Last updated: August 21, 2025
January weather in the USA and Japan offers a diverse experience, characterized by temperature variations and an overall chill in the air. The maximum temperature reaches a pleasant 16°C (61°F), while the cool average settles around 6°C (42°F), dipping to a brisk minimum of -4°C (25°F). Visitors can expect moderate precipitation, totaling 52 mm (2.0 in) over approximately 6 days, contributing to a humidity level of about 75%. This blend of cool temperatures and occasional rain makes January a unique time to experience the winter landscapes and cultural offerings in both countries.
In January, temperatures in Japan fluctuate from a chilly min of -4°C (25°F) to a mild max of 16°C (61°F), offering a crisp start to the year. As the month progresses, the pattern reveals an average temperature of 6°C (42°F), hinting at the warming trend that continues through February, where highs reach 20°C (68°F). This gradual rise foreshadows the delightful spring weather ahead, with temperatures climbing steadily to 11°C (51°F) in March and peaking dramatically to 25°C (78°F) by April. The data illustrates a clear transition from the biting cold of winter to the warming embrace of spring, paving the way for the vibrant conditions that follow in the coming months.
In January, the USA experiences relatively low precipitation, averaging 52 mm (2.0 in) over 6 days, emphasizing a dry start to the year. This trend shifts dramatically as the months progress, with February seeing a slight increase to 71 mm (2.8 in). The subsequent months witness a notable surge, particularly in July, where precipitation peaks at a striking 329 mm (13.0 in) over 19 days. This peak not only highlights the summer's intensified rainfall but also points to a seasonal pattern where precipitation accumulates steadily, culminating in the wetter months of late spring and summer. By the time we reach November and December, the cycle begins to taper off again, reinforcing a seasonally driven fluctuation in rainfall across the year.
In January, both the USA and Japan experience a notable humidity level of 75%, setting the stage for a gradual but significant increase as the year progresses. As winter gives way to spring, humidity levels hover around 71% in February and March, before climbing to 78% in April. The onset of summer brings a dramatic rise, with humidity peaking at an impressive 92% in July. Following this peak, humidity remains elevated but begins to slightly dip, settling at 81% in November and 79% in December. Overall, the trends reveal a clear seasonal pattern: a steady ascent through spring and summer, followed by a gentle decline as fall approaches, painting a vivid picture of the shifting climate in these regions.
In January, the UV Index in both the USA and Japan starts at a moderate level of 4, allowing for approximately 30 minutes of unprotected sun exposure before skin damage occurs. As the months progress, there is a noticeable increase in UV intensity, peaking in the summer months of July and August, reaching an extreme level of 12 with burn times dropping to just 10 minutes. This trend underlines the importance of sun safety practices as winter transitions to spring, and then into the more hazardous summer months. By August, the UV Index remains high, before gradually decreasing into the fall, with another return to moderate levels by December. For further insights on UV Index trends, check out Usa UV Index.
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As January ushers in the new year, both the USA and Japan enjoy a modest 172 hours of sunshine, laying the groundwork for increasing daylight in the months ahead. February sees a notable rise to 229 hours, hinting at the slow transition towards spring. By March, sunshine hours continue to climb to 261, paving the way for a vibrant April that boasts 276 hours. This upward trend peaks in August with an impressive 297 hours, marking the height of summer luminosity. As the year progresses, sunlight gradually diminishes, particularly in autumn and winter, with December bringing 217 hours—a serene close to the year's cycle. This annual ebb and flow of sunshine not only influences the seasons but also enriches the landscapes and lives of those in these two vibrant nations.
In January, the likelihood of experiencing sunny weather in the USA and Japan is approximately 40%, making it a month where the sun shines more often than not, yet still leaves room for overcast skies. This figure is notable compared to February, which sees a slight increase to 47%. Interestingly, the chance for sunshine fluctuates through the spring months, with March dipping to 38% and April rising again to 44%. As the year progresses, sunny days become more common, peaking in October at an impressive 62%. The trend illustrates a seasonal transition where the sun plays a more prominent role as winter gives way to spring and summer, underscoring January as a time that hints at brighter days ahead.
