Charleston Weather in June
What's the weather like in Charleston (Illinois) in June 2025?
The climate in Charleston during June can be summarized as warm and a little damp.
June is in the summer in Charleston and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 29°C (83°F), whilst at night 16°C (61°F) is normal.
| Daytime temperature | 28.5°C 83.2°F |
|---|---|
| Nightly temperature | 16.4°C 61.4°F |
| Average temperature | 22.4°C 72.3°F |
| Daily sunshine | 11 hrs |
| Avg rainfall | 96 mm 3.8 ins |
| Rainy days | 9 days |
| Sea temperature | 15.3°C 59.6°F |
| Humidity | 67% |
| Windspeed | 14.4kph 9 mph |
On average June is the 3rd wettest month of the year in Charleston with around 96mm 3.8 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 11 hours of sunshine per day.
June temperatures in Charleston
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 Charleston in June 2025.
Other monthly averages
Charleston weather stats
| Hottest month: | July | 29.8°C 85.6°F |
|---|---|---|
| Driest month: | February | 53mm 2.1ins |
| Sunniest month: | July | 10.9hrs |
| Coldest month: | January | 1°C 33.8°F |
| Wettest month: | July | 108mm 4.3ins |
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