Last updated: August 21, 2025
In Hachioji, Japan, January presents a diverse weather experience, characterized by a maximum temperature of 17°C (63°F) and a minimum of -13°C (9°F). The average temperature hovers around a chilly 3°C (37°F), making it a month of notable contrasts. With 53 mm (2.1 in) of precipitation over 7 days, the region sees a blend of sunny spells and wintry showers. The humidity level remains relatively high at 76%, contributing to the crisp air that envelops the city. This combination of factors creates a unique January landscape, ideal for both chilly explorations and cozy indoor activities.
In Hachioji, Japan, January presents a captivating mix of winter's chill and the promise of an impending thaw. With temperatures ranging from a frigid -13°C (9°F) at night to a balmy 17°C (63°F) during the day, the month showcases a stark contrast between the depths of winter and occasional mild spells. The average temperature sits at a cool 3°C (37°F), hinting at the seasonal transition to slightly warmer months ahead. As February approaches, the cold begins to relent, nudging the minimum up to -6°C (21°F) and raising daytime highs, inviting an early sense of spring. This gradual warming trend continues into March and April, making January a pivotal month that marks the tail end of deep winter while paving the way for budding blossoms and rising temperatures.
In January, Hachioji experiences a moderate level of precipitation, totaling 53 mm (2.1 in) across 7 days, setting a foundation for the wetter months that follow. This initial rainfall is relatively low compared to the subsequent months, with February witnessing a slight increase to 62 mm (2.4 in). By March, rainfall begins to escalate dramatically, peaking in the summer months. The January weather serves as a reminder of the seasonal transition, where winter’s dry spell gives way to the burgeoning wet season, climaxing in July with an impressive 312 mm (12.3 in). This upward trend illustrates how early winter precipitation in Hachioji subtly paves the way for the region's characteristic monsoon-like rains in late spring and summer.
January in Hachioji, Japan, brings a humidity level of 76%, setting the stage for a unique winter experience. As the month progresses into February, the humidity slightly decreases to 74%, signaling a trend of lower moisture as winter wanes. By March, the air continues to dry out, dropping to 70%, before a subtle increase in April and May sees levels rise to 74% and then 81% respectively, as spring blossoms. The arrival of summer in June ushers in a significant surge, with humidity levels reaching 88%, and July peaks at a sweltering 93%. Following this peak, August maintains a high of 90%, before a gradual decline begins in September at 86%. October and November reflect a stabilization period with humidity levels hovering around 83% and 80%, and December concludes the year at 78%. Overall, Hachioji’s humidity showcases a clear pattern: a crisp start to the year, escalating summer moisture, and a gradual retreat as autumn sets in.
In Hachioji, Japan, January welcomes the year with a moderate UV Index of 4, allowing for around 30 minutes of safe sun exposure. As the months progress, January's relatively mild UV levels give way to increasing intensity, peaking in the summer months where the index remains at an extreme 11 from May through August, drastically reducing burn times to just 10 minutes. Notably, March and April showcase a rapid escalation to a very high UV Index of 8 and 9, respectively, signaling that spring brings more potent rays. As fall approaches, the index gradually declines, reaching 5 in November before returning to a moderate 4 in December. This clear pattern underscores the importance of staying sun-safe, especially during the summer months. For more detailed insights, check out the Hachioji UV Index.
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In Hachioji, Japan, January marks a gentle ascent into the sunniest months of the year with 192 hours of sunshine. As winter makes way for spring, the sunlight gradually increases, peaking in May with a delightful 282 hours. The trend continues into the summer, where August shines the brightest at an impressive 284 hours. After the summer's peak, sunshine hours begin to decline, with a noticeable drop in July to 227 hours and further into the autumn months. Despite this decrease, the overall pattern reveals a vibrant cycle of light, with March and April also contributing generous hours, suggesting that Hachioji is beautifully bathed in sunshine for much of the year.
In Hachioji, Japan, January boasts a 57% chance of sunny weather, making it a relatively bright start to the year. As we shift into February, the likelihood of sun increases to 70%, marking the sunniest month in the early months of the year. However, this delightful trend takes a dip in March, where the chance of sunshine falls to 39%, and continues to fluctuate through the spring, with April at 45% and May dropping to just 21%. The sunniness seems to dwindle as summer approaches, hitting a low during the hot months, with July and August seeing only 27% and 29% chances, respectively. Following this, the autumn months bring a gradual recovery, with October and November returning closer to January levels at 46% and 56%. Even December climbs back up to 68%, suggesting Hachioji’s weather dance, where January’s sun is just the beginning of a fluctuating yet fascinating yearly pattern.
