Last updated: August 21, 2025
In September, Oarai, Japan experiences a delightful mix of warm temperatures and high humidity, making it a vibrant time to visit. With maximum temperatures reaching 32°C (90°F) and an average of 23°C (74°F), visitors can enjoy the pleasant daytime weather. However, nights cool down to a minimum of 15°C (60°F), providing a comfortable respite. This month also sees significant rainfall, with a total precipitation of 176 mm (6.9 in) spread across 17 days, ensuring the lush landscapes remain vibrant and green. Humidity levels hover around 84%, contributing to the refreshing coastal environment that Oarai is renowned for.
September in Oarai, Japan, marks a delightful transition into autumn, showcasing pleasant temperatures that invite outdoor adventures. With a minimum of 15°C (60°F) and an average of 23°C (74°F), the weather is comfortably warm, perfect for enjoying the stunning coastal scenery. The maximum temperature can soar to 32°C (90°F), reminding visitors of the lingering summer warmth. As the month progresses, the gradually cooling evenings usher in a crispness that hints at the changing seasons ahead. Overall, September strikes a delightful balance, making it an ideal time to explore Oarai's natural beauty before the chill of autumn sets in.
September brings a significant uptick in precipitation to Oarai, Japan, totaling 176 mm (6.9 in) over 17 days of rain. As summer transitions into autumn, this month represents a peak in moisture, contrasting with the drier summer months of July and August. The rainfall in September paves the way for October, which is even wetter, indicating a trend of increasing precipitation as the seasons shift. This month prepares the landscape for the vivid autumn hues while continuing the pattern of fluctuating rainfall that Oarai experiences throughout the year.
In September, Oarai, Japan, experiences a noteworthy shift in humidity, with levels averaging 84%. This marks a slight decrease from the peak months of July and August, which boast humidity rates of 92% and 90%, respectively. The summer's high humidity gradually diminishes as the region transitions into autumn, yet it remains elevated compared to other months. Throughout the year, the humidity trend reveals a strikingly humid summer, particularly in June through August, where levels consistently hover in the 80s and 90s percentile. As September rolls in, while not as oppressive, the humidity continues to linger, setting the stage for a more comfortable fall ahead.
September in Oarai, Japan, sees a UV Index of 9, falling into the very high exposure category, which means sun protection is essential. This month's UV levels closely follow the extreme conditions experienced in the peak summer months of June and July, where the index climbed to a maximum of 11. As summer transitions into autumn, the burn time remains notably short at 15 minutes, emphasizing the importance of being vigilant even as temperatures begin to cool. This trend of high UV levels throughout summer and into early fall indicates that while the risk of sunburn decreases slightly, protective measures should still be a priority. For more details, check out the comprehensive UV Index information for Oarai here: Oarai UV Index.
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In Oarai, Japan, September brings a delightful mix of sunshine and warmth, basking in approximately 240 hours of sunlight. This marks a slight dip from the sun-soaked days of August, which boasts the year's peak at 288 hours. As summer gently transitions to autumn, September maintains a significant amount of daylight, comparable to the energetic spring months of April and May. The data reveals a seasonal trend where the sun’s presence gradually wanes as the year progresses, yet September stands out for retaining a healthy glow, inviting locals and visitors alike to enjoy the late summer atmosphere before the shorter days of October set in.
As September rolls in, Oarai, Japan, experiences a notable decline in sunny weather, with only a 28% chance of sunshine. This trend marks a departure from the sunnier summer months, such as July and August, which hover around 33% and 34%, respectively. Following the vibrant energy of summer, the region prepares for the transition into autumn, where the likelihood of clear skies dips further, reflecting the changing seasons. Notably, October begins to improve slightly at 47%, hinting at the eventual return of clearer days as the year progresses. Overall, while September may not offer the sunniest weather, it serves as a gentle reminder of the shift toward the cozier months ahead.
