Last updated: August 21, 2025
January in Shimabara, Japan, showcases a diverse weather experience characterized by a maximum temperature reaching up to 19°C (66°F) and an average of 8°C (46°F). The chill of winter is evident with temperatures dipping to a minimum of -2°C (29°F). Rainfall is moderate, with about 53 mm (2.1 in) of precipitation over 6 days, creating a humid atmosphere with relative humidity averaging 75%. This month perfectly embodies the crisp yet temperate essence of Shimabara’s winter, inviting both adventure and tranquility amidst the scenic landscapes.
In January, Shimabara, Japan experiences a significant chill, with temperatures ranging from a brisk -2°C (29°F) at night to a more moderate 19°C (66°F) during the day. The average temperature hovers around 8°C (46°F), setting a cool tone for the month. Notably, January serves as a transition period, kicking off a gradual increase in warmth as the year progresses. In February, temperatures remain consistent, but hints of spring emerge by March, with average highs rising to 12°C (55°F). This upward trend continues into April and May, indicating a shift towards milder conditions. Thus, January marks not only a time of winter’s grip but also the very beginning of a seasonal awakening, with promise of warmth just around the corner.
In January, Shimabara experiences a relatively mild start to the year with an average precipitation of 53 mm (2.1 in), falling across just 6 days. This sets a contrast to the wetter months that follow; as the winter chill fades, February sees a noticeable uptick in rainfall, nearly doubling January's totals with 92 mm (3.6 in) over 9 days. The progression into spring brings even more rain, peaking sharply in July with an impressive 475 mm (18.7 in), the wettest month of the year. As the seasons shift, it's evident that Shimabara's climate evolves from the drier, cooler beginnings in January to the lush, rain-filled summers, highlighting a clear trend of increasing precipitation as the year progresses.
In Shimabara, Japan, January brings a humidity level of 75%, setting the stage for a winter marked by crisp air and damp coolness. As the year progresses, humidity levels share a consistent trend, starting to dip slightly to 71% in both February and March. However, the warmth of spring ignites a rise in moisture, peaking in the summer months; by July, humidity soars to a staggering 92%. This pattern reflects the climate's transition, where humid conditions linger into late summer before gradually tapering off in the fall and winter seasons. Notably, December wraps up the year with a cozy 79%, echoing the dampness that defined the start of January, illustrating the city’s rich, moist climate throughout the year.
In January, Shimabara, Japan, experiences a moderate UV Index of 4, with a recommended burn time of 30 minutes. This relatively gentle exposure provides a comfortable start to the year, setting a stark contrast to the rising UV levels in the following months. By February, the UV Index climbs to 6, indicating high exposure, and the burn time shortens to 25 minutes. March ushers in an even sharper increase, reaching a very high UV Index of 8 with only 15 minutes before sunburn can occur. As spring transitions into summer, May through August see extreme UV conditions, peaking at 12 in July and August, where just 10 minutes of exposure can lead to burns. Interestingly, the UV Index slightly declines in the fall and winter months, leveling off at 4 by December, bringing back a more moderate burn time of 30 minutes. This evolving trend highlights the importance of sun protection, especially during the extreme summer months. For detailed information on UV risks, visit Shimabara UV Index.
UV Risk Categories
In January, Shimabara, Japan, greets the new year with 180 hours of sunshine, marking the start of a gradual increase in daylight as winter wanes. As February unfolds, sunshine hours rise to 234, heralding the approach of spring. This trend continues robustly through March and April, peaking in these months with 264 hours and 282 hours, respectively, as days lengthen and bloom beckons. By May, the sunshine retreats slightly to 279 hours, followed by a gentle decline into the summer months, although July still enjoys a solid 267 hours. August shines brightly, boasting the highest total of 300 hours, perfect for summer adventures. However, as the seasons shift again, sunlight begins to taper, dropping to 257 hours in September and continuing downward through the autumn months. By December, sunlight dips to 216 hours, closing the year on a quieter note but still lighting up the picturesque landscape of Shimabara. This cycle of sunlit hours paints a vivid picture of seasonal transformation, inviting both solace and exploration throughout the year.
In Shimabara, Japan, January brings a 38% chance of sunny weather, which places it slightly lower than February's 44% likelihood but higher than both March and April. As the year progresses, the chances of sun fluctuate, with spring months showing a promising uptick; however, by the time summer arrives, the prospects decline dramatically to as low as 20%. Notably, October shines as the month with the highest chance of sun at 64%, emphasizing a seasonal shift that favors clear skies in the autumn. This trend underscores the importance of planning outdoor activities in Shimabara, especially in the late fall when sunny days prevail over the earlier winter months.
