Last updated: August 21, 2025
September in Fukushima, Japan is marked by a dynamic climate that showcases the transition from summer to autumn. With maximum temperatures reaching up to 33°C (92°F) and an average of 20°C (68°F), the warmth remains palpable, while minimum temperatures drop to a refreshing 8°C (46°F). This month witnesses about 154 mm (6.1 in) of precipitation over 14 days, contributing to the region's lush landscapes. The air is thick with humidity, averaging around 84%, creating a muggy atmosphere that can surprise visitors. Overall, September’s weather in Fukushima is a blend of warmth and moisture, making it a unique experience for locals and travelers alike.
In September, temperatures in Fukushima, Japan begin to reflect the subtle transition from summer to autumn. With a minimum of 8°C (46°F) and an average of 20°C (68°F), the weather offers a comfortable warmth, perfect for outdoor activities before the cooler months set in. The gentle rise in the maximum temperature to 33°C (92°F) signals the tail end of summer's influence, providing pleasantly warm days that linger just before autumn takes hold. This month acts as a bridge, blending the heat of summer with the crispness of fall, showcasing the region's diverse climatic offerings. As nature begins to shift, the scenery transforms, inviting both locals and visitors to enjoy the last bursts of warmth amid the early signs of seasonal change.
In September, Fukushima experiences a notable shift in its precipitation patterns, with 154 mm (6.1 in) of rain falling over 14 days. This month marks a continuation of the wetter summer season, reflecting a drop from the peak rainfall of August's 169 mm (6.7 in) but still well above the lower levels seen earlier in the year. Following the heavy rains of July, where 248 mm (9.7 in) graced the region, September's precipitation indicates a gradual transition towards the drier months ahead. The consistent rainfall during late summer highlights the region's dynamic climate, with September serving as a bridge between the lush, wet months and the subsequent drop in precipitation as autumn approaches. As October sets in, 207 mm (8.2 in) is expected, hinting at a potential resurgence in rainfall before the year ends.
As summer transitions into autumn, September in Fukushima, Japan, experiences a notable shift in humidity, averaging 84%—a slight decrease from the summer’s peak but still relatively high. This month showcases a gradual decline from the sweltering 92% humidity recorded in July and 90% in August, reflecting the onset of cooler temperatures. Overall, September sits comfortably above the year's early months, where humidity levels hovered in the mid-70s. The persistent moisture in the air during this time provides a lush backdrop against the backdrop of changing foliage, inviting both residents and visitors to appreciate the beauty of the season while preparing for the drier months ahead.
As summer fades into autumn in Fukushima, Japan, the UV Index begins to decline, but September still holds onto a very high UV Index of 9, with a burn time of just 15 minutes. This marks a transition period, dropping from the peak extreme levels observed during the summer months, where the UV Index reached 11. Residents and visitors alike should remain vigilant, as the sun can still pose a significant threat to skin health. With a notable reduction in exposure risk as the months shift towards cooler temperatures, October will bring a further decrease to a high UV Index of 6. It's important to stay informed and protect your skin, especially in September. For more details, check the Fukushima UV Index.
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In September, Fukushima basks in the gentle embrace of 237 hours of sunshine, marking a subtle transition from the vibrant summer months. Following a peak in August with 280 hours, the days continue to be bright but begin to wane as autumn approaches. This slight decline reflects a typical pattern as the year progresses, with sunshine hours gradually decreasing from the heights of May and June. Despite the drop, September's sunshine still outshines the earlier months of the year, offering a warm farewell to summer and a picturesque backdrop for the onset of fall's colorful foliage.
In Fukushima, Japan, the likelihood of sunny weather experiences some fluctuations throughout the year. As we transition into September, the chance of clear skies rests at 25%, aligning closely with the sunniest months of July and August, which hover around similar percentages. This downturn in sunshine can be attributed to the approaching autumn, where cloud cover begins to increase. Interestingly, the prospects for sunny days take a notable upswing in the following months, with November reaching a 50% chance of sunshine, suggesting that while September may be somewhat overcast, the sun soon graces the region with greater frequency again.
