Effingham (IL) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Effingham.
Climate overview of Effingham
Effingham, Illinois, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 30°C (86°F) in July, while winters cool to 3°C (37°F) in January.
The city has a wet climate, receiving around 1216 mm (48 in) of rain/snowfall per year. Despite the high annual total, it has very warm summers and cold winters. June is the wettest month.
Effingham Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Effingham - and find the best time to visit.
Monthly Temperature in Effingham
Depending on the time of the year, temperatures range from very warm to chilly in Effingham. On average, daytime temperatures range from a very warm 30°C (86°F) in July to a chilly 3°C (37°F) in January.
Nighttime temperatures range from 19°C (66°F) in July to -7°C (19°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Effingham
Effingham has a relatively rain/snowy climate with high precipitation levels, averaging 1216 mm (48 in) of rain/snowfall annually. The seasons in Effingham bring significant changes in precipitation. The wettest month, June, receives high rainfall, with an average of 159 mm (6.3 in) of precipitation. This rainfall is distributed across 12 rainy days.
In contrast, the driest month, January, experiences much less snow/rainfall, totaling 61 mm (2.4 in) over 8 snowy/rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Effingham Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Effingham
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: September and October
- Warmest weather: June, July and August
- Seasonal pattern: Very warm summers and cold winters
- Coldest conditions: January, with freezing nights around -7°C (19°F).
Frequently asked questions about the climate in Effingham
What is the best time to visit Effingham?
September and October typically offer the most optimal weather in Effingham. In contrast, January, February and December tend to have less optimal conditions. Effingham has very warm summers and cold winters.
What temperatures can I expect in Effingham?
Daytime highs range from 3°C (37°F) in January to 30°C (86°F) in July. Nighttime lows range from -7°C (19°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does Effingham get?
Annual rainfall is around 1216 mm (48 in). June is the wettest month with 159 mm (6.3 in), while January is the driest with 61 mm (2.4 in).
Effingham 3-Day Forecast
Effingham on the map
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