In both the USA and Japan, January marks the beginning of a gradual shift in daylight duration that steadily increases as winter gives way to spring. Starting with around 10 hours of daylight, the days slowly lengthen, gaining an extra hour by March, when daylight reaches 11 hours. As we transition into April and May, daylight peaks at an invigorating 13 hours, maintaining this length until the long summer days of June and July, where the sun graces both nations for 14 hours. As summer wanes into autumn, daylight begins its gentle decline, with hours slowly receding to 10 hours by November and further dwindling to 9 hours in December. This rhythmic cycle mirrors the natural ebb and flow of the seasons, inviting citizens to savor the sunlight while it lasts.
In January, the winds in the USA and Japan reach an average speed of 3.0 m/s (7 mph), setting the stage for the winter season. As January fades into February, there is a noticeable uptick, with winds picking up to 3.6 m/s (8 mph), suggesting a brisk start to the new year. However, this momentum cools as March approaches; the average wind speed dips to 2.6 m/s (6 mph), reflecting the gentle transition into spring. April sees a rebound to 3.0 m/s, but winds fluctuate throughout the year, hitting their lowest point in June and August at 2.2 m/s (5 mph). Interestingly, November and December witness a resurgence, with speeds returning to 2.8 m/s (6 mph) and 3.3 m/s (7 mph), hinting at winter's approach. Overall, while January kicks off with lively breezes, the year exhibits a dynamic rhythm of ebb and flow, encapsulating the changing seasons beautifully.
Weather in Usa varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Usa, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February exhibit relatively similar temperatures, with both months experiencing a minimum of -4°C (25°F). However, February tends to be slightly milder, featuring an average temperature increase to 6°C (44°F) and a higher maximum of 20°C (68°F) compared to January's peak of 16°C (61°F). In terms of precipitation, February is wetter, receiving 71 mm (2.8 in) across 10 days, while January sees less with 52 mm (2.0 in) over 6 days. Additionally, February has a lower humidity level at 71%, compared to January's 75%. Overall, February offers warmer days but with increased chances of rainfall. For more details, you can check out Usa weather in February.
January and March exhibit notable differences in weather patterns. In January, temperatures range from a minimum of -4°C (25°F) to a maximum of 16°C (61°F), with an average of 6°C (42°F). This month sees 52 mm (2.0 in) of precipitation over six days, and humidity is relatively high at 75%. In contrast, March experiences milder temperatures, with a minimum of 2°C (36°F) and a maximum of 21°C (71°F), giving it an average temperature of 11°C (51°F). However, March also has increased precipitation, totaling 122 mm (4.8 in) over 12 days, and slightly lower humidity at 71%. For more detailed information, you can visit Usa weather in March.
In January, the weather tends to be quite chilly, with temperatures ranging from a minimum of -4°C (25°F) to a maximum of 16°C (61°F), and an average temperature of 6°C (42°F). The month typically sees about 52 mm (2.0 in) of precipitation over 6 days, accompanied by a relative humidity of 75%.
In contrast, April experiences a significant warming trend, with minimum temperatures around 5°C (41°F) and maximum temperatures soaring to 25°C (78°F), resulting in an average of 15°C (59°F). Precipitation also increases, totaling 114 mm (4.5 in) spread over 9 days, and humidity rises slightly to 78%. This transition marks a shift from the cold, damp conditions of January to the milder, wetter atmosphere of spring. For more details on the weather in April, you can explore this link: Usa weather in April.
In January, the weather is characterized by chilly temperatures, with a minimum of -4°C (25°F) and an average of 6°C (42°F), while the maximum reaches 16°C (61°F). This month experiences around 52 mm (2.0 in) of precipitation over approximately six days, accompanied by a humidity level of 75%. In contrast, May brings a much warmer climate, with temperatures ranging from a minimum of 9°C (48°F) to an average of 20°C (68°F) and a high of 30°C (86°F). Precipitation increases significantly to 156 mm (6.2 in) spread over 11 days, coupled with higher humidity at 84%. For more details on weather in May, check out Usa weather in May.
January presents a stark contrast to June in terms of weather conditions. In January, temperatures range from a chilly -4°C (25°F) at their lowest to a mild 16°C (61°F) at their highest, with an average of 6°C (42°F). The month also sees a modest amount of precipitation, with 52 mm (2.0 in) spread over 6 days, while humidity remains relatively low at 75%.
On the other hand, June features significantly warmer temperatures, ranging from a minimum of 16°C (61°F) to a maximum of 31°C (87°F), with an average of 23°C (74°F). However, June experiences much higher rainfall, totaling 194 mm (7.6 in) across 14 days and a rise in humidity to 86%. For more details on the weather conditions in June, visit Usa weather in June.
