Last updated: August 21, 2025
In Katsuura, Japan, September ushers in a blend of warm and humid conditions, with maximum temperatures peaking at a sweltering 33°C (91°F) and averaging around 24°C (76°F). The month experiences a notable minimum temperature of 16°C (62°F), providing cooler relief amidst the heat. With a hefty precipitation total of 196 mm (7.7 in) over approximately 17 rainy days, local humidity remains high at 83%, creating a distinctly tropical atmosphere. Visitors can expect vibrant greens and lush landscapes, making it a captivating time to experience the beauty of Katsuura amid its fluctuating climate.
September in Katsuura, Japan, marks a transition into late summer with pleasantly warm temperatures. The month welcomes daily highs averaging 33°C (91°F), with nighttime lows staying comfortable at around 16°C (62°F). This balmy climate offers an ideal backdrop for outdoor activities, as the humidity from the preceding months begins to ease. With an average temperature of 24°C (76°F), September represents a peak in warmth before the cooler temperatures of autumn set in, making it a perfect time for visitors to enjoy the vibrant scenery and cultural experiences that Katsuura has to offer.
In Katsuura, Japan, September marks a notable peak in precipitation, with 196 mm (or 7.7 inches) of rain falling over 17 days. This considerable rainfall is part of the transition from summer to autumn, contributing to the lush landscape that characterizes the region. Interestingly, the pattern of increased rainfall continues from the significantly wet months of July and August, where totals reached 207 mm and 121 mm, respectively. As the year progresses into October, Katsuura experiences even higher precipitation, averaging 274 mm. This trend highlights a seasonal shift, where rainfall intensifies before tapering off in the later months, creating a dynamic climate tapestry that supports the area's vibrant ecology.
In Katsuura, Japan, September marks a subtle shift in humidity as the summer heat begins to wane. With an average humidity of 83%, the month sits slightly lower than the peak levels seen in July (94%) but remains quite high, reflecting the lingering warmth of summer. The trend of increasing humidity from the beginning of the year reaches its zenith during the sweltering summer months, particularly in June and July, before gradually tapering off in the fall. As autumn approaches, humidity levels continue to decrease, foreshadowing the drier months ahead, with October dropping to 78%. This gradual change creates a comfortable transition, making September an ideal time to enjoy Katsuura's beautiful coastal landscapes.
As the summer sun begins to wane in September, Katsuura experiences a very high UV Index of 10, a slight decrease from the peak extremes of the summer months. This transition encourages residents and visitors alike to remain vigilant, as the recommended burn time remains a brisk 15 minutes. Despite the shift towards cooler months, it's important to maintain sun safety practices, particularly in early autumn when the sun's rays can still be intense. Looking ahead, the UV Index will continue to drop, signaling a more moderate exposure risk in October. For comprehensive details on Katsuura's UV trends throughout the year, visit Katsuura UV Index.
UV Risk Categories
In Katsuura, Japan, September marks a gentle transition, showcasing 244 hours of sunshine that reflects the ebbing warmth of summer. Following the peak of 310 hours in August, the sun's embrace softens, heralding the arrival of autumn. This shift is part of a larger trend; although the days start to shorten, they still provide substantial daylight compared to early winter months like October, which enjoys only 211 hours. The steady decline from the sun-drenched peak of summer through the brisk fall amplifies the vibrant hues of the changing leaves, making September an enchanting time to experience Katsuura’s natural beauty.
In Katsuura, Japan, the likelihood of sunny weather takes an interesting turn through the year, especially as we move into September, where the chances of sunshine dip to 29%. This marks a notable decline from the height of summer; both July and August hover around 36% and 38%, respectively, offering more frequent sunny breaks. As autumn approaches, the trend seems to favor a gradual recovery, with October seeing a rise back to 45%, while later months like November and December promise even brighter skies. Thus, September stands as a transitional month, hinting at the shifting seasons while still holding the promise of sunnier days ahead.
