Charleston Weather in May
What's the weather like in Charleston (Illinois) in May 2024?
The climate in Charleston during May can be summarized as mild and damp.
May is in the spring in Charleston and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a comfortable 24°C (75°F), whilst at night 11°C (53°F) is normal.
| Daytime temperature | 23.6°C 74.5°F |
|---|---|
| Nightly temperature | 11.4°C 52.5°F |
| Average temperature | 17.5°C 63.5°F |
| Daily sunshine | 9.6 hrs |
| Avg rainfall | 103 mm 4 ins |
| Rainy days | 11 days |
| Sea temperature | 11.8°C 53.2°F |
| Humidity | 67% |
| Windspeed | 16.2kph 10 mph |
On average May is the 2nd wettest month of the year in Charleston with around 103mm 4 inches of rain making it a damp time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.
On the flip side this corresponds to an average of 9.6 hours of sunshine per day.
May temperatures in Charleston
May rainfall
May 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 May 2024.
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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