Last updated: August 21, 2025
In September, the coastal town of Kesennuma, Japan, experiences a blend of warm and inviting weather, with maximum temperatures reaching up to 32°C (90°F). The average temperature hovers around a comfortable 20°C (69°F), while the evenings can be refreshingly cool, dipping to a minimum of 8°C (46°F). This month also brings significant moisture, with a total precipitation amount of 141 mm (5.6 in) over approximately 14 rainy days, contributing to a high humidity level of 86%. Visitors can expect a vibrant yet moist climate, perfect for exploring this picturesque region.
In September, Kesennuma experiences a delightful transition from summer to autumn, with temperatures ranging from a cool 8°C (46°F) at night to a warm 32°C (90°F) during the day. The average temperature settles around 20°C (69°F), offering an inviting climate perfect for outdoor activities. This month marks a notable dip from the scorching highs of summer, yet it retains a pleasant warmth that encourages exploration. As the days begin to shorten and the leaves hint at changing colors, September serves as a perfect bridge between the balmy days of summer and the crispness of fall, creating a vibrant atmosphere for both residents and visitors alike.
In September, Kesennuma experiences a notable shift in precipitation, receiving 141 mm (5.6 in) of rain over 14 days. This marks a decrease from the previous months, which saw July and August reach peaks of 174 mm (6.8 in) and 178 mm (7.0 in) respectively. The rain during September, while still significant, indicates a transition towards the drier months ahead. As summer’s intensity wanes, the rainfall begins to taper off, setting the stage for October, which is expected to bring an even higher total of 190 mm (7.5 in). This cyclical pattern highlights the region's distinct wet seasons, showcasing the reliance on late summer rains before the fall cools the air and prepares the landscape for less frequent showers in the coming months.
In September, Kesennuma, Japan, experiences a notable shift in humidity, settling at 86%, which marks a slight decrease from the peak summer levels of 92% in both July and August. This month transitions from the high humidity typical of summer into a more moderate fall climate, yet still retains a significant amount of moisture. The year begins with relatively high humidity levels around 80%, gradually dropping to a low of 75% in April, before rising again as the summer months approach. As the seasons change, one can anticipate a gradual return to the more comfortable humidity levels seen in the autumn months, with October averaging 82%. Kesennuma's humidity trends reflect a unique rhythm of seasonal shifts, offering a rich experience for both residents and visitors alike.
In September, Kesennuma experiences a UV Index of 9, categorizing exposure as very high with a burn time of just 15 minutes. This notable decrease from the peak of UV Index 11 in June signifies a gradual reduction in solar intensity as summer transitions to autumn. However, the risk of overexposure remains significant, mirroring the intense levels recorded in the preceding months of May and July. As the days gradually shorten, it's crucial for residents and visitors alike to be mindful of sun safety practices to prevent harmful effects, especially during peak hours. For more details on the UV Index throughout the year, check out Kesennuma UV Index.
UV Risk Categories
As the warm embrace of September settles over Kesennuma, the city basks in a comfortable 246 hours of sunshine, signaling the tail end of summer. This month marks a gentle decline from the peak brightness of May with its 299 hours of sunshine, yet it remains robust compared to the earlier months of the year. The trend reveals a gradual increase in daylight from the dreary days of winter, culminating in the sun-soaked vibrancy of summer before tapering off into the cooler months. While September's sunshine may not rival the summer's heights, it still offers a splendid backdrop for enjoying the transition of the seasons, with each sunbeam hinting at the crisp autumn days to come.
In Kesennuma, Japan, the likelihood of sunny weather shows a noticeable trend as the year progresses. September sees a sun chance of 33%, which is a slight uptick from the summer months but still relatively low compared to the main sunny season. This increase reflects the gradual transition into autumn, where the weather can be more variable. Notably, the chances dip significantly during the peak of summer, with July and August offering only 20% and 23% of sunny days, respectively. As the year turns towards fall, the odds improve once again, with October rising to 41% and November boasting a healthier 57%. This suggests that while September may not be the sunniest month, it sets the stage for brighter days ahead as autumn takes hold.
