Sullivan Weather in May

What's the weather like in Sullivan (Illinois) in May 2024?

The climate in Sullivan during May can be summarized as mild and damp.

May is in the spring in Sullivan 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 (52°F) is normal.

Sullivan weather averages (imperial / metric)
Daytime temperature 23.9°C 75°F
Nightly temperature 11.3°C 52.3°F
Average temperature 17.6°C 63.7°F
Daily sunshine 9.6 hrs
Avg rainfall 101 mm 4 ins
Rainy days 10 days
Sea temperature 11.8°C 53.2°F
Humidity 66%
Windspeed 16.6kph 10 mph

On average May is the 2nd wettest month of the year in Sullivan with around 101mm 4 inches of rain making it a damp time to visit. This rainfall is typically spread over 10 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 Sullivan

Sullivan average temperature in May

May rainfall

Sullivan average rain in May

May hourly sunshine

Sullivan average rain in May

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 Sullivan in May 2024.

Other monthly averages

Best places to visit in May

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Sullivan weather stats

Sullivan weather statistics
Hottest month: July 30.3°C 86.5°F
Driest month: February 50mm 2ins
Sunniest month: July 10.9hrs
Coldest month: January 0.9°C 33.6°F
Wettest month: July 105mm 4.1ins
Map showing location of Sullivan (39.59948, -88.60784) Sullivan map pin © Google

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