In Fukushima, Japan, the daylight duration experiences a gradual ebb and flow throughout the year, reflecting the changing seasons. This pattern begins in January with just 9 hours of light, which steadily increases through February and March, peaking at 14 hours in the glorious months of May, June, and July. As summer gives way to autumn, daylight begins to wane, with September boasting 12 hours, a gentle reminder of shorter days ahead. By October, daylight declines further, reaching 11 hours, before settling into the deeper shadows of winter with 10 hours in November and just 9 hours again in December. This cyclical transformation not only marks the passage of time but also enhances the distinct beauty of each season in Fukushima.
As September arrives in Fukushima, Japan, the winds whisper a gentle lull, with an average speed of 1.9 m/s (4 mph). This marks a continuation of the slower breezes experienced during the summer months, where July and August saw even milder winds of 1.6 m/s (4 mph) and 2.0 m/s (4 mph), respectively. The transition into autumn brings a slight uptick as the region prepares for the more active wind patterns of October. Observing the trends throughout the year, one can notice a gradual increase in wind speed from the early months, peaking around February at 3.6 m/s (8 mph) before settling into the calmer conditions of late summer and early fall. This rhythmic cycle highlights September as a time for reflection amidst the soothing embrace of the softening winds.
Weather in Fukushima varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Fukushima, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather patterns. In September, temperatures range significantly from a cool minimum of 8°C (46°F) to a warm maximum of 33°C (92°F), with an average around 20°C (68°F). The month also experiences substantial precipitation, totaling 154 mm (6.1 in) over about 14 days, accompanied by high humidity levels at 84%. In contrast, January sees much colder temperatures, with a minimum of -13°C (9°F) and a maximum of only 10°C (50°F), averaging -1°C (31°F). Precipitation drops to 62 mm (2.4 in) across approximately 13 days, and humidity is lower at 76%. For more detailed insights on January weather, you can visit Fukushima weather in January.
September and February showcase stark contrasts in weather. In September, temperatures range from a minimum of 8°C (46°F) to a maximum of 33°C (92°F), creating a warm and humid environment with an average of 20°C (68°F). However, this month also brings considerable rainfall, with 154 mm (6.1 in) of precipitation spread over 14 days, resulting in an humidity level of 84%. In contrast, February experiences much colder conditions, with temperatures dropping to a minimum of -10°C (14°F) and a maximum of 16°C (60°F); the average temperature sits at just 1°C (33°F). This winter month sees a significant decrease in precipitation, totaling only 52 mm (2.0 in) across 12 days and lower humidity levels of 75%. For more detailed information on February weather, visit Fukushima weather in February.
In comparing the weather between September and March, notable differences emerge. September enjoys warmer temperatures, with averages around 20°C (68°F) and peaks reaching as high as 33°C (92°F), while March is notably chillier, averaging only 5°C (41°F) with maximums of 21°C (69°F). Precipitation is more abundant in September, totaling 154 mm (6.1 in) over 14 days, compared to March's 112 mm (4.4 in) over 13 days. Additionally, September experiences higher humidity levels at 84%, compared to March's 72%. For a more detailed look at the climate in March, you can check out Fukushima weather in March.
September and April weather present distinct contrasts in temperature and precipitation patterns. September boasts warmer temperatures, with averages around 20°C (68°F) and highs reaching up to 33°C (92°F), while April is cooler, averaging only 10°C (50°F) and maxing at 27°C (80°F). In terms of precipitation, September experiences more rain, totaling 154 mm (6.1 in) over 14 days, compared to April's 106 mm (4.2 in) over 13 days. Additionally, September is characterized by higher humidity at 84%, whereas April has a more comfortable humidity level of 73%. For more detailed information, you can check Fukushima weather in April.
In September, temperatures can reach a high of 33°C (92°F), making it noticeably warmer than May, where the maximum is 31°C (88°F). The average temperature in September is also higher at 20°C (68°F) compared to May's average of 16°C (60°F). However, September experiences more precipitation, with 154 mm (6.1 in) falling over 14 days, while May sees only 113 mm (4.5 in) during the same number of days. Additionally, humidity is slightly higher in September at 84%, compared to 80% in May. For a more detailed examination of May weather in the region, check out Fukushima weather in May.
