Last updated: August 21, 2025
In January, Numazu, Japan, experiences a diverse range of temperatures, with daily highs reaching up to 17°C (62°F) and lows dipping to 0°C (32°F). The average temperature settles around 8°C (46°F), providing a cool yet comfortable atmosphere. Rainfall is notable this month, with a total precipitation of 71 mm (2.8 in) over approximately 6 days, contributing to an overall humidity level of 76%. This blend of mild temperatures and occasional rain makes January a unique time to explore the natural beauty and vibrant culture of Numazu.
In Numazu, Japan, January brings a touch of winter chill, with temperatures ranging from a crisp 0°C (32°F) at night to a mild 17°C (62°F) during the day, averaging around 8°C (46°F). As the month unfolds, the cold begins to thaw slightly, leading into February, where temperatures remain steady but increase just slightly, exemplifying a gradual transition into early spring. This consistent trend continues as the days lengthen into March, with a noticeable uptick in warmth, reflected in the rising average temperatures that flirt with double digits, reaching 11°C (52°F). The progression through winter to spring showcases Numazu's distinct seasonal rhythm, where each month subtly shifts, preparing the region for the more pronounced warmth of spring and summer ahead.
January in Numazu, Japan, sees a moderate precipitation of 71 mm (2.8 in), falling over just 6 days of the month. This initial rainfall sets the stage for a significant uptick in precipitation as the year progresses, with February experiencing a notable increase to 99 mm (3.9 in) over 8 days. The trend intensifies dramatically in the spring and summer months, culminating in July, which witnesses a staggering 437 mm (17.2 in) across 21 days. This pattern illustrates a gradual escalation in rainfall, indicating a shift from the relatively dry start of the year to the wetter and more tumultuous weather conditions typical of mid-year in Numazu. As winter transitions into spring, it's evident that those seeking sunshine would do well to enjoy the early months before the heavy rains take hold.
In January, Numazu, Japan, experiences a relatively high humidity level of 76%, setting the stage for a winter season that remains significantly damp. As the months progress into February and March, humidity begins to gradually decline, reaching its lowest point of 70% in March. However, as spring unfolds, humidity levels tick back up in April before surging to 81% in May, transitioning into the much more humid summer months. From June onwards, the region faces a notable spike, peaking at a steamy 93% in July, crafting a lush, verdant landscape. This pattern reflects the distinctive seasonal shift in Numazu, where winter's crispness gives way to the unrelenting humidity of summer, complemented by a slight tapering off into the autumn months, with humidity levels hovering around 80% in November and dropping to 78% by December.
In January, Numazu experiences a moderate UV Index of 4, allowing for a burn time of around 30 minutes under direct sunlight. As the months progress, UV levels rise significantly, peaking in the summer. Notably, February sees an increase to a high index of 6, followed by a dramatic jump in March with an index of 8, categorized as very high, where your skin can start to burn in just 15 minutes. This trend continues into April and May, where the UV Index reaches up to 11, indicating extreme exposure, and a burn time reduces to just 10 minutes. After the summer months, the UV radiation starts to decline, with October's high of 7 providing a more manageable burn time of 25 minutes. As winter returns, November and December both settle back at a moderate level of 4, allowing for the longer burn time of 30 minutes, reminiscent of the sun's weaker rays in early winter. The changing UV Index throughout the year in Numazu highlights the importance of adapting sun safety measures as the intensity of sunlight fluctuates. For more detailed information, visit Numazu UV Index.
UV Risk Categories
January in Numazu, Japan, brings 189 hours of sunshine, setting the stage for a gradual increase in luminosity as the year progresses. As February unfolds, the sunlight brightens to 225 hours, heralding the anticipation of spring. March continues this delightful trend with 249 hours, while April reaches 260 hours, showcasing the burgeoning vitality of the season. The month of May peaks with 282 hours, an inviting invitation to outdoor adventures. Even in the warmer months, sunshine remains abundant, with 253 hours in June and 229 hours in July. August, however, surprises with the highest total of 285 hours, basking the region in summer's golden glow. As the year wanes, September offers 236 hours, before dropping slightly to 201 hours in October, and stabilizing around 223 hours in November and 227 hours in December. This yearly pattern illustrates a remarkable ebb and flow of sunshine, perfectly mirroring the seasonal transformations in Numazu.