As September arrives in Oarai, Japan, daylight begins to gently wane, providing approximately 12 hours of sunlight each day. This marks a shift from the peak summer months when daylight stretched to a generous 14 hours in June, July, and August. Following the vibrant energy of summer, September serves as a transitional month, where daylight gradually decreases. After reaching the height of 14 hours in May, the sun's retreat signals the impending arrival of autumn. In the coming months, the daylight will continue to diminish, with October offering 11 hours and November only 10 hours, as Oarai prepares for the colder days ahead.
In Oarai, Japan, the September winds pick up slightly, averaging 4.2 m/s (9 mph), which is a refreshing change after the quieter summer months. This gentle increase heralds the transition from the heat of summer to the cooler embrace of autumn. Over the months, a discernible trend emerges: while the winter and early spring months see consistent wind speeds hovering around 4.3 m/s, they gradually decline to their annual low in July with just 3.0 m/s. As the seasons shift, September stands out as a marker of renewal, with winds that invigorate the coastal landscape and prepare it for the briskness of fall. This rhythm of wind patterns not only reflects the changing seasons but also enhances the unique charm of living in Oarai.
Weather in Oarai varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Oarai, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present strikingly contrasting weather conditions. In September, temperatures range from a minimum of 15°C (60°F) to a maximum of 32°C (90°F), with an average of 23°C (74°F). This month is characterized by high humidity at 84% and frequent rainfall, accumulating 176 mm (6.9 in) over 17 days. In contrast, January experiences much colder temperatures, with a low of -3°C (27°F) and a high of only 15°C (60°F), averaging just 6°C (43°F). The winter month is drier, with only 53 mm (2.1 in) of precipitation over 6 days and a slightly lower humidity of 76%. For more detailed insights into January weather, you can check Oarai weather in January.
September and February present distinct weather contrasts. In September, temperatures are warm, ranging from a comfortable minimum of 15°C (60°F) to a maximum of 32°C (90°F), with an average of 23°C (74°F). The month experiences significant rainfall, totaling 176 mm (6.9 in) over approximately 17 days, accompanied by high humidity at 84%. In contrast, February is chilly, with temperatures dipping as low as -1°C (30°F) and averaging just 6°C (44°F), reaching a maximum of 18°C (65°F). Precipitation is much lower in February, at 50 mm (2.0 in) spread over 8 days and with humidity at a more moderate 75%. For a closer look at what to expect during this winter month, check out Oarai weather in February.
September typically boasts warmer temperatures, with a minimum of 15°C (60°F) and an average high of 32°C (90°F), making it a much hotter month compared to March, which sees a minimum of 0°C (33°F) and an average high of only 20°C (69°F). Additionally, March experiences less precipitation, with around 150 mm (5.9 in) falling across 11 days, while September is considerably wetter, accumulating 176 mm (6.9 in) over 17 days. Humidity levels are also higher in September at 84%, compared to March's 72%, contributing to a distinctly different feel in the air during these months. For more details on March weather, you can check Oarai weather in March.
September and April present contrasting weather patterns. In September, temperatures range from a minimum of 15°C (60°F) to a maximum of 32°C (90°F), with an average of 23°C (74°F). The month is quite humid, with an average humidity of 84% and 176 mm (6.9 in) of precipitation spread over 17 days. In contrast, April experiences much cooler temperatures, with a minimum of 3°C (37°F) and a maximum of 23°C (74°F), averaging at 13°C (56°F). Precipitation in April is lower, totaling 129 mm (5.1 in) over just 11 days, and humidity is also lower at 73%. For more detailed information, you can check Oarai weather in April.
September and May present distinct differences in weather patterns. In September, temperatures range from a minimum of 15°C (60°F) to a maximum of 32°C (90°F), with an average of 23°C (74°F), making it considerably warmer than May, which sees temperatures ranging from 9°C (49°F) to 27°C (82°F) with an average of 18°C (65°F). September also experiences higher precipitation levels, accumulating 176 mm (6.9 in) over 17 days, while May has less rain at 143 mm (5.6 in) across 12 days. Additionally, September's humidity is slightly higher at 84%, compared to May's 80%. For more details on May's weather, visit Oarai weather in May.