In comparing the weather of September and June, both months exhibit similar minimum temperatures of 8°C (46°F), but September holds a slight edge in average and maximum temperatures, with averages around 20°C (68°F) and maxes reaching 33°C (92°F) compared to June's average of 19°C (66°F) and maximum of 31°C (89°F). Precipitation in September is higher, totaling 154 mm (6.1 in) over 14 days, while June sees 109 mm (4.3 in) also across 14 days. Humidity levels are relatively close, with September at 84% and June slightly higher at 87%. For more detailed information, you can check out Fukushima weather in June.
When comparing the weather in September and July, September tends to be cooler with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 33°C (92°F), averaging around 20°C (68°F). In contrast, July is warmer, featuring a minimum of 15°C (59°F) and a maximum of 34°C (93°F), with an average temperature of 23°C (74°F). Precipitation levels also differ, as September experiences 154 mm over 14 days, while July sees more rainfall at 248 mm across 20 days. Additionally, September has a humidity level of 84%, slightly less than July's 92%. For more detailed insights on July weather, you can visit Fukushima weather in July.
In comparing the weather between September and August, September generally presents cooler temperatures, with a minimum of 8°C (46°F) compared to August's minimum of 14°C (57°F). The average temperature in September is 20°C (68°F), which is noticeably lower than August's 24°C (76°F), while the maximum temperature in September reaches 33°C (92°F), slightly lower than August's peak of 35°C (95°F). Precipitation in September is 154 mm (6.1 in) over 14 days, making it slightly less wet than August, which experienced 169 mm (6.7 in) across 19 days. Additionally, humidity levels are high in both months, with September at 84% and August at 90%. For more detailed insights into August weather, you can visit Fukushima weather in August.
In comparing the weather of September and October, September features a wider temperature range with minimums of 8°C (46°F) and maximums reaching up to 33°C (92°F), contributing to a comfortable average of 20°C (68°F). The month experiences substantial rainfall, totaling 154 mm (6.1 in) across 14 days, with humidity levels at a high 84%. In contrast, October marks a significant drop in temperatures, with minimums plummeting to 2°C (36°F) and an average of 14°C (58°F), though maximum temperatures remain mild at 27°C (82°F). Rainfall increases to 207 mm (8.2 in), though it occurs over fewer days (12), and humidity decreases slightly to 80%. For more specifics on October weather, you can check Fukushima weather in October.
September typically exhibits warmer weather compared to November, with temperatures ranging from a minimum of 8°C (46°F) to a comfortable average of 20°C (68°F) and highs reaching up to 33°C (92°F). In contrast, November's temperatures drop significantly, showcasing a minimum of -3°C (27°F) and an average of only 8°C (47°F), with a maximum of 21°C (70°F). Additionally, September is notably wetter, with 154 mm (6.1 in) of precipitation over 14 days, while November sees just 38 mm (1.5 in) across 8 days. The humidity also decreases slightly, with September at 84% and November at 77%. For more detailed information on November weather, check out Fukushima weather in November.
September and December exhibit striking contrasts in weather patterns. In September, temperatures range from a minimum of 8°C (46°F) to a maximum of 33°C (92°F), providing an average of 20°C (68°F). The month is characterized by high humidity at 84% and significant rainfall, with 154 mm (6.1 in) spread over 14 days. In contrast, December sees much colder conditions, with temperatures dropping to a minimum of -7°C (20°F) and only reaching a maximum of 17°C (63°F), yielding an average of just 2°C (36°F). Precipitation also decreases significantly to 68 mm (2.7 in) over 15 days, and humidity is lower at 77%. For more details on the December climate, you can visit Fukushima weather in December.
September in Fukushima brings a notable shift in weather, blending the warmth of summer with the early hints of autumn. The maximum temperatures still reach a balmy 33°C, but the average cools to around 20°C, offering a refreshing reprieve from the peak heat of previous months. With 154 mm of rain spread over 14 rainy days, this month is significantly wetter, wrapping the landscape in lush greenery and invigorating the atmosphere. Coupled with a humidity level of 84%, the air feels more substantial, creating a unique ambiance that sets September apart from the drier, hotter months that precede it. To delve deeper into Fukushima's climatic variations, explore Fukushima Climate.