Kosai Weather in June
What's the weather like in Kosai (Shizuoka) in June 2025?
The climate in Kosai during June can be summarized as warm, humid and very wet.
June is in the summer in Kosai and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 26°C (78°F), whilst at night 19°C (66°F) is normal.
| Daytime temperature | 25.5°C 77.9°F |
|---|---|
| Nightly temperature | 18.7°C 65.7°F |
| Average temperature | 22.1°C 71.8°F |
| Daily sunshine | 5.1 hrs |
| Avg rainfall | 255 mm 10 ins |
| Rainy days | 18 days |
| Sea temperature | 23.2°C 73.8°F |
| Humidity | 79% |
| Windspeed | 10.4kph 7 mph |
On average June is the wettest month of the year in Kosai with around 255mm 10 inches of rain making it a very wet time to visit. This rainfall is typically spread over 18 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.1 hours of sunshine per day.
June temperatures in Kosai
June rainfall
June hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Kosai in June 2025.
Other monthly averages
Kosai weather stats
| Hottest month: | August | 30.6°C 87.1°F |
|---|---|---|
| Driest month: | December | 51mm 2ins |
| Sunniest month: | January | 6.6hrs |
| Coldest month: | January | 9.3°C 48.7°F |
| Wettest month: | June | 255mm 10ins |
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