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Fairmount, IL Weather & Growing Conditions

Today
87°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms between 8am and 3pm. Mostly cloudy, with a high near 87. South southeast wind around 7 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
Today 87°F Chance Showers And Thunderstorms 7 mph SSE 48%
Tonight 69°F Mostly Cloudy then Slight Chance Showers And Thunderstorms 5 mph S 18%
Sunday 82°F Chance Showers And Thunderstorms 2 to 10 mph N 65%
Sunday Night 59°F Showers And Thunderstorms Likely then Chance Showers And Thunderstorms 14 mph NE 63%
Monday 69°F Showers And Thunderstorms Likely 13 to 16 mph NE 69%
Monday Night 54°F Chance Rain Showers 12 to 16 mph NE 48%
Tuesday 68°F Chance Showers And Thunderstorms 14 mph NE 31%
Tuesday Night 53°F Chance Showers And Thunderstorms then Mostly Cloudy 7 to 14 mph NNE 31%
Wednesday 70°F Partly Sunny 10 mph NNE 7%
Wednesday Night 54°F Mostly Cloudy 5 to 10 mph NNE 7%
Thursday 71°F Partly Sunny 8 mph NNE 2%
Thursday Night 55°F Partly Cloudy 3 to 7 mph NNE 2%
Friday 74°F Mostly Sunny 5 to 9 mph NNE 2%
Friday Night 53°F Partly Cloudy 3 to 8 mph NE 2%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Fairmount, IL

Last spring frost
Apr 19
First fall frost
Oct 19
Growing season
181 days
Hardiness zone
6a

Explore more for Fairmount, IL: full frost dates · planting calendar · Illinois frost dates

Climate data from the nearest NOAA station, Sidell 4N, Il (4.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.