In Hachioji, Japan, January sets the stage for the gradual lengthening of daylight, offering 10 hours of sunlight. As February arrives, this duration remains unchanged, but as spring approaches in March, the days begin to stretch, providing 11 hours of daylight. The transition to longer days becomes evident in April and May, where daylight peaks at 14 hours during the early summer months of June and July. As summer wanes into August, daylight starts to decrease again, with 13 hours available. The trend towards shorter days continues through September and October, ultimately leading into November and December, where daylight slips down to just 9 hours by year’s end. This cycle of increasing and decreasing daylight highlights the rhythmic dance of seasons in Hachioji, reflecting nature's constant change.
In January, the gentle breezes of Hachioji blow at an average speed of 1.8 m/s (4 mph), setting a tranquil tone for the month. This mild wind, a precursor to the slightly brisker gusts that follow in February and March—where speeds reach 2.3 m/s (5 mph) and 2.4 m/s (5 mph) respectively—signals the gradual transition towards spring. As the months progress, the wind tends to fluctuate, with a dip in July to 1.5 m/s (3 mph), before the winds pick up again in the fall, averaging 1.7 m/s (4 mph) in September and stabilizing at 2.0 m/s (4 mph) in both October and December. Overall, while January starts off the year with calmness, it sets the stage for a notable increase in wind activity in the following months, demonstrating a rhythmic shift that characterizes Hachioji's winter and spring seasons.
Weather in Hachioji varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Hachioji, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February exhibit notable differences in weather conditions. January tends to be colder, with minimum temperatures reaching as low as -13°C (9°F) and an average of 3°C (37°F). In contrast, February experiences slightly milder conditions, with a minimum temperature of -6°C (21°F) and an average of 4°C (40°F). Precipitation is also higher in February, totaling 62 mm (2.4 in) over 10 days, compared to January's 53 mm (2.1 in) over 7 days. Additionally, humidity remains relatively high in both months, with January at 76% and February at 74%. For more detailed information, you can refer to Hachioji weather in February.
January and March exhibit notable differences in weather, reflecting the transition from winter to early spring. In January, temperatures range from a chilly -13°C (9°F) at their lowest to a mild 17°C (63°F) at their peak, with an average temperature of around 3°C (37°F). The month sees an average of 53 mm (2.1 in) of precipitation over approximately 7 days, accompanied by a relatively high humidity of 76%. In contrast, March welcomes warmer conditions with minimum temperatures of -4°C (26°F) and maximums reaching 23°C (73°F), resulting in an average temperature of 8°C (47°F). However, it's also wetter, with precipitation soaring to 166 mm (6.5 in) over about 14 days, while humidity slightly decreases to 70%. For a closer look at what to expect during the month, you can refer to Hachioji weather in March.
January and April present distinct contrasts in weather conditions. In January, temperatures range significantly from a chilly minimum of -13°C (9°F) to a mild maximum of 17°C (63°F), with an average of around 3°C (37°F). Precipitation is relatively low, with around 53 mm (2.1 in) falling over approximately 7 days, and humidity levels at 76%. In comparison, April experiences a much warmer climate, with minimum temperatures at -2°C (29°F) and maximums reaching 26°C (79°F), giving an average of 12°C (54°F). However, April is wetter, with precipitation totals climbing to 150 mm (5.9 in) over 15 days, and humidity slightly lower at 74%. For more detailed insights, check Hachioji weather in April.
In January, temperatures are quite chilly, with a minimum of -13°C (9°F) and an average of 3°C (37°F), peaking at a maximum of 17°C (63°F). The month experiences moderate precipitation at 53 mm (2.1 in) over about 7 days, accompanied by relatively high humidity at 76%. In contrast, May brings milder weather, with temperatures ranging from a minimum of 4°C (39°F) to an average of 17°C (64°F) and a maximum reaching 30°C (86°F). However, May also sees increased precipitation, totaling 148 mm (5.8 in) over 15 days, while humidity rises slightly to 81%. This stark contrast in weather patterns highlights the transition from the cold depths of winter to the warming embrace of spring. For more details on May weather, you can visit Hachioji weather in May.
