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Ibaraki Weather by Month
Average temperatures, rainfall and humidity for Ibaraki, Japan, month by month, built from OpenWeather's historical records. Use it to see what a typical Ibaraki month looks like before you travel — then check the live Ibaraki forecast for the days ahead.
Warmest month
August
33°C average high
Coolest month
January
2°C average low
Wettest month
June
170 mm of rain
Driest month
January
62 mm of rain
Average temperature and rainfall in Ibaraki 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 | 9°C | 2°C | -12°C / 17°C | 62 mm | 67% | 12 km/h |
| February | 10°C | 2°C | -10°C / 20°C | 76 mm | 65% | 12 km/h |
| March | 14°C | 6°C | -4°C / 24°C | 110 mm | 64% | 12 km/h |
| April | 19°C | 11°C | 0°C / 29°C | 128 mm | 64% | 12 km/h |
| May | 24°C | 15°C | 4°C / 32°C | 105 mm | 65% | 10 km/h |
| June | 27°C | 20°C | 9°C / 36°C | 170 mm | 72% | 10 km/h |
| July | 31°C | 24°C | 17°C / 40°C | 139 mm | 75% | 10 km/h |
| August | 33°C | 25°C | 17°C / 39°C | 140 mm | 70% | 10 km/h |
| September | 29°C | 22°C | 13°C / 37°C | 118 mm | 71% | 11 km/h |
| October | 23°C | 16°C | 4°C / 33°C | 101 mm | 70% | 11 km/h |
| November | 17°C | 10°C | -1°C / 27°C | 74 mm | 69% | 10 km/h |
| December | 12°C | 4°C | -6°C / 23°C | 74 mm | 68% | 12 km/h |
Best time to visit Ibaraki
The most comfortable time to visit Ibaraki is generally May and October to November, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around June, totalling about 1298 mm a year.
Travellers who prefer heat should aim for August, when highs average 33°C. June is the month to avoid if rain would spoil your plans — it averages 170 mm, roughly 3× the rainfall of January.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Ibaraki forecast for what is happening now.