crucial for safe sun enjoyment in Suwa. For more detailed information, visit Suwa UV Index.
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In January, Suwa basks in a serene 189 hours of sunshine, setting a tranquil tone for the year. As winter transitions into spring, February sees an upswing to 237 hours, hinting at the promise of warmer days. March and April continue this positive trend, with sunshine hours peaking at 268 and 284 respectively, as the landscape awakens in vibrant colors. May further amplifies this brilliance, reaching 292 hours, the highest point of the year. However, as summer approaches, the sunshine hours slightly dip in June to 266, while July sees another decrease to 235 hours. The golden rays make a strong comeback in August, soaring back to 285 hours. Post-summer, September and October experience a gradual decline, but still maintain a bright ambiance with 239 and 223 hours respectively. November and December bring a gentle conclusion to the year, with 238 and 227 hours of sunshine, ensuring that Suwa remains a charming destination, even in the chill of winter.
In Suwa, Japan, the likelihood of sunny weather in January stands at 36%, making it one of the month’s more overcast periods. This percentage reflects a subtle trend as January is followed by February, which sees a notable increase to 46% sunny days. The transition into spring is marked by consistently higher chances, peaking in October and November at 44% and 46%, respectively. Interestingly, summer months such as July and August drop to 32% and 24%, indicating a seasonally unpredictable weather pattern. Thus, while January might not be the sunniest month, it sets the stage for a gradual transition toward brighter skies as the year progresses.
In January, Suwa, Japan, experiences 9 hours of daylight, marking the beginning of a gradual transition towards longer days as the year progresses. By February, daylight increases to 10 hours, hinting at the promise of spring. As the days lengthen, March sees 11 hours of brightness, while April delights with 13 hours, welcoming the vibrant energy of the season. The peak arrives in May, where daylight reaches a glorious 14 hours, sustained throughout June and July. As summer wanes, daylight begins its slow retreat, dropping to 13 hours in August and gradually decreasing to 12 hours in September. The transition continues into autumn with 11 hours in October, followed by a return to 10 hours in November, and finally settling back at 9 hours in December. This cyclical dance of daylight reflects the rhythmic changes of nature, creating a mesmerizing tapestry of light across the seasons.
In January, Suwa, Japan, experiences a gentle breeze, with an average wind speed of 2.1 m/s (5 mph), setting a calm tone for the winter month. This slight uptick in wind speed compared to December's 1.9 m/s (4 mph) hints at the transition into the new year, as winds remain consistently moderate through February. However, as spring approaches, a noticeable decrease occurs in March, where winds drop to 1.9 m/s (4 mph), followed by a minimal resurgence in April at 2.0 m/s (4 mph). The trend continues to show variations throughout the year, with the summertime months of June and July experiencing their lowest wind speeds at 1.4 m/s (3 mph) and 1.3 m/s (3 mph), creating a soothing, tranquil environment. As autumn settles in, winds gradually pick up again, closing the year with November and December revisiting the 4 mph mark, demonstrating the rhythm of the seasons in Suwa's unique climate.
Weather in Suwa varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Suwa, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February exhibit similar chilly weather patterns, but with slight variations in temperature and precipitation. January records a minimum temperature of -18°C (0°F) and an average of -2°C (29°F), while February sees a marginally higher average temperature of -1°C (30°F) with the same minimum of -18°C (0°F). The maximum temperatures rise slightly from 12°C (53°F) in January to 15°C (60°F) in February. Precipitation increases slightly from 75 mm (3.0 in) in January to 80 mm (3.2 in) in February, although the number of rainy days decreases from 12 to 10. Humidity remains relatively constant, with January at 76% and February at 74%. For a more detailed look at February's weather patterns, check out Suwa weather in February.
In January, Suwa experiences frigid temperatures, with a minimum of -18°C (0°F) and an average temperature of -2°C (29°F). Precipitation is relatively light, totaling 75 mm (3.0 inches) over 12 days, accompanied by a higher humidity level of 76%. In contrast, March brings a noticeable warming trend, with minimum temperatures rising to -7°C (19°F) and an average of 4°C (40°F). The maximum temperature can reach up to 20°C (68°F), while precipitation increases to 141 mm (5.6 inches) over the same number of rainy days, though humidity decreases slightly to 70%. For more detailed information on the weather conditions in March, you can visit Suwa weather in March.
January weather is characterized by its cold temperatures, with a minimum of -18°C (0°F) and an average of -2°C (29°F), while the maximums reach only up to 12°C (53°F). This month typically sees around 75 mm (3.0 in) of precipitation over 12 days, accompanied by high humidity levels at 76%. In contrast, April brings a significant shift, with milder temperatures ranging from a minimum of -6°C (21°F) to a maximum of 26°C (78°F), resulting in an average of 9°C (48°F). Precipitation increases to 143 mm (5.6 in) over 13 days, and humidity remains relatively stable at 74%. For more detailed information about Suwa's April weather, you can refer to Suwa weather in April.
