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Fountain, IL Weather Forecast
Fountain, IL Weather Forecast Dated: 849 PM Wed Sep 23 2026
Expect a mild stretch with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate.
Wednesday, September 23, 2026
Mid-Morning
63°F 17°C
Sunny
Mid-Afternoon
70°F 21°C
Scattered Showers
Early-Evening
66°F 19°C
Cloudy
Pleasant near 70°F 21°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds turning from the NNE to the ENE at 8 mph 13 km/h.
Thursday, September 24, 2026
Mid-Morning
63°F 17°C
Sunny
Mid-Afternoon
77°F 25°C
Sunny
Early-Evening
73°F 23°C
Sunny
Comfortable with temperatures reaching 77°F 25°C, sunny throughout the day, with lower humidity and steady pressure.
Friday, September 25, 2026
Mid-Morning
66°F 19°C
Overcast
Mid-Afternoon
72°F 22°C
Overcast
Early-Evening
67°F 19°C
Overcast
Enjoyable around 72°F 22°C, overcast throughout the day, with steady humidity and steady pressure. Winds blowing from the ENE at 5 mph 8 km/h.
Saturday, September 26, 2026
Mid-Morning
57°F 14°C
Drizzle
Mid-Afternoon
58°F 15°C
Scattered Showers
Early-Evening
58°F 14°C
Overcast
Cool with a high near 58°F 15°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure.
Sunday, September 27, 2026
Mid-Morning
59°F 15°C
Overcast
Mid-Afternoon
75°F 24°C
Overcast
Early-Evening
71°F 22°C
Overcast
Mild with a high of 75°F 24°C, overcast through the afternoon, turning cloudy this evening, with lower humidity and steady pressure.
Monday, September 28, 2026
Mid-Morning
63°F 17°C
Sunny
Mid-Afternoon
78°F 26°C
Cloudy
Early-Evening
74°F 24°C
Overcast
Pleasant near 78°F 26°C, partly cloudy in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and barometric pressure falling. Winds SE at 8 mph 12 km/h.
Tuesday, September 29, 2026
Mid-Morning
63°F 17°C
Light Showers
Mid-Afternoon
67°F 19°C
Heavy Rain Showers
Early-Evening
68°F 20°C
Light Showers
Comfortable at 67°F 19°C, rounds of showers expected off and on all day, with increasing humidity and barometric pressure falling. Winds swinging from the SE to the SSE at 13 mph 21 km/h. Gusts up to 27 mph 44 km/h.
Wednesday, September 30, 2026
Mid-Morning
58°F 15°C
Scattered Showers
Mid-Afternoon
66°F 19°C
Sunny
Early-Evening
63°F 17°C
Sunny
Cool with a high near 66°F 19°C, scattered downpours possible, with lower humidity and barometric pressure rising. Winds blowing from the NW at 17 mph 28 km/h. Gusts up to 20 mph 31 km/h.
Thursday, October 1, 2026
Mid-Morning
59°F 15°C
Sunny
Mid-Afternoon
70°F 21°C
Overcast
Early-Evening
65°F 19°C
Overcast
Mild temperatures up to 70°F 21°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and steady pressure.
Friday, October 2, 2026
Mid-Morning
59°F 15°C
Overcast
Mid-Afternoon
73°F 23°C
Overcast
Early-Evening
68°F 20°C
Overcast
Mild with a high of 73°F 23°C, overcast throughout the day, with lower humidity and steady pressure.
Saturday, October 3, 2026
Mid-Morning
65°F 18°C
Sunny
Mid-Afternoon
76°F 25°C
Sunny
Early-Evening
67°F 20°C
Sunny
Pleasant near 76°F 25°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. Winds increasing from the NW at 5 mph 9 km/h to ESE at 13 mph 20 km/h. Gusts up to 21 mph 34 km/h.
Sunday, October 4, 2026
Mid-Morning
54°F 12°C
Partly Cloudy
Mid-Afternoon
64°F 18°C
Partly Cloudy
Early-Evening
54°F 12°C
Overcast
Cool with a high near 64°F 18°C, overcast in the morning, cloudy in the afternoon, and overcast this evening, with increasing humidity and steady pressure. Winds out of the WSW at 13 mph 21 km/h. Gusts up to 21 mph 33 km/h.
Monday, October 5, 2026
Mid-Morning
47°F 9°C
Scattered Showers
Mid-Afternoon
56°F 13°C
Overcast
Early-Evening
56°F 13°C
Overcast
Brisk around 56°F 13°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds blowing from the ESE at 12 mph 19 km/h.
Tuesday, October 6, 2026
Mid-Morning
51°F 11°C
Sunny
Mid-Afternoon
63°F 17°C
Overcast
Early-Evening
58°F 14°C
Sunny
Mildly cool near 63°F 17°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure.
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