As summer gives way to autumn, September in Kesennuma, Japan, witnesses a gentle decline in daylight, providing around 12 hours of sunlight each day. This marks a beautiful transition from the lush, long days of July and August, where daylight peaked at 14 hours. Following the vibrant months of spring and summer, September serves as a bridge to the cooler, shorter days of fall. The daylight duration will gradually decrease further into October, emphasizing the subtle shift in seasons. This gradual ebb in daylight not only fosters a change in the environment but also sets the stage for the serene beauty of autumn in this coastal town.
In September, the winds in Kesennuma, Japan, gently shift to an average speed of 3.0 m/s (7 mph), a subtle increase from the calmer months of July and August. This transition marks a slight resurgence compared to the summer lull, hinting at the approaching autumn breezes. Interestingly, September's winds echo the consistent patterns established earlier in the year, maintaining a breeze that lingers around the 3.0 m/s mark, reminiscent of both the spring and early autumn months. As the temperatures begin to drop, these soft winds usher in a refreshing change, offering a delightful reminder of nature's rhythmic cycles. The gradual variations in wind speeds throughout the year create a unique atmospheric tapestry that enhances Kesennuma's coastal charm.
Weather in Kesennuma varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Kesennuma, focusing on differences in temperature, rainfall, humidity, and UV levels.
September weather is characterized by warmer temperatures, with daily averages around 20°C (69°F) and peaks reaching up to 32°C (90°F). The month experiences significant rainfall, totaling 141 mm (5.6 in) over 14 days, alongside high humidity levels of 86%. In contrast, January sees much colder conditions, with average temperatures dropping to just 1°C (34°F) and nighttime lows plunging to -13°C (9°F). Precipitation is relatively low at 41 mm (1.6 in) across 8 days, and humidity is slightly lower at 80%. For more details about January weather, you can visit Kesennuma weather in January.
September and February present contrasting weather patterns. In September, temperatures range from a mild 8°C (46°F) at night to a warm average of 20°C (69°F), peaking at a hot 32°C (90°F) during the day. The month experiences significant rainfall, with 141 mm (5.6 in) spread over 14 days and high humidity levels at 86%. In stark contrast, February is much colder, with temperatures dipping to a minimum of -9°C (16°F) and averaging just 2°C (35°F), reaching a maximum of 13°C (56°F). Precipitation in February is lower at 47 mm (1.9 in) over 8 days, accompanied by a more comfortable humidity of 79%. For further details, refer to Kesennuma weather in February.
September and March showcase a stark contrast in weather patterns. September typically offers warmer temperatures, with an average of 20°C (69°F) and highs reaching up to 32°C (90°F), while March is much cooler, with an average of only 5°C (42°F) and maximums around 19°C (67°F). Precipitation is relatively high in both months, but September sees more rain, with 141 mm (5.6 in) over 14 days compared to March’s 110 mm (4.3 in) across 11 days. Additionally, September has a higher humidity level at 86%, while March enjoys a drier atmosphere at 77%. For those interested in more specifics about March weather, check out Kesennuma weather in March.
When comparing the weather in September and April, September boasts warmer temperatures, with average highs reaching 20°C (69°F) and max temperatures peaking at 32°C (90°F). In contrast, April features cooler conditions, with an average max of 24°C (76°F) and a chilly minimum of -2°C (28°F). Additionally, September experiences higher precipitation levels, totaling 141 mm (5.6 in) over 14 days, while April sees 112 mm (4.4 in) of rain over 11 days. Humidity also plays a role, with September being more humid at 86% compared to April's 75%. For more specific details about April weather, you can check this link: Kesennuma weather in April.
In comparing the weather between September and May, September presents a warmer overall climate with average temperatures reaching 20°C (69°F), compared to May's cooler average of 15°C (59°F). September experiences higher maximum temperatures, peaking at 32°C (90°F), while May's maximum is more mild at 29°C (84°F). Additionally, September is characterized by increased humidity at 86%, compared to May's 80%. Precipitation is also more frequent in September, with 141 mm (5.6 in) falling over 14 days, whereas May sees 108 mm (4.3 in) over 12 days. For more details about the weather in May, you can visit Kesennuma weather in May.
