- Isehara ›
- Weather by month
Isehara Weather by Month
Average temperatures, rainfall and humidity for Isehara, Japan, month by month, built from OpenWeather's historical records. Use it to see what a typical Isehara month looks like before you travel — then check the live Isehara forecast for the days ahead.
Warmest month
August
32°C average high
Coolest month
January
1°C average low
Wettest month
June
177 mm of rain
Driest month
January
34 mm of rain
Average temperature and rainfall in Isehara 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 | 1°C | -12°C / 18°C | 34 mm | 57% | 10 km/h |
| February | 11°C | 2°C | -9°C / 23°C | 48 mm | 58% | 11 km/h |
| March | 15°C | 6°C | -7°C / 27°C | 99 mm | 62% | 11 km/h |
| April | 19°C | 11°C | -3°C / 27°C | 130 mm | 65% | 11 km/h |
| May | 24°C | 15°C | 5°C / 32°C | 106 mm | 68% | 11 km/h |
| June | 26°C | 19°C | 11°C / 35°C | 177 mm | 76% | 9 km/h |
| July | 30°C | 24°C | 17°C / 38°C | 152 mm | 77% | 10 km/h |
| August | 32°C | 25°C | 18°C / 38°C | 134 mm | 74% | 10 km/h |
| September | 28°C | 21°C | 8°C / 36°C | 134 mm | 75% | 10 km/h |
| October | 22°C | 15°C | 3°C / 32°C | 134 mm | 72% | 10 km/h |
| November | 17°C | 9°C | -1°C / 26°C | 73 mm | 66% | 9 km/h |
| December | 13°C | 4°C | -9°C / 23°C | 46 mm | 59% | 10 km/h |
Best time to visit Isehara
The most comfortable time to visit Isehara 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 June, totalling about 1267 mm a year.
Travellers who prefer heat should aim for August, when highs average 32°C. June is the month to avoid if rain would spoil your plans — it averages 177 mm, roughly 5× the rainfall of January.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Isehara forecast for what is happening now.