In Numazu, Japan, the likelihood of sunny weather in January stands at a pleasant 58%, setting a promising tone for the winter month. Interestingly, as we transition into February, this figure climbs to 65%, indicating a trend of increasing sunshine as the season progresses. However, by March, the chances dip to 41%, marking a notable shift as spring approaches. It's fascinating to observe that while winter hints at sunny days, the subsequent months often reveal a pattern of fluctuating sunlight, with May and June experiencing some of the lowest probabilities of sunny weather at just 26% and 24% respectively. As the year unfolds, trends emerge with November and December witnessing a return to brighter days, boasting 63% and 73% chances of sunshine, painting a hopeful picture for the year-end and New Year celebrations.
In Numazu, Japan, January marks the beginning of a gradual shift in daylight duration, offering residents 10 hours of light each day. As the months progress into February and March, daylight remains steady at 10 hours, eventually increasing to 11 hours in March, hinting at the approach of spring. April brings a noticeable leap to 13 hours, further extending the sunlit days that peak in May and June at 14 hours, creating a vibrant atmosphere ideal for outdoor activities. As summer fades into autumn, daylight begins to wane, tapering to 13 hours in August and gradually diminishing to 10 hours by November. The year concludes in December with just 9 hours of daylight, emphasizing a clear trend of increased daylight during the spring and summer months while leading into shorter days as winter sets in.
In January, Numazu experiences an average wind speed of 4.2 m/s (9 mph), marking the start of the year with a noticeable breeze that sets a lively tone for the coastal city. This wind intensity is slightly lower in February, reaching 4.5 m/s (10 mph), as if the winter chill is momentarily reinvigorated. However, as the seasons transition into spring, the winds ease significantly, dipping to 2.9 m/s (7 mph) in March, then further to 2.2 m/s (5 mph) by June. The summer months see only a modest uptick, with winds at just 2.4 m/s (5 mph) in July, before rebounding slightly in the fall with 3.6 m/s (8 mph) in November. By December, the winds return to 4.0 m/s (9 mph), creating a circular rhythm that reflects the cyclical nature of weather patterns in Numazu. This data showcases not only the dynamic shifts in wind speed throughout the year but also hints at the city's unique maritime climate, where breezy Januarys give way to calmer summer days.
Weather in Numazu varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Numazu, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February weather exhibits some notable similarities and differences. Both months have an average temperature of 8°C (46°F), but January starts off slightly cooler with a minimum temperature of 0°C (32°F), whereas February has a minimum of 1°C (33°F). Precipitation increases in February, reaching 99 mm (3.9 in) over 8 days, compared to January's 71 mm (2.8 in) across 6 days. Additionally, February's humidity is marginally lower at 74%, compared to January's 76%. For more detailed weather information, you can check Numazu weather in February.
In January, the weather is relatively cool, with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 17°C (62°F) and an average of 8°C (46°F). The month experiences moderate precipitation, totaling 71 mm (2.8 in) over about 6 days, accompanied by a humidity level of 76%. In contrast, March sees a slight increase in temperatures, with minimums of 3°C (38°F), averages of 11°C (52°F), and maximums reaching 19°C (67°F). However, March is significantly wetter, experiencing 219 mm (8.6 in) of rainfall over 13 days, while humidity decreases slightly to 70%. For more details on March weather, you can check Numazu weather in March.
In January, temperatures typically range from a chilly minimum of 0°C (32°F) to a mild maximum of 17°C (62°F), with an average temperature of 8°C (46°F). The month experiences significant precipitation, totaling 71 mm (2.8 in) over about six days, while humidity remains relatively high at 76%. In contrast, April brings warmer weather with temperatures rising to a minimum of 5°C (42°F) and peaking at 22°C (72°F), resulting in an average of 14°C (57°F). However, April is notably wetter, with precipitation increasing to 226 mm (8.9 in) spread over 11 days, and humidity slightly decreasing to 74%. For more detailed information about weather conditions, you can visit Numazu weather in April.
January and May showcase distinct contrasts in weather patterns. In January, temperatures range from a chilly minimum of 0°C (32°F) to a mild maximum of 17°C (62°F), with an average of 8°C (46°F). The month experiences moderate precipitation, totaling 71 mm (2.8 in) over about 6 days, accompanied by a humidity level of 76%. In contrast, May offers a significantly warmer climate, with temperatures fluctuating between a minimum of 12°C (53°F) and a maximum of 24°C (76°F), resulting in an average of 18°C (64°F). However, this warmth comes with increased precipitation, amounting to 236 mm (9.3 in) spread over 12 days, and slightly higher humidity at 81%. For more details, you can check out Numazu weather in May.
