Last updated: August 21, 2025
January in Itoigawa, Japan presents a chilly and wet winter landscape, with temperatures ranging from a brisk -5°C (23°F) at night to a daytime maximum of 11°C (53°F). The average temperature hovers around 2°C (35°F), emphasizing the need for warm clothing. This month is characterized by high humidity levels, typically around 88%, contributing to a damp atmosphere. With a significant 263 mm (10.4 in) of precipitation falling over 23 days, January is one of the wetter times of the year, making it essential for visitors to be prepared for frequent rain and the occasional snow.
In Itoigawa, Japan, January greets visitors with its chilly embrace, featuring temperatures that range from a frigid minimum of -5°C (23°F) to a maximum of 11°C (53°F). The average temperature hovers around 2°C (35°F), setting the stage for a crisp and invigorating winter atmosphere. As the month progresses into February, the cold deepens slightly with a min of -6°C (22°F), but the average remains consistent, indicating a steady winter chill. This trend persists into March when temperatures begin to show a hint of warmth, transitioning to 5°C (41°F) on average, casting a subtle promise of spring. The gradual rise in temperatures from January's depths towards the milder months reflects the region's slow and steady shift from winter's grip to the gentler embrace of spring, with each passing month unveiling nature's tableau as it awakens.
In January, Itoigawa, Japan, experiences significant rainfall, with 263 mm (10.4 in) of precipitation falling over an average of 23 days. This wet start to the year sets the tone for an increasingly variable climate, as rainfall decreases to 235 mm (9.2 in) in February before dropping to 175 mm (6.9 in) by March. This trend marks a gentle tapering off as spring approaches, leading to milder precipitation amounts in the following months. Notably, July stands out as the wettest month, with 347 mm (13.7 in), reminiscent of the heavy rain patterns seen earlier in the year. Conversely, May through June showcases the driest periods, with just 138 mm (5.4 in) and 168 mm (6.6 in), respectively. Overall, Itoigawa's January set a robust foundation for a year filled with diverse weather, oscillating between heavy rainfall and relative dryness, highlighting the dynamic climatology of the region.
In January, Itoigawa experiences a high humidity level of 88%, setting a tone of dampness that persists through the winter months. This moisture lingers, slightly decreasing to 86% in February before dipping to 81% in March as hints of spring begin to emerge. However, by June, humidity climbs back to 88%, indicating a rekindled moisture as the summer heat approaches. Summer months, particularly July and August, witness peak humidity at 92%, creating a lush and verdant atmosphere. As the year transitions into fall, humidity gradually declines, hovering around 85% to 89% from September through November, before stabilizing at 86% by December. This annual rhythm showcases not only the wet winters of Itoigawa but also the humid summers that define its unique climate.
In January, Itoigawa experiences a moderate UV Index of 3, indicating that while sun exposure is less intense, care should still be taken if you plan to be outdoors for longer than 30 minutes. As the months progress, the UV Index gradually rises, peaking at a striking 11 during the extreme summer months of July and August, where a mere 10 minutes of exposure can lead to sunburn. April and May also showcase high UV levels at 9 and 10, respectively, urging caution as spring unfolds. Interestingly, the UV Index trends lower again in the latter half of the year, dropping back to 3 by December, reminiscent of the safer levels found in January. This seasonal shift highlights the importance of adapting sun protection measures throughout the year in Itoigawa. For more detailed information, visit the Itoigawa UV Index.
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In Itoigawa, Japan, January greets residents with 148 hours of sunshine, a modest start to the year in contrast to the progressively brighter months ahead. As winter gives way to spring, the city basks in an impressive rise, with February recording 204 hours and March soaring to 259 hours. By April, the sun shines even more generously, reaching 280 hours, peaking in May with 303 hours—the most luminous month of the year. As we transition into the summer, sunshine remains abundant, with June clocking in at 297 hours and July at 286 hours. Although sunshine begins to wane in August, it still boasts a healthy 302 hours. The autumn months bring a gradual decline, with September at 252 hours and October at 227 hours, leading into the shorter, cloudier days of November and December. Thus, Itoigawa's sunlight patterns reveal a vibrant symphony of seasonal change, inviting wonder and exploration throughout the year.
In Itoigawa, Japan, January brings a modest 21% chance of sunny weather, making it one of the cloudier months of the year. As the seasons transition, the likelihood of sunshine gradually increases, with February showing a slight improvement at 31%. This upward trend continues into March and April, where the sun starts to make more frequent appearances, peaking at 45% in April. The data clearly illustrates that as winter gives way to spring, residents can expect brighter days ahead, while January remains a time for cozy indoor activities amidst the chilly, overcast skies.
