Weather in Japan for September 2027
In general, the average temperature in Japan at the beginning of September is 28.2 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 25.7 °C by the end of September.
The climate of Japan in September is notably wet, with an average of 15 rainy days, and a total of 250.8 mm of precipitation.
Is September a good time to visit Japan? check out the best time to travel to Japan page.
✨ Is September a good time to visit Japan? – Ask the AI Weatherman
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Japan Weather September
What’s the Weather Like in Japan This September?
Temperatures trend during September in Japan
September weather in Japan day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain | 30° /25° | 2.5 mm | 6 | |
| 2 Sept. |  Moderate or heavy rain shower | 29° /24° | 9.5 mm | 6 | |
| 3 Sept. | Moderate or heavy rain shower | 29° /24° | 9.9 mm | 5 | |
| 4 Sept. |  Moderate rain | 27° /22° | 19.1 mm | 5 | |
| 5 Sept. | Moderate rain | 28° /23° | 14.6 mm | 6 | |
| 6 Sept. | Moderate rain | 28° /24° | 10.4 mm | 6 | |
| 7 Sept. | Moderate rain | 29° /24° | 17.1 mm | 6 | |
| 8 Sept. |  Heavy rain | 28° /23° | 26.5 mm | 5 | |
| 9 Sept. | Moderate rain | 29° /23° | 13.1 mm | 6 | |
| 10 Sept. | Light rain | 29° /23° | 4.4 mm | 6 | |
| 11 Sept. | Light rain | 27° /23° | 6.5 mm | 6 | |
| 12 Sept. | Light rain | 28° /23° | 4.5 mm | 6 | |
| 13 Sept. |  Patchy rain possible | 29° /24° | 0.3 mm | 6 | |
| 14 Sept. | Patchy rain possible | 30° /24° | 0.7 mm | 7 | |
| 15 Sept. | Light rain | 29° /24° | 3 mm | 6 | |
| 16 Sept. | Moderate rain | 27° /23° | 10 mm | 6 | |
| 17 Sept. | Light rain | 28° /23° | 2.7 mm | 6 | |
| 18 Sept. | Moderate or heavy rain shower | 29° /24° | 8.3 mm | 6 | |
| 19 Sept. | Light rain | 28° /24° | 7.2 mm | 6 | |
| 20 Sept. | Moderate rain | 28° /23° | 18.7 mm | 6 | |
| 21 Sept. | Moderate rain | 28° /22° | 21.3 mm | 6 | |
| 22 Sept. | Light rain | 28° /22° | 4 mm | 5 | |
| 23 Sept. | Light rain | 25° /21° | 7.1 mm | 5 | |
| 24 Sept. | Light rain | 27° /21° | 5.6 mm | 6 | |
| 25 Sept. | Patchy rain possible | 25° /20° | 1 mm | 6 | |
| 26 Sept. | Light rain | 26° /20° | 3 mm | 6 | |
| 27 Sept. | Patchy rain possible | 26° /21° | 1.9 mm | 5 | |
| 28 Sept. | Light rain | 26° /21° | 3.1 mm | 5 | |
| 29 Sept. | Light rain | 25° /21° | 8.5 mm | 5 | |
| 30 Sept. | Light rain | 25° /21° | 6.2 mm | 5 | |
| Next | |||||
Japan weather in September vs August vs October
| August | September | October | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 31°/26° | 27°/23° | 22°/17° |
| Rainfall | 176 mm | 251 mm | 130 mm |
| Wind | 22.2 km/h | 21.7 km/h | 21.1 km/h |
| Humidity | 68% | 69% | 61% |
| Rainy days | 13 days | 15 days | 12 days |
| Dry days | 18 days | 15 days | 19 days |
Planning a trip to Japan? Discover the best time to visit
Guide for Japan in September
In September, Japan experiences a transition from summer to autumn, resulting in varied weather conditions across the country. At the beginning of the month, the northern regions such as Hokkaido may still have remnants of summer with temperatures around 20° and occasional rainfall.
In contrast, central areas like Tokyo and Kyoto can expect milder temperatures around 25° with decreasing humidity, making it a pleasant time for outdoor activities and sightseeing.
Moving towards the end of September, the weather in Japan begins to cool down further. In Hokkaido, temperatures may drop to around 15° as autumn sets in, creating picturesque landscapes with the changing colors of the leaves.
In central regions, the temperatures continue to decrease to around 22°, and the skies become clearer, providing comfortable conditions for exploring the cultural and historical attractions.
Overall, September in Japan offers a transition from the warmth of summer to the crispness of autumn, making it an ideal time to experience the country's natural beauty and cultural richness.
Japan in September - FAQ
Is September a good time to visit Japan?
What are the expected maximum and minimum temperatures in Japan during September?
How much rainfall should be expected in Japan during September?
What are the typical wind conditions in Japan during September?
September rainfall patterns in Japan
UV exposure in Japan during September
What to pack to Japan in September?
Warm & sunny · highs around 27 °C, frequent showers
As you prepare for your trip to Japan in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Japan, during September, is comfortable and enjoyable, regardless of the weather conditions.