January and June in Hachioji present stark contrasts in weather. January experiences colder temperatures, with a minimum of -13°C (9°F) and an average of 3°C (37°F), while June sees much warmer conditions, featuring a minimum of 11°C (52°F) and an average of 20°C (69°F). Precipitation is significantly higher in June, with rainfall measuring 209 mm (8.2 in) over 19 days, compared to just 53 mm (2.1 in) over 7 days in January. Additionally, humidity levels rise from 76% in January to 88% in June, making the summer months feel more muggy. For more insights on June weather, visit Hachioji weather in June.
January brings cold temperatures to Hachioji, with average highs around 3°C (37°F) and lows dipping to -13°C (9°F). Meanwhile, July offers a stark contrast, with much warmer weather as temperatures range from a minimum of 16°C (60°F) to a maximum of 35°C (95°F) and an average of 24°C (76°F). In terms of precipitation, January sees about 53 mm (2.1 in) over 7 days, whereas July is marked by significantly higher rainfall totaling 312 mm (12.3 in) over 24 days, resulting in increased humidity levels of 93%. For a more detailed look at July weather in Hachioji, you can visit Hachioji weather in July.
January and August present stark contrasts in weather conditions. In January, temperatures range from a chilly minimum of -13°C (9°F) to a mild maximum of 17°C (63°F), with an average temperature of around 3°C (37°F). Precipitation is relatively low at 53 mm (2.1 in) over 7 days, and humidity stands at 76%. In contrast, August experiences significantly warmer temperatures, with a minimum of 15°C (59°F) and a maximum reaching up to 36°C (97°F), averaging around 26°C (79°F). Additionally, it is much wetter, receiving 195 mm (7.7 in) of rain over 23 days, coupled with high humidity levels of 90%. For more details on August weather, check out Hachioji weather in August.
January and September present contrasting weather patterns. In January, temperatures range from a chilly minimum of -13°C (9°F) to a mild maximum of 17°C (63°F), with an average of around 3°C (37°F). The month sees relatively low precipitation at 53 mm (2.1 in) over about 7 days, and humidity levels settle at 76%. In stark contrast, September boasts much warmer temperatures, with a minimum of 12°C (53°F) and a maximum reaching up to 35°C (94°F), averaging 22°C (71°F). This month is also significantly wetter, with 247 mm (9.7 in) of rain spread over 22 days, accompanied by higher humidity at 86%. For more detailed insights about the weather in September, check out Hachioji weather in September.
In January, the weather is characterized by cold temperatures, with lows dipping to -13°C (9°F) and an average of about 3°C (37°F). The month sees a maximum temperature of 17°C (63°F) and experiences around 53 mm (2.1 in) of precipitation over approximately 7 days, all amidst a humidity level of 76%. In contrast, October offers a much milder climate; the temperatures range from a minimum of 5°C (41°F) to a comfortable maximum of 30°C (86°F), with an average of 16°C (61°F). However, October is significantly wetter, with precipitation reaching 346 mm (13.6 in) across about 19 days and slightly higher humidity at 83%. For more detailed insights, you can check Hachioji weather in October.
In January, the weather is significantly colder, with temperatures ranging from a minimum of -13°C (9°F) to a maximum of 17°C (63°F), and an average temperature of 3°C (37°F). This month sees about 53 mm (2.1 in) of precipitation over 7 days and a humidity level of 76%. In contrast, November experiences milder conditions, with a minimum of -1°C (30°F) and a maximum of 23°C (73°F), leading to an average temperature of 11°C (52°F). November also has slightly higher precipitation at 72 mm (2.8 in) spread over 10 days and a humidity of 80%. For more insights on how November weather compares, you can check Hachioji weather in November.
January typically experiences colder temperatures compared to December, with minimums dropping as low as -13°C (9°F) and an average of 3°C (37°F). In contrast, December sees milder conditions with a minimum of -5°C (23°F) and an average of 5°C (42°F). Precipitation is slightly less in January, at 53 mm (2.1 in) over 7 days, compared to December's 62 mm (2.4 in) over 9 days. Humidity levels are also slightly lower in January at 76%, while December maintains a humidity level of 78%. For more information on weather conditions in December, visit Hachioji weather in December.
In January, Hachioji experiences a notable shift in weather compared to the rest of the year. The temperatures range from chilly lows to mild highs, making the month one of the coldest yet surprisingly manageable periods. With an average temperature sitting around 3°C, the crisp air can feel invigorating, while the significant humidity at 76% adds a unique character to the winter atmosphere. Additionally, with approximately 53 mm of precipitation spread over just seven days, January remains relatively dry compared to the wetter summer months, allowing for clearer, albeit colder, skies. For a deeper dive into Hachioji’s climate patterns throughout the year, visit Hachioji Climate.