In Itoigawa, Japan, January marks the beginning of the year with 9 hours of daylight, creating a cozy, wintry atmosphere. As the seasons progress into February and March, we see a gradual increase in daylight hours, reaching 11 hours by March, a hint of the longer, sunnier days to come. This trend continues into April and May, where daylight extends to a generous 13 and 14 hours, respectively, welcoming the vibrant energy of spring and early summer. Interestingly, the daylight hours plateau at 14 hours from June through July, basking the city in sunlight during the height of summer. As August approaches, a gradual decline begins, transitioning back to 13 hours and subsequently tapering off with 12 hours in September. By autumn and winter months, daylight shrinks again, returning to 10 hours in November and back to 9 hours in December, echoing the cycle of the seasons. This rhythmic ebb and flow of daylight beautifully illustrates the passage of time in this enchanting locale.
In January, the coastal town of Itoigawa, Japan, experiences a brisk average wind speed of 3.4 m/s (approximately 8 mph), marking the beginning of a seasonal trend that sees fluctuating winds as the year unfolds. As winter progresses into February, these winds strengthen slightly, reaching 3.9 m/s, before tapering off in the spring months, where both March and April settle back to a gentler 2.5 m/s. This shift signals a transition from the chill of winter to the milder breezes of spring, with May experiencing a slight uptick to 2.7 m/s. As the summer months roll in, wind speeds dwindle significantly, averaging a calm 1.6 m/s in July and August, creating a serene atmosphere ideal for outdoor activities. However, the section into fall brings a gradual revival of wind, peaking again in November at 3.3 m/s, before descending back to 3.7 m/s by December. This rhythmic cycle of wind patterns showcases Itoigawa's unique climate, where breezy winters shift to still summers, only to rise once more as the year draws to a close.
Weather in Itoigawa varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Itoigawa, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February exhibit quite similar weather patterns, but there are notable distinctions. In January, temperatures range from a minimum of -5°C (23°F) to a maximum of 11°C (53°F), while February is slightly cooler, with a minimum of -6°C (22°F) and a maximum of 12°C (54°F). January also experiences higher precipitation, with 263 mm (10.4 in) over 23 days compared to February's 235 mm (9.2 in) across 22 days. Humidity levels are slightly higher in January at 88%, whereas February presents a marginally lower humidity of 86%. For those looking for specific details about February weather in Itoigawa, please check Itoigawa weather in February.
In January, temperatures in Itoigawa can be quite chilly, with a minimum average of -5°C (23°F) and a maximum reaching only 11°C (53°F). The month typically sees significant precipitation, totaling around 263 mm (10.4 in) over 23 days, along with high humidity at 88%. In contrast, March marks a noticeable transition, featuring slightly milder temperatures, with a minimum of -4°C (24°F) and a maximum of 16°C (61°F). Additionally, precipitation decreases to 175 mm (6.9 in) over 18 days, and humidity lowers to 81%. This change indicates a shift towards spring, making March a more pleasant month overall. For more detailed information, you can check Itoigawa weather in March.
January weather in Itoigawa is characterized by its cold temperatures, with a minimum of -5°C (23°F) and an average of 2°C (35°F), leading to a predominantly chilly ambiance. The month experiences significant precipitation, totaling 263 mm (10.4 in) over 23 days, contributing to a high humidity level of 88%. In contrast, April brings a noticeable warming trend, with temperatures ranging from a minimum of -1°C (31°F) to an average of 9°C (49°F) and a maximum of 21°C (70°F). Additionally, precipitation decreases to 174 mm (6.9 in) over 15 days, and humidity drops to 78%. For more details on April weather, you can check Itoigawa weather in April.
January weather in Itoigawa is characterized by colder temperatures, with a minimum of -5°C (23°F) and an average of 2°C (35°F), reaching a maximum of 11°C (53°F). The month is quite wet, receiving 263 mm (10.4 in) of precipitation over 23 days, and the humidity is high at 88%.
In contrast, May brings significantly milder temperatures, with a minimum of 6°C (42°F), an average of 15°C (59°F), and a maximum of 26°C (79°F). Precipitation levels decrease to 138 mm (5.4 in) spread over just 15 days, and humidity also drops to 81%.
For a closer look at the weather in May in Itoigawa, you can visit Itoigawa weather in May.
In January, the weather is characterized by cold temperatures, with minimums dropping to -5°C (23°F) and an average of 2°C (35°F), making it a chilly month overall. Precipitation is significant, totaling 263 mm (10.4 in) over 23 days, contributing to high humidity levels of 88%. In contrast, June experiences a much milder climate, with minimum temperatures around 10°C (51°F) and an average of 19°C (66°F), peaking at 26°C (80°F). Rainfall decreases to 168 mm (6.6 in) spread across only 13 days, while humidity remains constant at 88%. For more detailed insights, you can explore Itoigawa weather in June.