September and June exhibit similarities in temperature, with both months featuring a minimum temperature of around 15°C (60°F), but September tends to be warmer overall, averaging 23°C (74°F) compared to June's 21°C (70°F). The maximum temperatures also reflect this difference, reaching up to 32°C (90°F) in September versus 30°C (86°F) in June. Precipitation levels are slightly higher in September, accumulating to 176 mm (6.9 in) over 17 days, compared to 155 mm (6.1 in) over 14 days in June. Humidity is consistently high in both months, with September at 84% and June at 87%, making both times of year feel quite muggy. For more details on June weather, you can check Oarai weather in June.
In comparing the weather between September and July, September tends to be slightly cooler with average temperatures ranging from a minimum of 15°C (60°F) to a maximum of 32°C (90°F), while July is warmer, featuring a minimum of 19°C (66°F) and a maximum of 31°C (89°F). Despite being warmer, July also experiences higher humidity at 92% compared to September's 84%. Additionally, July has more precipitation, totaling 209 mm (8.2 in) over 19 days, whereas September sees 176 mm (6.9 in) spread across 17 days. For further details on July weather, you can visit Oarai weather in July.
In comparing the weather of September and August, September tends to be slightly cooler, with average temperatures dropping from 26°C (80°F) in August to 23°C (74°F) in September. While the maximum temperature in September reaches 32°C (90°F), it is still a bit more bearable than August's peak of 33°C (92°F). However, September experiences increased rainfall, with 176 mm (6.9 in) of precipitation over 17 days, compared to August's 109 mm (4.3 in) over just 13 days. Humidity levels are also high in both months, though September's humidity is 84% compared to August's 90%. For more detailed information on August weather, you can visit Oarai weather in August.
September typically presents warmer conditions with an average temperature of 23°C (74°F) and daytime highs reaching up to 32°C (90°F). The month is also characterized by significant rainfall, accumulating 176 mm (6.9 in) over 17 days, coupled with high humidity at 84%. In contrast, October brings cooler temperatures, averaging 19°C (66°F) with maximums of 29°C (85°F) and minimums dropping to 10°C (51°F). Rainfall increases in October to 258 mm (10.2 in), spread over 16 days, while humidity slightly decreases to 80%. For more detailed information, check out Oarai weather in October.
September's weather is characterized by warm temperatures, with minimums around 15°C (60°F) and daily averages reaching 23°C (74°F), peaking at a high of 32°C (90°F). This month also experiences significant rainfall, totaling 176 mm (6.9 in) over 17 days, paired with a high humidity level of 84%. In contrast, November sees a notable drop in temperatures, with minimums of 4°C (39°F) and an average of 14°C (57°F), rising to a maximum of 22°C (72°F). Precipitation decreases to 102 mm (4.0 in) over just 10 days, along with a reduction in humidity to 77%. For more details, visit Oarai weather in November.
In September, the weather is noticeably warm, with temperatures ranging from a minimum of 15°C (60°F) to a maximum of 32°C (90°F) and an average of 23°C (74°F). The month is characterized by high humidity at 84% and significant rainfall, with 176 mm (6.9 in) of precipitation over 17 days. In contrast, December's climate is much cooler, with temperatures dropping to a minimum of 0°C (33°F) and reaching a maximum of 20°C (68°F), averaging just 8°C (47°F). This month sees significantly less rainfall, totaling 73 mm (2.9 in) across only 8 days, and the humidity is lower at 77%. For further insights into December weather patterns, check out Oarai weather in December.
As September unfolds in Oarai, it brings a unique blend of warmth and humidity, setting it apart from the preceding summer months. The temperatures remain pleasantly high, with daytime highs reaching a notable peak, while evenings gradually cool down, offering a comfortable respite. However, this month is also characterized by increased rainfall, with a significant number of precipitation days contributing to the lush, green landscape. The high humidity, often lingering at around 84%, adds to the tropical feel of the season. This transitional period not only enhances the natural beauty of Oarai but also signals the approach of autumn, making it an intriguing time to experience the area's climate. For more insights on what to expect, check out Oarai Climate.