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Numazu Weather by Month
Average temperatures, rainfall and humidity for Numazu, Japan, month by month, built from OpenWeather’s historical records. Use it to see what a typical Numazu month looks like before you travel — then check the live Numazu forecast for the days ahead.
Warmest month
August
31°C average high
Coolest month
January
0°C average low
Wettest month
July
180 mm of rain
Driest month
January
43 mm of rain
Average temperature and rainfall in Numazu by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 10°C | 0°C | -18°C / 18°C | 43 mm | 66% | 9 km/h |
| February | 11°C | 0°C | -19°C / 24°C | 78 mm | 66% | 9 km/h |
| March | 14°C | 5°C | -11°C / 25°C | 160 mm | 70% | 11 km/h |
| April | 18°C | 10°C | -5°C / 27°C | 173 mm | 72% | 10 km/h |
| May | 22°C | 14°C | 0°C / 30°C | 116 mm | 73% | 8 km/h |
| June | 25°C | 18°C | 5°C / 34°C | 176 mm | 81% | 8 km/h |
| July | 29°C | 22°C | 13°C / 37°C | 180 mm | 83% | 8 km/h |
| August | 31°C | 23°C | 10°C / 37°C | 126 mm | 79% | 9 km/h |
| September | 27°C | 20°C | 5°C / 35°C | 143 mm | 81% | 9 km/h |
| October | 22°C | 13°C | -3°C / 36°C | 126 mm | 79% | 9 km/h |
| November | 17°C | 8°C | -10°C / 26°C | 84 mm | 76% | 9 km/h |
| December | 13°C | 2°C | -14°C / 24°C | 53 mm | 69% | 9 km/h |
Best time to visit Numazu
The most comfortable time to visit Numazu is generally May to June and October, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around July, totalling about 1,458 mm a year.
Travellers who prefer heat should aim for August, when highs average 31°C. July is the month to avoid if rain would spoil your plans — it averages 180 mm, roughly 4× the rainfall of the driest month (January).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Numazu forecast for what is happening now.