Tokyo Weather in September
Japan · Humid Subtropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
September in Tokyo sees average temperatures ranging from a low of 21.3°C (70.3°F) to a high of 28.2°C (82.8°F), with a mean of 24.4°C (75.9°F). Compared to the annual average of 15.9°C (60.6°F), this month is 8.5°C warmer than the yearly norm. Precipitation averages 188.4mm, making it approximately 52.0mm wetter than the monthly average of 137.0mm. The city receives an average of 7.7 hours of sunshine per day during September, with relative humidity averaging 80.8%. Wind speeds reach an average maximum of 23.8 km/h. For travelers, this month offers a temperature experience in Tokyo, with wetter-than-average conditions compared to the rest of the year.
If you're planning outdoor activities in Tokyo, avoid June-July like the plague. The humidity is suffocating — I've hiked in 90% humidity and it's not fun. October is the sweet spot: clear skies, 18°C, low rain. For cherry blossoms, aim for the last week of March to first week of April. The data confirms what locals have always known: autumn is Tokyo's best-kept secret.
September vs Adjacent Months
| Metric | August | September | October |
|---|---|---|---|
| Mean Temp | 28.0°C (82.4°F) | 24.4°C (75.9°F) | 17.6°C (63.7°F) |
| Rainfall | 144.9mm | 188.4mm | 158.3mm |
| Sunshine | 10.5 hrs | 7.7 hrs | 7.1 hrs |
| Humidity | 77.6% | 80.8% | 77.1% |
| Wind | 26.2 km/h | 23.8 km/h | 23.4 km/h |
| Rainy Days | 21.4 | 19.8 | 16.6 |
Seasonal Context
September falls in Autumn in the Northern Hemisphere. Autumn sees temperatures gradually cooling from summer highs. For travelers visiting Tokyo in September, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Tokyo in September?
The average temperature in Tokyo during September ranges from 21.3°C (70.3°F) to 28.2°C (82.8°F), with a mean of 24.4°C (75.9°F).
How much does it rain in Tokyo in September?
Tokyo receives an average of 188.4mm of precipitation in September, spread across approximately 19.8 rainy days.
What should I pack for Tokyo in September?
Based on September weather data, pack layers including light jackets and t-shirts, plus an umbrella. Rain gear is essential — this month averages 188.4mm of precipitation.
Is September a good time to visit Tokyo?
September is a month with challenging conditions. Plan activities carefully and stay hydrated.
Other Months for Tokyo
Cities with Similar September Climate (Humid Subtropical)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 35.68°, 139.69°. Timezone: Asia/Tokyo. Last updated: 2026-07-30.