Weather in Tokyo for September 2025
In general, the average temperature in Tokyo at the beginning of September is 28.3 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 26.3 °C by the end of September.
Tokyo experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 180.5 mm.
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Tokyo in September average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  29° | 2 28° | 3 27° | 4  27° | 5  29° | 6  29° | 7 29° |
| 8 27° | 9 29° | 10 30° | 11 28° | 12 30° | 13  31° | 14 30° |
| 15 29° | 16 28° | 17 29° | 18 29° | 19 30° | 20  30° | 21 28° |
| 22 28° | 23 25° | 24  27° | 25 25° | 26 27° | 27 27° | 28 27° |
| 29 25° | 30 26° |
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Temperatures trend during September in Tokyo
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Moderate rain at times | 29° /24° | 3.7 mm | 7 | |
| 2 Sept. | Moderate or heavy rain shower | 28° /23° | 14.3 mm | 7 | |
| 3 Sept. | Moderate or heavy rain shower | 27° /22° | 13.7 mm | 6 | |
| 4 Sept. | Heavy rain at times | 27° /21° | 22 mm | 6 | |
| 5 Sept. | Partly cloudy | 29° /23° | 3.5 mm | 7 | |
| 6 Sept. | Patchy rain possible | 29° /24° | 0.5 mm | 7 | |
| 7 Sept. | Partly cloudy | 29° /23° | 3.1 mm | 7 | |
| 8 Sept. | Moderate or heavy rain shower | 27° /22° | 38.6 mm | 6 | |
| 9 Sept. | Moderate or heavy rain shower | 29° /23° | 14.9 mm | 6 | |
| 10 Sept. | Partly cloudy | 30° /23° | 1.3 mm | 7 | |
| 11 Sept. | Heavy rain at times | 28° /23° | 1.1 mm | 7 | |
| 12 Sept. | Partly cloudy | 30° /24° | 0.2 mm | 7 | |
| 13 Sept. | Overcast | 31° /24° | 0.1 mm | 7 | |
| 14 Sept. | Patchy rain possible | 30° /24° | 1 mm | 7 | |
| 15 Sept. | Overcast | 29° /23° | 1.8 mm | 7 | |
| 16 Sept. | Patchy rain possible | 28° /22° | 3.9 mm | 6 | |
| 17 Sept. | Patchy rain possible | 29° /23° | 0.6 mm | 7 | |
| 18 Sept. | Moderate or heavy rain shower | 29° /25° | 11.2 mm | 7 | |
| 19 Sept. | Overcast | 30° /24° | 2.4 mm | 7 | |
| 20 Sept. | Sunny | 30° /23° | 6.5 mm | 7 | |
| 21 Sept. | Overcast | 28° /22° | 0.5 mm | 6 | |
| 22 Sept. | Light rain shower | 28° /21° | 5.9 mm | 6 | |
| 23 Sept. | Light rain shower | 25° /20° | 7.8 mm | 6 | |
| 24 Sept. | Cloudy | 27° /21° | 8.4 mm | 6 | |
| 25 Sept. | Patchy rain possible | 25° /20° | 0.5 mm | 6 | |
| 26 Sept. | Sunny | 27° /20° | 0.6 mm | 6 | |
| 27 Sept. | Patchy rain possible | 27° /21° | 1.8 mm | 6 | |
| 28 Sept. | Patchy rain possible | 27° /20° | 2 mm | 6 | |
| 29 Sept. | Partly cloudy | 25° /20° | 3.4 mm | 6 | |
| 30 Sept. | Patchy rain possible | 26° /21° | 5.2 mm | 6 | |
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Guide for Tokyo in September
Tokyo, Japan, in September experiences a transition from the hot, humid summer to a more temperate autumn. At the beginning of the month, the weather remains quite warm and humid, with average daytime temperatures around 27° and nighttime temperatures around 21°.
The humidity can be quite high, often making it feel warmer than the actual temperature. Rain is also common during this period, as September is part of the typhoon season.
Typhoons can bring heavy rainfall and strong winds, so it’s important to stay updated on weather forecasts if you’re traveling during this time.
As the month progresses, the weather starts to cool down. By the end of September, daytime temperatures typically drop to around 23°, and nighttime temperatures can fall to around 18°. The humidity levels also decrease, making the weather feel more comfortable.
Rainfall becomes less frequent towards the end of the month, although occasional showers can still occur. The skies often clear up, providing more sunny days and a pleasant atmosphere for outdoor activities.
Overall, September in Tokyo offers a mix of warm, humid days at the beginning and cooler, more comfortable weather towards the end. It’s a month of change, bridging the gap between the intense summer heat and the mild autumn.
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Tokyo in September - FAQ
What to pack to Tokyo in September?
As you prepare for your trip to Tokyo 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 Tokyo, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
September rainfall patterns in Tokyo
UV exposure in Tokyo during September
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