In Shimabara, Japan, January ushers in 10 hours of daylight, the shortest duration of the year, marking the beginning of a gradual increase in sunlight. As February and March unfold, daylight extends to 11 hours, hinting at the approaching warmth of spring. By the time April arrives, residents enjoy 12 hours of daylight, with May and June bringing even brighter days, peaking at a delightful 14 hours. This trend of longer days continues into July before sunlight begins to wane as summer fades. August sees a slight decrease to 13 hours, followed by a gradual decline in daylight through the fall months, with November and December returning to 10 hours. This cyclical pattern beautifully encapsulates the transition from winter's starkness to summer's abundance, reflecting the rhythmic dance of the seasons in Shimabara.
In Shimabara, Japan, January welcomes visitors with a gentle breeze, featuring an average wind speed of 3.0 m/s (7 mph), slightly lower than February's 3.1 m/s (7 mph). As winter transitions to spring, the winds gradually soften, reaching their lowest point in June at 1.6 m/s (4 mph). This calm persists through the summer months, with speeds hovering around 2.5 to 2.7 m/s (6 mph). As autumn rolls in, wind speeds exhibit a mild increase in October and November before settling back near 2.8 m/s (6 mph) in December. Overall, the trend indicates a noticeable decline in wind intensity from winter into summer, followed by a gradual rise in the later months of the year, showcasing the serene yet dynamic climatic dance of Shimabara.
Weather in Shimabara varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Shimabara, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February exhibit similar minimum temperatures, both sitting at -2°C (29°F), but February sees a slightly warmer average temperature at 8°C (48°F) compared to January's 8°C (46°F). In terms of maximum temperatures, February is notably warmer, reaching up to 22°C (71°F), whereas January peaks at 19°C (66°F). Precipitation levels also differ, with February experiencing more rain at 92 mm (3.6 in) over 9 days, compared to January's 53 mm (2.1 in) over just 6 days. The humidity is slightly lower in February at 71%, compared to 75% in January. For more detailed insights, you can check out Shimabara weather in February.
In January, the weather is generally colder, with temperatures ranging from a chilly -2°C (29°F) to a mild high of 19°C (66°F), averaging around 8°C (46°F). This month also sees about 53 mm (2.1 in) of precipitation over an average of 6 days, making it relatively dry. The humidity levels are around 75%, contributing to the crisp winter feel.
By March, the temperatures rise noticeably, with a minimum of 3°C (37°F), an average of 12°C (55°F), and a maximum reaching 24°C (76°F). However, March experiences significantly more rainfall, totaling 145 mm (5.7 in) across approximately 11 days, which contributes to a slightly lower humidity of 71%. For a detailed look at the weather conditions during this month, check out Shimabara weather in March.
In January, the weather tends to be quite cool, with minimum temperatures around -2°C (29°F) and an average of 8°C (46°F), peaking at a maximum of 19°C (66°F). There is moderate precipitation, totaling 53 mm (2.1 in) over approximately 6 days, along with a humidity level of 75%. In contrast, April brings a noticeable warming trend, with minimum temperatures rising to 5°C (41°F) and an average of 16°C (62°F), reaching a maximum of 29°C (84°F). However, April is wetter, with precipitation increasing to 135 mm (5.3 in) over 8 days and a slightly higher humidity of 78%. For more detailed weather insights specific to April, check out Shimabara weather in April.
January and May present stark contrasts in weather. In January, temperatures are considerably cooler, with a minimum of -2°C (29°F), an average of 8°C (46°F), and a maximum reaching just 19°C (66°F). The month experiences 53 mm (2.1 in) of precipitation over 6 days, accompanied by a humidity level of 75%. In contrast, May ushers in milder and more pleasant conditions, featuring a minimum temperature of 10°C (50°F) and an average of 21°C (69°F), with highs peaking at 30°C (86°F). The month is more robust in terms of rainfall, receiving 214 mm (8.4 in) over 12 days and showing a higher humidity level of 84%. For a detailed outlook on May weather, visit Shimabara weather in May.
The weather in January is notably cooler compared to June, with average temperatures ranging from a chilly 8°C (46°F) to a maximum of 19°C (66°F), while June experiences much milder temperatures, averaging 24°C (75°F) and peaking at 32°C (90°F). Precipitation patterns also differ significantly; January sees 53 mm of rain over about 6 days, whereas June is much wetter, with 262 mm of rainfall across 15 days. Additionally, humidity levels are higher in June at 86%, compared to January's 75%. For more detailed insights about the weather in Shimabara during June, check out Shimabara weather in June.
