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Mattoon, WI Weather Forecast
Mattoon, WI Weather Forecast Dated: 1201 AM Sun Sep 20 2026
Expect a cool pattern with a mix of sun and clouds and occasional showers over the coming period. generally humid conditions and a stable pattern will dominate.
Sunday, September 20, 2026
Mid-Morning
51°F 11°C
Partly Cloudy
Mid-Afternoon
64°F 18°C
Cloudy
Early-Evening
53°F 12°C
Overcast
Refreshing around 64°F 18°C, partly cloudy in the morning, cloudy in the afternoon, and overcast this evening, with lower humidity and steady pressure. Winds turning from the NNE to the NE at 11 mph 17 km/h. Gusts up to 22 mph 35 km/h.
Monday, September 21, 2026
Mid-Morning
48°F 9°C
Overcast
Mid-Afternoon
57°F 14°C
Cloudy
Early-Evening
50°F 10°C
Overcast
Cool and brisk at 57°F 14°C, overcast throughout the day, with steady humidity and steady pressure. Winds blowing from the ENE at 10 mph 15 km/h.
Tuesday, September 22, 2026
Mid-Morning
47°F 8°C
Partly Cloudy
Mid-Afternoon
60°F 15°C
Sunny
Early-Evening
51°F 11°C
Sunny
Comfortable at 60°F 15°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds moving from the NE to the NNE at 7 mph 11 km/h.
Wednesday, September 23, 2026
Mid-Morning
49°F 10°C
Sunny
Mid-Afternoon
63°F 17°C
Sunny
Early-Evening
55°F 13°C
Sunny
Cool with a high near 63°F 17°C, sunny throughout the day, with steady humidity and steady pressure. Winds swinging from the ENE to the NE at 6 mph 9 km/h.
Thursday, September 24, 2026
Mid-Morning
53°F 12°C
Fog
Mid-Afternoon
62°F 17°C
Overcast
Early-Evening
57°F 14°C
Overcast
Refreshing around 62°F 17°C, overcast throughout the day, with steady humidity and steady pressure. Winds shifting from the ENE to the E at 5 mph 8 km/h.
Friday, September 25, 2026
Mid-Morning
55°F 13°C
Light Fog
Mid-Afternoon
65°F 19°C
Sunny
Early-Evening
59°F 15°C
Partly Cloudy
Mildly cool near 65°F 19°C, overcast in the morning, partly cloudy in the afternoon, and cloudy this evening, with steady humidity and steady pressure.
Saturday, September 26, 2026
Mid-Morning
54°F 12°C
Sunny
Mid-Afternoon
64°F 18°C
Overcast
Early-Evening
60°F 16°C
Cloudy
Comfortable at 64°F 18°C, cloudy in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds turning from the SE to the SSW at 5 mph 8 km/h.
Sunday, September 27, 2026
Mid-Morning
54°F 12°C
Sunny
Mid-Afternoon
64°F 18°C
Sunny
Early-Evening
62°F 17°C
Overcast
Cool with a high near 64°F 18°C, cloudy through the afternoon, turning overcast this evening, with steady humidity and steady pressure.
Monday, September 28, 2026
Mid-Morning
57°F 14°C
Light Fog
Mid-Afternoon
56°F 13°C
Scattered Showers
Early-Evening
50°F 11°C
Light Showers
Brisk around 56°F 13°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds switching from the SW to the NE at 8 mph 13 km/h. Gusts up to 22 mph 36 km/h.
Tuesday, September 29, 2026
Mid-Morning
48°F 9°C
Light Fog
Mid-Afternoon
58°F 15°C
Sunny
Early-Evening
51°F 11°C
Sunny
Mildly cool near 58°F 15°C, sunny throughout the day, with lower humidity and steady pressure. Winds blowing from the NE at 9 mph 14 km/h. Gusts up to 20 mph 33 km/h.
Wednesday, September 30, 2026
Mid-Morning
48°F 9°C
Light Fog
Mid-Afternoon
55°F 13°C
Partly Cloudy
Early-Evening
51°F 11°C
Overcast
Chilly near 55°F 13°C, sunny in the morning, cloudy in the afternoon, and overcast this evening, with steady humidity and steady pressure. Winds ENE at 9 mph 15 km/h. Gusts up to 23 mph 36 km/h.
Thursday, October 1, 2026
Mid-Morning
51°F 11°C
Sunny
Mid-Afternoon
54°F 12°C
Overcast
Early-Evening
53°F 12°C
Scattered Showers
Crisp with a high near 54°F 12°C, locally heavy downpours at times, with increasing humidity and steady pressure. Winds out of the NE at 11 mph 18 km/h. Gusts up to 25 mph 40 km/h.
Friday, October 2, 2026
Mid-Morning
52°F 11°C
Scattered Showers
Mid-Afternoon
60°F 16°C
Overcast
Early-Evening
58°F 14°C
Overcast
Refreshing around 60°F 16°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds turning from the NNE to the NE at 6 mph 9 km/h.
Saturday, October 3, 2026
Mid-Morning
54°F 12°C
Sunny
Mid-Afternoon
66°F 19°C
Sunny
Early-Evening
59°F 15°C
Sunny
Mildly cool near 66°F 19°C, sunny throughout the day, with steady humidity and barometric pressure falling.
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