In January, the weather is quite cold, with temperatures ranging from a minimum of -5°C (23°F) to a maximum of 11°C (53°F). The month experiences significant precipitation, averaging 263 mm (10.4 in) over 23 days, accompanied by high humidity levels at 88%. In stark contrast, July offers a warm climate, with temperatures fluctuating between 18°C (64°F) and 34°C (94°F), along with increased precipitation of 347 mm (13.7 in) over the same number of days. The humidity in July also rises slightly to 92%, reflecting the heavy rainfall common during the summer months. For more details on July weather, you can check Itoigawa weather in July.
January and August present starkly contrasting weather conditions. In January, temperatures range from a minimum of -5°C (23°F) to a maximum of 11°C (53°F), with an average of just 2°C (35°F), creating a chilly atmosphere. The month records significant precipitation, totaling 263 mm (10.4 in) over 23 days, accompanied by high humidity at 88%. In contrast, August boasts a much warmer climate, with temperatures ranging from a minimum of 18°C (64°F) to a maximum of 33°C (91°F), averaging 26°C (78°F). Despite having similar precipitation levels at 265 mm (10.4 in) over 20 days, the humidity rises slightly to 92%, adding to the summer heat. For more details on August weather, you can check Itoigawa weather in August.
January and September present contrasting weather patterns in Itoigawa. In January, temperatures are quite chilly, with a minimum of -5°C (23°F) and an average of 2°C (35°F), while maxing out at 11°C (53°F). Precipitation is significant, totaling 263 mm (10.4 in) over 23 days, coupled with high humidity at 88%. In contrast, September experiences much warmer conditions, with temperatures ranging from a minimum of 13°C (56°F) to a maximum of 32°C (90°F), and an average of 22°C (72°F). Although precipitation is slightly higher in September, totaling 265 mm (10.4 in) over 21 days, humidity remains comparable at 89%. For a more detailed look, check Itoigawa weather in September.
January and October exhibit quite distinct weather conditions. In January, temperatures range from a chilly -5°C (23°F) at night to a mild 11°C (53°F) during the day, with an average of 2°C (35°F). The month experiences significant rainfall, totaling 263 mm (10.4 in) over 23 days, and the humidity hovers around a high 88%. In contrast, October enjoys considerably warmer temperatures, with nighttime lows of 8°C (47°F) and daytime highs reaching 28°C (82°F), averaging at 16°C (62°F). Although the precipitation is slightly lower at 258 mm (10.2 in) over 18 days, the humidity remains comparable at 87%. This stark contrast highlights the seasonal transition from the frigid depths of winter to the mildness of early autumn. For more detailed information on October weather specifics, you can check Itoigawa weather in October.
January and November present distinctly different weather patterns. In January, temperatures range from a chilly -5°C (23°F) to a milder max of 11°C (53°F), with an average of 2°C (35°F). This month sees significant precipitation at 263 mm (10.4 in) over 23 days and a high humidity level of 88%. In contrast, November enjoys milder conditions, with temperatures varying from 0°C (32°F) to 22°C (71°F) and an average of 11°C (51°F). The total precipitation for November is 185 mm (7.3 in) across 19 days, accompanied by slightly lower humidity at 85%. For a detailed look at the weather in November, visit Itoigawa weather in November.
When comparing the weather in January and December, January typically experiences slightly colder temperatures, with a minimum of -5°C (23°F) and an average of 2°C (35°F), compared to December's minimum of -4°C (26°F) and an average of 4°C (40°F). Additionally, January sees a modest decrease in precipitation, totaling 263 mm (10.4 in) over 23 days, while December is wetter with 294 mm (11.6 in) spread across 24 days. Humidity levels remain relatively high in both months, with January at 88% and December slightly lower at 86%. For more detailed insights into December weather conditions, you can refer to Itoigawa weather in December.
January in Itoigawa brings a distinctly cold and wet climate, setting it apart from the milder months of the year. With average temperatures hovering around 2°C, this month is characterized by a noticeable chill, with frequent dips below freezing. The high humidity levels, reaching 88%, combined with substantial precipitation over 23 days result in a damp atmosphere that can feel particularly brisk. This contrasts sharply with the warmer, dryer conditions of spring and summer, making January a unique experience for visitors and locals alike. For more detailed insights into the weather patterns throughout the year, check out Itoigawa Climate.