As summer wanes in September, Katsuura, Japan, enjoys the gradual transition towards autumn with 12 hours of daylight. This marks a slight decline from the peak summer months, where daylight hours reached a generous 14 hours in June, July, and August. Following the vibrant bursts of daylight experienced in late spring and summer, September offers a gentle tapering of light, hinting at the shorter days ahead in October and November when daylight returns to 11 and 10 hours, respectively. This seasonal ebb and flow reflect the unique rhythms of nature, inviting residents and visitors alike to embrace the changing atmosphere as they prepare for cooler, cozier days.
As September rolls into Katsuura, Japan, the gentle caress of the wind continues to usher in a soothing transition from summer to autumn. With an average wind speed of 3.9 m/s (9 mph), the breezy conditions in September reflect a slight dip from the summer highs, yet still maintain a pleasant dynamism. Notably, while July and August experienced lower wind speeds, September showcases a subtle resurgence, bridging the gap between the summer's warm embrace and the impending crispness of fall. This pattern reveals an interesting rhythm in Katsuura's climate: calmness of summer months yielding to a refreshing breeze, setting the stage for the serene beauty that autumn in Japan is celebrated for.
Weather in Katsuura varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Katsuura, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January display stark contrasts in weather. In September, temperatures range from a minimum of 16°C (62°F) to a maximum of 33°C (91°F), with an average of 24°C (76°F). The month is characterized by high humidity (83%) and considerable rainfall, accumulating 196 mm (7.7 in) over 17 days. In contrast, January sees much cooler conditions, with temperatures dipping to a minimum of 0°C (31°F) and averaging around 7°C (46°F), peaking at 18°C (65°F). Precipitation in January is significantly lower at 65 mm (2.6 in) over just 6 days, and humidity sits at a more comfortable 70%. For more details on January weather, you can check Katsuura weather in January.
When comparing the weather in September and February, significant contrasts emerge. September boasts warmer temperatures, with a minimum of 16°C (62°F) and a maximum of 33°C (91°F), averaging around 24°C (76°F). However, it is also characterized by high humidity at 83% and considerable precipitation, reaching 196 mm (7.7 in) over 17 days. In stark contrast, February experiences much cooler conditions, with temperatures ranging from a minimum of 0°C (33°F) to a maximum of 19°C (66°F), averaging only 8°C (47°F). Precipitation is less frequent and lighter, with total rainfall of 57 mm (2.3 in) across 9 days, and lower humidity at 69%. For more detailed information on February weather, you can visit Katsuura weather in February.
In September, the weather is typically warm and humid, with average temperatures ranging from a minimum of 16°C (62°F) to a maximum of 33°C (91°F), and high humidity at 83%. This month also experiences significant rainfall, with 196 mm (7.7 in) occurring over 17 days. In contrast, March offers a much cooler climate, featuring average temperatures between 2°C (37°F) and 21°C (69°F) and lower humidity at 68%. Additionally, March sees less precipitation at 163 mm (6.4 in) over 14 days, making it feel drier compared to September. For more specific details about March weather, you can check Katsuura weather in March.
In September, temperatures tend to be quite warm, with daily averages hovering around 24°C (76°F) and maximums reaching as high as 33°C (91°F). However, this month is also characterized by high humidity at 83% and considerable rainfall, accumulating to 196 mm (7.7 in) over 17 days. In contrast, April presents a much cooler climate, where temperatures range from a minimum of 4°C (40°F) to an average of 15°C (59°F), with maximums reaching up to 23°C (74°F). Rainfall is less frequent in April, with 112 mm (4.4 in) spread over just 10 days and lower humidity at 73%. For more detailed information, check out Katsuura weather in April.
September generally offers warmer temperatures compared to May, with a range from a minimum of 16°C (62°F) and an average of 24°C (76°F) to a maximum of 33°C (91°F). In contrast, May sees cooler temperatures, with a minimum of 11°C (52°F) and an average of 19°C (67°F), peaking at 28°C (82°F). Additionally, September tends to be wetter, averaging 196 mm (7.7 in) of precipitation over 17 days, while May has less rain, totaling 135 mm (5.3 in) over 12 days. Notably, September's humidity is slightly higher at 83%, compared to May's 81%. For more detailed insights, you can check Katsuura weather in May.
