Fairview Heights (IL) Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from very warm to chilly in Fairview Heights. 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

Fairview Heights has a relatively rain/snowy climate with high precipitation levels, averaging 1160 mm (46 in) of rain/snowfall annually. The climate in Fairview Heights shows significant variation throughout the year. Expect high rainfall in June, the wettest month, with an average of 140 mm (5.5 in) of precipitation over 12 rainy days.

In contrast, the driest month January offers drier and sunnier days, with around 56 mm (2.2 in) of snow/rainfall over 7 snowy/rainy days. For more details, please visit our Fairview Heights 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, Fairview Heights 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 Fairview Heights.

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