When comparing the weather in September to that of June, there are some notable differences. September typically sees a wider temperature range, with minimums dropping to 8°C (46°F) and maximums reaching up to 32°C (90°F), leading to an average temperature of 20°C (69°F). In contrast, June has slightly higher minimum temperatures at 10°C (50°F) and maximums at 29°C (85°F), resulting in a lower average of 18°C (65°F). Both months experience similar levels of precipitation, with September recording 141 mm (5.6 in) and June at 114 mm (4.5 in), although the number of rainy days remains the same at 14. Humidity levels are relatively consistent, with September at 86% and June slightly higher at 87%. For more specifics, you can check out Kesennuma weather in June.
When comparing the weather between July and September, it's clear that both months experience a similar range of maximum temperatures, peaking at 32°C (90°F). However, July tends to be warmer overall, with average temperatures around 22°C (72°F) compared to September's average of 20°C (69°F). In terms of precipitation, July sees slightly higher levels at 174 mm (6.8 in) over 17 days, while September receives 141 mm (5.6 in) across 14 days. Additionally, humidity is higher in July at 92%, compared to September's 86%, making July feel more muggy. For a detailed look at July's weather conditions, you can check out Kesennuma weather in July.
In comparing the weather between September and August, September experiences cooler temperatures, with a minimum of 8°C and an average of 20°C, whereas August remains warmer, averaging 24°C with a minimum of 13°C. While both months see high humidity levels, August has a slightly higher average at 92% compared to September's 86%. Additionally, August receives more precipitation, totaling 178 mm over 18 days, compared to September's 141 mm across 14 days. For more detailed weather information, you can check Kesennuma weather in August.
September in Kesennuma typically showcases warmer temperatures, with a minimum of 8°C (46°F) and an average high reaching 32°C (90°F). It is also a relatively wet month, experiencing about 141 mm (5.6 in) of precipitation over 14 days, accompanied by high humidity levels at 86%. In contrast, October sees a notable drop in temperatures, with a minimum of 4°C (40°F) and an average high of 27°C (81°F). While it remains humid at 82%, October experiences increased rainfall, totaling 190 mm (7.5 in) over 12 days. For more detailed information, you can check Kesennuma weather in October.
September and November exhibit striking differences in weather patterns. In September, temperatures range from a mild 8°C (46°F) at night to a warm average of 20°C (69°F), peaking at a sweltering 32°C (90°F) during the day. The month also sees significant rainfall, with 141 mm (5.6 in) falling over 14 days, contributing to a high humidity level of 86%. In contrast, November brings a noticeable chill, with temperatures dropping to a minimum of -2°C (28°F) and averaging only 9°C (48°F), while the maximum reaches a comfortable 19°C (67°F). Additionally, November experiences much less rainfall, totaling 49 mm (1.9 in) over just 6 days, resulting in a lower humidity level of 79%. For more detailed information about weather conditions in this month, check Kesennuma weather in November.
September weather is characterized by warm temperatures, with a minimum of 8°C (46°F) and an average of 20°C (69°F), reaching a maximum of 32°C (90°F). The month experiences significant rainfall, with 141 mm (5.6 in) across approximately 14 days, and high humidity levels at 86%. In contrast, December brings much cooler conditions, with temperatures dipping to a minimum of -6°C (22°F) and averaging around 3°C (38°F). The maximum temperature in December reaches 16°C (61°F), while precipitation decreases to 60 mm (2.4 in) over about 10 days, accompanied by lower humidity at 80%. For more detailed insights, check out Kesennuma weather in December.
As September unfolds in Kesennuma, the weather transitions to a unique blend of warmth and humidity that sets it apart from the rest of the year. While daytime temperatures can reach a maximum of 32°C, the evenings offer a refreshing contrast as they dip to a cooler average of 20°C. The month is also characterized by higher humidity levels at 86%, making it feel warmer than it is. Additionally, with around 141 mm of precipitation over approximately two weeks, rain becomes a frequent visitor, nurturing the lush landscapes of this coastal town. This combination of warmth, moisture, and rain makes September a lively and dynamic time in Kesennuma, distinct from the drier months that precede and follow it. For a deeper dive into the region’s overall weather patterns, explore Kesennuma Climate.