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Ichihara Weather by Month
Average temperatures, rainfall and humidity for Ichihara, Japan, month by month, built from OpenWeather's historical records. Use it to see what a typical Ichihara month looks like before you travel — then check the live Ichihara forecast for the days ahead.
Warmest month
August
32°C average high
Coolest month
January
3°C average low
Wettest month
June
156 mm of rain
Driest month
January
34 mm of rain
Average temperature and rainfall in Ichihara 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 | 3°C | -4°C / 18°C | 34 mm | 56% | 16 km/h |
| February | 11°C | 4°C | -3°C / 23°C | 52 mm | 59% | 18 km/h |
| March | 15°C | 7°C | -2°C / 27°C | 95 mm | 64% | 19 km/h |
| April | 19°C | 12°C | 3°C / 27°C | 118 mm | 69% | 19 km/h |
| May | 23°C | 16°C | 8°C / 33°C | 110 mm | 73% | 18 km/h |
| June | 26°C | 20°C | 12°C / 37°C | 156 mm | 80% | 15 km/h |
| July | 30°C | 24°C | 15°C / 39°C | 119 mm | 80% | 16 km/h |
| August | 32°C | 25°C | 19°C / 39°C | 117 mm | 78% | 17 km/h |
| September | 28°C | 22°C | 14°C / 37°C | 130 mm | 78% | 16 km/h |
| October | 22°C | 16°C | 6°C / 32°C | 121 mm | 74% | 17 km/h |
| November | 17°C | 10°C | -1°C / 26°C | 68 mm | 66% | 15 km/h |
| December | 12°C | 5°C | -2°C / 23°C | 43 mm | 57% | 16 km/h |
Best time to visit Ichihara
The most comfortable time to visit Ichihara 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 1164 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 156 mm, roughly 5× the rainfall of January.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Ichihara forecast for what is happening now.