In January, temperatures in Suwa can drop to a chilling minimum of -18°C (0°F), with an average temperature around -2°C (29°F) and a maximum of 12°C (53°F). The month experiences about 75 mm (3.0 in) of precipitation over 12 days, coupled with a humidity level of 76%. In contrast, May brings a dramatic shift in weather, with minimum temperatures rising to -1°C (31°F) and averages reaching 15°C (58°F), while maximums can soar to 29°C (85°F). This month sees increased precipitation of 155 mm (6.1 in) over the same number of rainy days, along with slightly higher humidity at 81%. For a closer look at the month of May, you can find more information here: Suwa weather in May.
In January, the weather is characterized by frigid temperatures, with a minimum of -18°C (0°F) and an average of just -2°C (29°F). Snow is common, as evidenced by the 75 mm (3.0 in) of precipitation over 12 days, and humidity levels hover around 76%. In stark contrast, June brings a comfortable warmth, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 29°C (84°F), averaging 18°C (65°F). The month sees increased precipitation at 149 mm (5.8 in) across 14 days and a higher humidity level of 88%, creating a distinctly different atmosphere. For a detailed look at the weather during this vibrant month, visit Suwa weather in June.
January and July present stark contrasts in weather conditions. In January, temperatures range from a chilling -18°C (0°F) to a maximum of 12°C (53°F), with an average of -2°C (29°F). The month sees about 75 mm (3.0 in) of precipitation over 12 days, accompanied by a humidity level of 76%. In sharp contrast, July offers much warmer temperatures, with a minimum of 14°C (58°F) and an average of 22°C (72°F), peaking at a sweltering 33°C (91°F). Precipitation is significantly higher in July, totaling 289 mm (11.4 in) spread over 19 days, and humidity rises to 93%. For a closer look at July conditions, check out Suwa weather in July.
January and August present stark contrasts in weather conditions. In January, temperatures range from a chilling minimum of -18°C (0°F) to a maximum of 12°C (53°F), with an average temperature of -2°C (29°F). Precipitation occurs over 12 days, totaling 75 mm (3.0 in), and humidity levels sit at a chilly 76%. In contrast, August boasts a much warmer climate, with temperatures ranging from a pleasant minimum of 12°C (53°F) to a sweltering maximum of 33°C (92°F), and an average temperature of 23°C (74°F). The month experiences higher precipitation, accumulating 151 mm (5.9 in) over 16 days, along with elevated humidity at 90%. For more details, you can check Suwa weather in August.
January and September present striking contrasts in weather conditions. January tends to be quite cold, with temperatures ranging from a brisk minimum of -18°C (0°F) to a maximum of 12°C (53°F), accompanied by an average temperature of -2°C (29°F). The month sees about 75 mm (3.0 in) of precipitation over 12 days, and humidity levels hover around 76%. In sharp contrast, September is much warmer, with temperatures ranging from a minimum of 6°C (42°F) to a comfortable maximum of 30°C (86°F) and an average of 19°C (66°F). Precipitation in September is significantly higher at 171 mm (6.7 in) across 16 days, and humidity levels rise to 86%. For more detailed insights on September weather, visit Suwa weather in September.
January and October present contrasting weather conditions. In January, temperatures can drop as low as -18°C (0°F), with an average of -2°C (29°F) and a maximum of 12°C (53°F). The month sees about 75 mm (3.0 in) of precipitation over 12 days, accompanied by a humidity level of 76%. In stark contrast, October offers a milder climate, with temperatures ranging from a minimum of 0°C (33°F) to a pleasant average of 13°C (56°F), peaking at 26°C (79°F). This month experiences significantly higher precipitation, totaling 237 mm (9.3 in) over 16 days, and a slightly increased humidity level of 83%. For more detailed information on October weather, visit Suwa weather in October.
In January, the weather is characterized by much colder temperatures, with minimums dropping to -18°C (0°F) and an average around -2°C (29°F), contrasting sharply with November's milder conditions, where temperatures range from a minimum of -4°C (25°F) to an average of 7°C (44°F). Additionally, January experiences slightly more precipitation at 75 mm (3.0 in) over 12 days, compared to November's 66 mm (2.6 in) across 10 days. The humidity level is also a bit lower in January at 76%, while November has a higher humidity of 80%. For more detailed information on November weather, you can visit Suwa weather in November.
January and December exhibit notable differences in weather conditions. January tends to be colder, with average temperatures ranging from a minimum of -18°C (0°F) to a maximum of 12°C (53°F), while December experiences milder temperatures, with a minimum of -9°C (16°F) and a maximum of 16°C (62°F). Precipitation levels are relatively similar; January records 75 mm (3.0 in) over 12 days, while December sees slightly higher precipitation at 84 mm (3.3 in) across the same number of days. Additionally, both months maintain high humidity, with January at 76% and December slightly higher at 78%. For a detailed look at December’s weather patterns, visit Suwa weather in December.
January in Suwa presents a stark contrast to the milder months of the year. With average temperatures hovering around -2°C (29°F), the chill is palpable, often dipping to a frigid minimum of -18°C (0°F), making it the coldest month in the region. Precipitation, although substantial at 75 mm (3.0 in) over 12 days, tends to fall as snow, blanketing the landscape in a serene white. The humidity levels are notably high at 76%, adding to the wintry feel. These conditions create a uniquely brisk atmosphere, unlike the warmer, more temperate charms of the other seasons, making January a perfect time to experience Suwa's enchanting winter landscape. For a detailed overview of the seasonal climate variations, visit Suwa Climate.