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Tokyo weather by month
Historical averages 2016–2025 · not a forecast
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When is the best time to visit Tokyo?
For a warm holiday, the best week has been 1–7 June (Weather Index 85). Several start dates remain plausible, and the best timing varies between years. August is warmest (32°C), January is driest and August has the most sun.
- Warmest
- August 32°C
- Coolest
- January 10°C
- Driest
- January 18% rain-day chance
- Wettest
- September 49% rain-day chance
- Sunniest
- August 10 hours a day
A rain day has 1 mm or more, snow included, so a short shower counts. Monthly averages below give the amounts.
Monthly averages in Tokyo
Tokyo historical monthly estimates, 2016–2025. Temperatures and sunshine are daily averages.
| Month | High (°C) | Low (°C) | Rain-day chance (%) | Expected rain days | Precipitation (mm/month) | Sunshine (hours/day) |
|---|---|---|---|---|---|---|
| January | 9.5 | 0.8 | 18.4 | 5.7 | 51.7 | 8.3 |
| February | 10.7 | 1.7 | 24.6 | 6.9 | 47.4 | 8.6 |
| March | 14.5 | 5.8 | 36.5 | 11.3 | 126.5 | 8.4 |
| April | 18.9 | 10.7 | 38.3 | 11.5 | 121.6 | 8.9 |
| May | 23.1 | 15.5 | 36.8 | 11.4 | 127.8 | 8.8 |
| June | 26.3 | 19.7 | 43.3 | 13.0 | 173.3 | 8.4 |
| July | 30.3 | 24.0 | 42.3 | 13.1 | 164.5 | 9.0 |
| August | 31.8 | 25.4 | 37.1 | 11.5 | 116.5 | 10.1 |
| September | 27.7 | 21.9 | 48.7 | 14.6 | 160.6 | 7.8 |
| October | 21.7 | 15.1 | 43.9 | 13.6 | 194.2 | 6.8 |
| November | 16.9 | 8.9 | 31.3 | 9.4 | 81.8 | 7.5 |
| December | 11.8 | 3.2 | 21.6 | 6.7 | 51.6 | 7.7 |
Each month averages its own days. Precipitation includes snow. About the data
Sources
Open-Meteo · 1 Jan 2016 – 31 Dec 2025
- Open-Meteo Historical Weather API
- Local days, 2016–2025, every year weighted equally. Each weekly chart averages its own seven days, without smoothing.
- Shading shows the 10th–90th percentile of past days, not forecast confidence.
- A rain day has at least 1 mm, snow included. The last weekly period has eight days.
- Wind is the average daytime (10:00–18:00) maximum, not gusts. Daylight is calculated from latitude. Missing readings stay blank.
- Mugginess (dew point) comes from the original daily summaries, on UTC days.
- The live two-week forecast comes from the Open-Meteo Weather Forecast API. The Weather Index does not use it.