In comparing the weather of September and June, both months present mild minimum temperatures around 16°C (61-62°F), but September typically enjoys warmer average highs of 24°C (76°F) compared to June's 22°C (72°F). While June experiences slightly less precipitation at 185 mm (7.3 in), September sees a bit more rain at 196 mm (7.7 in), over a few more days—17 in September versus 15 in June. Additionally, humidity levels are higher in June at 88%, slightly elevated from September's 83%, contributing to a somewhat more humid atmosphere. For more specific insights into conditions during June, you can refer to Katsuura weather in June.
September and July in Katsuura exhibit fairly similar weather patterns, yet they each possess distinct characteristics. In July, temperatures range from a minimum of 19°C (67°F) to a maximum of 34°C (93°F), with an average of 26°C (78°F) and higher humidity at 94%. Precipitation is slightly elevated, totaling 207 mm (8.2 in) over 17 days. In contrast, September sees slightly cooler temperatures, with minimums of 16°C (62°F) and maximums of 33°C (91°F), averaging 24°C (76°F). Although September experiences a total precipitation of 196 mm (7.7 in) over the same number of days, it has a lower humidity level of 83%. This slight drop in temperature and humidity makes September feel more comfortable compared to the hotter, more humid July. For those interested in exploring July weather in greater detail, check out this link: Katsuura weather in July.
September's weather shows a notable shift compared to August. While average temperatures in September range from a minimum of 16°C (62°F) to a maximum of 33°C (91°F), August maintains warmer conditions with minimums of 21°C (70°F) and maximums reaching 34°C (94°F). Additionally, September experiences increased rainfall with 196 mm (7.7 in) over 17 days, compared to August's 121 mm (4.7 in) over 15 days. Humidity levels in September are slightly lower at 83%, while August is more humid at 87%. For a detailed look at August's weather, you can visit Katsuura weather in August.
September's weather is characterized by warmer temperatures, with daily averages reaching up to 24°C (76°F) and maximums soaring to 33°C (91°F). The month is also quite humid, with an average humidity of 83% and a total precipitation of 196 mm (7.7 in) over 17 rainy days. In contrast, October sees a notable drop in temperatures, with averages around 20°C (68°F) and maximums peaking at 28°C (83°F). Although temperatures are milder, October experiences increased precipitation, totaling 274 mm (10.8 in) across 15 days. Humidity remains relatively high at 78%. For more detailed information, check out Katsuura weather in October.
September and November exhibit significantly different weather patterns. In September, temperatures range from a minimum of 16°C (62°F) to a maximum of 33°C (91°F), with an average of 24°C (76°F). The month is marked by high humidity at 83% and considerable rainfall, totaling 196 mm (7.7 in) over 17 days. In stark contrast, November sees cooler temperatures, with a minimum of 5°C (42°F), an average of 15°C (60°F), and a maximum of 23°C (74°F). Rainfall decreases to 122 mm (4.8 in) across 11 days, accompanied by lower humidity at 74%. For a more detailed look at the weather in this month, you can explore Katsuura weather in November.
September and December present a stark contrast in weather conditions. In September, temperatures range from a mild minimum of 16°C (62°F) to a sweltering maximum of 33°C (91°F), with an average of 24°C (76°F). The month is notably humid, with an average humidity of 83% and considerable rainfall totaling 196 mm (7.7 in) over 17 days. On the other hand, December brings a chill, with temperatures ranging from a low of 1°C (33°F) to a high of 22°C (71°F), averaging only 10°C (51°F). The precipitation decreases significantly to 87 mm (3.4 in) over just 9 days, and humidity drops to 72%. For a more detailed look at December weather, visit Katsuura weather in December.
As September unfolds in Katsuura, the weather presents a unique transition from the sweltering summer heat. The average temperature of 24°C (76°F) offers a welcome respite, marking a departure from the peak summer months. With maximum temperatures still soaring up to 33°C (91°F), the warmth lingers, but the overall feel is tempered by increased humidity at 83%. Rain becomes more frequent, with significant precipitation recorded over 17 days, contributing to a consistently damp atmosphere. This mix of warmth and moisture sets September apart, making it a month where the remnants of summer blend with the promise of the cooler autumn days ahead. For a deeper look into Katsuura's year-round weather patterns, explore Katsuura Climate.