January and July present stark contrasts in weather. In January, temperatures in the region range from a chilly minimum of -4°C (25°F) to a mild maximum of 16°C (61°F), with an average temperature of 6°C (42°F). The month sees about 52 mm (2.0 in) of precipitation spread over approximately 6 days, alongside a humidity level of 75%. In sharp contrast, July experiences much warmer conditions, with temperatures soaring from a minimum of 19°C (67°F) up to a maximum of 34°C (93°F) and an average of 27°C (80°F). This summer month is significantly wetter, accumulating around 329 mm (13.0 in) of rainfall over 19 days and a higher humidity level of 92%. For more detailed insights into July weather, visit Usa weather in July.
January and August present starkly contrasting weather conditions. In January, temperatures can dip as low as -4°C (25°F) with an average of 6°C (42°F), while August boasts much warmer temperatures, ranging from a minimum of 20°C (68°F) to a maximum of 35°C (95°F). Additionally, January experiences relatively low precipitation at 52 mm (2.0 in) over just 6 days, whereas August sees a significant increase, with 224 mm (8.8 in) spread over 14 days. Humidity levels also differ notably, with January at 75% compared to August’s high of 91%. For more insights, you can check out this link: Usa weather in August.
January and September present stark contrasts in weather conditions. In January, temperatures range from a chilly -4°C (25°F) at night to a mild 16°C (61°F) during the day, with an average of 6°C (42°F). This month sees approximately 52 mm (2.0 in) of precipitation over about 6 days, accompanied by a humidity level of 75%. In contrast, September offers significantly warmer temperatures, with nighttime lows around 16°C (62°F) and daytime highs reaching 33°C (91°F), averaging 24°C (76°F). However, it also experiences more precipitation, totaling 173 mm (6.8 in) over about 15 days, and a higher humidity of 84%. For a deeper comparison of weather in September, you can check out this link: Usa weather in September.
In January, the weather tends to be quite chilly, with temperatures ranging from a minimum of -4°C (25°F) to a maximum of 16°C (61°F) and an average of 6°C (42°F). The month experiences around 52 mm (2.0 in) of precipitation over approximately 6 days, coupled with a humidity level of 75%. In stark contrast, October presents a much warmer climate, featuring temperatures that vary between a minimum of 10°C (50°F) and a maximum of 29°C (85°F), with an average of 19°C (67°F). October also sees significantly higher precipitation at 138 mm (5.4 in) across 9 days and increased humidity at 83%. For more detailed information, you can check Usa weather in October.
In comparing the weather between January and November, we see a notable shift in temperatures and humidity. January typically experiences colder conditions, with minimum temperatures dipping to -4°C (25°F) and an average of 6°C (42°F), while November offers a milder climate, with minimums starting at 4°C (40°F) and an average of 13°C (56°F). The maximum temperature in January can reach 16°C (61°F), whereas in November it rises significantly to 26°C (79°F). Precipitation levels are quite similar, with January receiving 52 mm (2.0 in) and November slightly less at 47 mm (1.9 in), both experiencing rain on roughly six days. Humidity is marginally higher in November at 81%, compared to January's 75%. For a more detailed look at weather patterns during this time, check out Usa weather in November.
In comparing the weather of January and December, January tends to be colder, with temperatures ranging from a minimum of -4°C (25°F) to a maximum of 16°C (61°F), while December sees slightly milder temperatures from -1°C (31°F) to 21°C (71°F). Precipitation is similar, with January receiving 52 mm (2.0 in) over 6 days, compared to December's 59 mm (2.3 in) over 8 days. Humidity is slightly lower in January at 75%, whereas December has a higher humidity of 79%. Overall, January is characterized by more significant cold days, while December still retains a moderate warmth. For a more detailed overview of the December weather, check out Usa weather in December.
In January, the USA experiences a significant dip in temperatures, with conditions far cooler than the milder months that precede and follow it. The chill in the air is accompanied by a noticeable increase in humidity, creating a brisk and sometimes damp atmosphere. While January brings only a modest amount of rainfall, the combination of cold temperatures and relative humidity can make it feel much colder, impacting outdoor activities. This month stands out as a time for cozy indoors, reflecting a sharp contrast to the warmer, sunnier days of spring and summer. For a deeper understanding of seasonal variations, explore more at Usa Climate.