In January, the weather is notably cooler with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 17°C (62°F), and an average of 8°C (46°F). The month sees about 71 mm (2.8 in) of precipitation over six days, accompanied by a humidity level of 76%. In contrast, June experiences much warmer temperatures, with a minimum of 16°C (62°F) and a maximum of 26°C (80°F), leading to an average temperature of 21°C (70°F). However, June also brings significant rainfall, totaling 286 mm (11.3 in) across 16 days, and boasts a higher humidity of 88%. For more details on the June weather in Numazu, you can visit Numazu weather in June.
In January, the weather is relatively mild, with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 17°C (62°F) and an average of 8°C (46°F). During this month, precipitation is moderate, totaling 71 mm (2.8 in) over about six rainy days, coupled with a humidity level of 76%. In contrast, July sees a significant rise in temperatures, with minimums starting at 19°C (67°F), averaging 24°C (76°F), and peaking at 31°C (87°F). This summer month is much wetter, with a staggering 437 mm (17.2 in) of rainfall recorded over approximately 21 days and high humidity at 93%. For more details on July weather, you can visit Numazu weather in July.
The weather in January contrasts sharply with that of August. January experiences cooler temperatures, with averages around 8°C (46°F) and a maximum of 17°C (62°F), while August boasts warmer conditions, with average temperatures reaching 26°C (80°F) and highs of 31°C (89°F). Additionally, January sees only 71 mm (2.8 in) of precipitation over about 6 days, whereas August is significantly wetter, with 223 mm (8.8 in) spread across 16 days. The humidity levels also rise from 76% in January to a steamy 90% in August, making the latter month feel much more tropical. For more details on the typical conditions during this time, visit Numazu weather in August.
January and September showcase a stark contrast in weather conditions. In January, temperatures range from a chilly minimum of 0°C (32°F) to a mild maximum of 17°C (62°F), with an average of 8°C (46°F). The month experiences about 71 mm (2.8 in) of precipitation over 6 days and a humidity level of 76%. In contrast, September sees significantly warmer temperatures, with minimums around 17°C (63°F) and maximums soaring to 30°C (85°F), yielding an average of 24°C (75°F). Precipitation in September is much higher at 242 mm (9.5 in), occurring on 17 days, along with increased humidity at 86%. For more details, you can check Numazu weather in September.
In January, the weather tends to be quite cool, with minimum temperatures dipping to around 0°C (32°F) and an average of 8°C (46°F). With only 71 mm (2.8 in) of precipitation over approximately 6 days, it feels relatively dry compared to October. In contrast, October experiences a more mild climate, with minimum temperatures starting at 13°C (55°F) and reaching an average of 19°C (67°F), peaking at a warm 27°C (81°F). However, it is also much wetter, receiving 296 mm (11.6 in) of rainfall over 16 days, resulting in higher humidity levels at 83%. For a detailed look at October weather, you can check Numazu weather in October.
In January, the weather is notably cooler with average temperatures ranging from 0°C (32°F) at night to a maximum of 17°C (62°F) during the day, while November offers a milder climate with temperatures between 6°C (43°F) and 22°C (71°F). Precipitation is generally lower in January, totaling 71 mm (2.8 in) over about 6 days, compared to November’s higher rainfall of 102 mm (4.0 in) across 10 days. Additionally, November sees slightly higher humidity levels at 80%, compared to January's 76%. For more details on the conditions during this month, you can visit Numazu weather in November.
In comparing the weather between January and December, January tends to be slightly cooler, with average temperatures ranging from a minimum of 0°C (32°F) to a maximum of 17°C (62°F). In contrast, December sees a marginally warmer average, with temperatures ranging from 1°C (35°F) to 19°C (67°F). Precipitation is also higher in December, accumulating to 84 mm (3.3 in) over 8 days compared to January's 71 mm (2.8 in) over 6 days. Additionally, humidity levels are slightly elevated in December at 78%, compared to January's 76%. For more detailed insights into December's weather, check out Numazu weather in December.
January in Numazu presents a unique climate characterized by cooler temperatures and notable humidity, setting it apart from the milder months that follow. With maximum highs only reaching around 17°C, January showcases a distinct chill, particularly in the mornings and evenings when temperatures can dip to freezing. The month also receives a moderate level of precipitation, with several rainy days creating a refreshing contrast to the dry spells experienced in late spring and summer. As a time of renewal, January’s weather encourages both locals and visitors to appreciate the serene beauty of Numazu as it transitions from the brisk embrace of winter towards the warmth of early spring. For a deeper dive into what the year-round weather looks like, check out Numazu Climate.