Fairmount, IL 14 Day Weather - 61841 WeatherWorld.com
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Fairmount, IL Weather Forecast


Fairmount, IL Weather Forecast Dated: 652 AM Wed Sep 02 2026 (Fairmount Time)
Expect a very warm period with a mix of sun and clouds and occasional showers over the coming period. generally humid conditions and no major pressure swings will dominate. Isolated storms at times.
Wednesday, September 2, 2026
Mid-Morning
83°F 28°C
Sunny
Mid-Afternoon
94°F 35°C
Sunny
Early-Evening
89°F 32°C
Sunny
Sizzling hot near 94°F 35°C with a heat index reaching 104°F 40°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds turning from the SSW to the S at 7 mph 12 km/h.
Thursday, September 3, 2026
Mid-Morning
81°F 27°C
Sunny
Mid-Afternoon
95°F 35°C
Sunny
Early-Evening
87°F 31°C
Sunny
Hot and sweltering around 95°F 35°C (heat index 101°F 38°C), sunny throughout the day, with lower humidity and steady pressure. Winds switching from the SW to the S at 8 mph 13 km/h.
Friday, September 4, 2026
Mid-Morning
83°F 28°C
Sunny
Mid-Afternoon
91°F 33°C
Nearby Thunderstorms
Early-Evening
86°F 30°C
Nearby Thunderstorms
Very hot with a high of 91°F 33°C, feeling closer to 98°F 37°C in the humidity, heavy thunderstorms conditions at times, with steady humidity and steady pressure. Winds moving from the WSW to the SSW at 7 mph 11 km/h.
Saturday, September 5, 2026
Mid-Morning
80°F 27°C
Sunny
Mid-Afternoon
90°F 32°C
Sunny
Early-Evening
82°F 28°C
Sunny
Sizzling hot near 90°F 32°C with a heat index reaching 98°F 36°C, sunny throughout the day, with increasing humidity and steady pressure. Winds swinging from the WNW to the E at 8 mph 13 km/h.
Sunday, September 6, 2026
Mid-Morning
67°F 19°C
Partly Cloudy
Mid-Afternoon
85°F 29°C
Nearby Thunderstorms
Early-Evening
79°F 27°C
Nearby Thunderstorms
Quite warm reaching 85°F 29°C, feeling like 91°F 33°C during peak afternoon, locally heavy thunderstorms at times, with steady humidity and steady pressure. Winds shifting from the ESE to the E at 8 mph 13 km/h.
Monday, September 7, 2026
Mid-Morning
73°F 23°C
Scattered Showers
Mid-Afternoon
87°F 30°C
Overcast
Early-Evening
80°F 27°C
Nearby Thunderstorms
Very warm near 87°F 30°C, though humidity makes it feel like 92°F 33°C, locally heavy downpours at times, with steady humidity and barometric pressure falling. Winds SSE at 7 mph 12 km/h.
Tuesday, September 8, 2026
Mid-Morning
74°F 24°C
Light Showers
Mid-Afternoon
75°F 24°C
Scattered Showers
Early-Evening
63°F 18°C
Scattered Showers
Comfortable with temperatures reaching 75°F 24°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds picking up from W at 4 mph 7 km/h to NE at 14 mph 22 km/h. Gusts up to 20 mph 33 km/h.
Wednesday, September 9, 2026
Mid-Morning
62°F 17°C
Cloudy
Mid-Afternoon
78°F 25°C
Sunny
Early-Evening
76°F 25°C
Overcast
Enjoyable around 78°F 25°C, partly cloudy in the morning, cloudy in the afternoon, and sunny this evening, with steady humidity and barometric pressure falling. Winds moving from the E to the SE at 9 mph 14 km/h.
Thursday, September 10, 2026
Mid-Morning
87°F 31°C
Sunny
Mid-Afternoon
100°F 38°C
Sunny
Early-Evening
96°F 35°C
Sunny
Dangerously hot with a high of 100°F 38°C (heat index near 107°F 42°C), sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds swinging from the SW to the SSW at 15 mph 24 km/h. Gusts up to 33 mph 52 km/h.
Friday, September 11, 2026
Mid-Morning
74°F 23°C
Scattered Showers
Mid-Afternoon
76°F 24°C
Cloudy
Early-Evening
74°F 23°C
Cloudy
Mild with a high of 76°F 24°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure.
Saturday, September 12, 2026
Mid-Morning
65°F 18°C
Overcast
Mid-Afternoon
73°F 23°C
Overcast
Early-Evening
73°F 23°C
Overcast
Pleasant near 73°F 23°C, overcast through the afternoon, turning cloudy this evening, with steady humidity and steady pressure. Winds out of the E at 9 mph 14 km/h.
Sunday, September 13, 2026
Mid-Morning
74°F 23°C
Fog
Mid-Afternoon
90°F 32°C
Cloudy
Early-Evening
85°F 30°C
Sunny
Very hot with a high of 90°F 32°C, feeling closer to 96°F 35°C in the humidity, partly cloudy through the afternoon, turning cloudy this evening, with lower humidity and steady pressure. Winds turning from the SSE to the S at 8 mph 12 km/h.
Monday, September 14, 2026
Mid-Morning
82°F 28°C
Overcast
Mid-Afternoon
90°F 32°C
Cloudy
Early-Evening
83°F 29°C
Sunny
Sizzling hot near 90°F 32°C with a heat index reaching 95°F 35°C, overcast in the morning, partly cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure. Winds switching from the SW to the SE at 8 mph 13 km/h.
Tuesday, September 15, 2026
Mid-Morning
73°F 23°C
Partly Cloudy
Mid-Afternoon
81°F 27°C
Sunny
Early-Evening
76°F 25°C
Sunny
Quite warm reaching 81°F 27°C, feeling like 85°F 29°C during peak afternoon, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and barometric pressure falling. Winds moving from the NE to the ENE at 9 mph 14 km/h.
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