Sullivan Weather in April
What's the weather like in Sullivan (Indiana) in April 2025?
The climate in Sullivan during April can be summarized as mild and a little damp.
April is in the spring in Sullivan and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a cool 19°C (66°F), whilst at night 6°C (43°F) is normal.
| Daytime temperature | 18.7°C 65.7°F |
|---|---|
| Nightly temperature | 6.3°C 43.3°F |
| Average temperature | 12.5°C 54.5°F |
| Daily sunshine | 8 hrs |
| Avg rainfall | 99 mm 3.9 ins |
| Rainy days | 12 days |
| Sea temperature | 8.6°C 47.5°F |
| Humidity | 65% |
| Windspeed | 18kph 11 mph |
On average April is the 4th wettest month of the year in Sullivan with around 99mm 3.9 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.
On the flip side this corresponds to an average of 8 hours of sunshine per day.
April temperatures in Sullivan
April rainfall
April 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 Sullivan in April 2025.
Other monthly averages
Sullivan weather stats
| Hottest month: | July | 30.7°C 87.3°F |
|---|---|---|
| Driest month: | January | 65mm 2.6ins |
| Sunniest month: | July | 10.8hrs |
| Coldest month: | January | 1.9°C 35.4°F |
| Wettest month: | May | 120mm 4.7ins |
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