In January, the weather typically features cooler temperatures, with averages around 8°C (46°F) and maximums reaching 19°C (66°F). Humidity is relatively moderate at 75%, and the month sees about 53 mm (2.1 in) of precipitation over six days. In contrast, July brings much warmer conditions, with temperatures ranging from a minimum of 20°C (68°F) to a maximum of 37°C (99°F) and an average of 27°C (82°F). This month experiences significantly higher humidity at 92% and a substantial increase in precipitation, totaling 475 mm (18.7 in) spread over 19 days. For a closer look at what to expect during this summer month, you can check Shimabara weather in July.
In January, the weather in Shimabara is quite cool, with temperatures ranging from a minimum of -2°C (29°F) to a maximum of 19°C (66°F), averaging around 8°C (46°F). The month experiences relatively light precipitation of 53 mm (2.1 in) over about 6 days, with humidity levels at 75%, creating a crisp winter atmosphere.
In stark contrast, August brings a significant rise in temperatures, with the mercury ranging from a minimum of 20°C (68°F) to a scorching maximum of 39°C (102°F), while the average sits at 29°C (85°F). This month sees a notable increase in rainfall, totaling 303 mm (11.9 in) over 14 days, accompanied by high humidity levels of 91%, resulting in a hot and muggy summer climate. For more detailed insights, check out Shimabara weather in August.
When comparing the weather in January and September, a stark contrast emerges. January typically experiences colder temperatures, ranging from a minimum of -2°C (29°F) to an average of 8°C (46°F), with a maximum of 19°C (66°F). Precipitation during this month is relatively low, averaging 53 mm (2.1 in) over 6 days, and humidity levels are around 75%. In contrast, September brings much warmer conditions, with minimum temperatures starting at 16°C (62°F) and averaging 25°C (78°F) while peaking at a scorching 35°C (94°F). However, it is markedly wetter, receiving about 228 mm (9.0 in) of rainfall over 15 days and featuring higher humidity at 84%. For more details on September weather, check out Shimabara weather in September.
In January, the weather is characterized by cooler temperatures, with a minimum of -2°C (29°F) and an average of 8°C (46°F), peaking at a pleasant 19°C (66°F). The month sees about 53 mm (2.1 in) of precipitation over approximately 6 days, alongside a relative humidity of 75%. In striking contrast, October boasts much warmer conditions, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 33°C (91°F) and an average of 21°C (69°F). Precipitation increases significantly to 120 mm (4.7 in) over approximately 9 days, coupled with a higher humidity of 83%. The stark differences between these two months highlight the transition from winter's chill to autumn's warmth. For more specific details on October weather, you can visit Shimabara weather in October.
January and November present contrasting weather patterns. January typically features cooler temperatures, with minimums around -2°C (29°F) and an average of 8°C (46°F), while November enjoys milder conditions, starting from a minimum of 3°C (38°F) and averaging 15°C (59°F). Precipitation is slightly lower in January at 53 mm (2.1 in) compared to November’s 80 mm (3.1 in), with more rainy days as well, showing 6 days in January against 8 in November. Humidity is relatively high in both months, but November experiences a slightly higher average at 81% compared to January’s 75%. For detailed insights, you can read more about the weather trends in November here: Shimabara weather in November.
In December, Shimabara experiences a milder climate with average temperatures ranging from a minimum of 0°C (33°F) to a maximum of 24°C (76°F). In contrast, January sees cooler temperatures, with lows reaching -2°C (29°F) and highs peaking at 19°C (66°F). While both months receive a fair amount of precipitation, December is notably wetter, averaging 89 mm (3.5 in) over 7 days compared to January’s 53 mm (2.1 in) over 6 days. Additionally, humidity levels are slightly higher in December at 79%, compared to January's 75%. For a detailed look at the weather patterns, you can check Shimabara weather in December.
In January, Shimabara experiences a unique charm as the winter season takes hold. With temperatures generally cooler than the rest of the year, daytime highs are mild yet brisk, contrasting sharply with the cold nights that can dip below freezing. The elevated humidity of 75% combined with a moderate level of precipitation creates a distinct feel, often resulting in a serene, misty landscape. Compared to the warmer months, January is characterized by fewer sunny days, inviting a different kind of beauty as nature prepares for the coming spring. To explore more about the weather patterns throughout the year, visit Shimabara Climate.