Fairmont City (IL) Weather & Climate: Best Time to Visit

The climate in Fairmont City is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a very warm 31°C (88°F) in July to a chilly 5°C (41°F) in the coolest month, January.

Nights vary from 21°C (70°F) in July to around -5°C (23°F) during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

Fairmont City has a notably wet climate with abundant precipitation, recording 1122 mm (44 in) of rain/snowfall per year. The climate in Fairmont City shows significant variation throughout the year. Expect high rainfall in June, the wettest month, with an average of 135 mm (5.3 in) of precipitation over 11 rainy days.

In contrast, the driest month January offers drier and sunnier days, with around 51 mm (2 in) of snow/rainfall over 7 snowy/rainy days. For more details, please visit our Fairmont City Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

For those who appreciate different seasons, Fairmont City serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 10.4 hours of sunshine daily, and embrace the darker days in December, offering only 4.3 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Fairmont City.

The city experiences its highest humidity in December, reaching 74%. In April, the humidity drops to its lowest level at 63%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year