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Optimist Park, IL 14 Day Weather
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Optimist Park, IL Weather Forecast
Optimist Park, IL Weather Forecast Dated: 301 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 no major pressure swings will dominate.
Sunday, September 20, 2026
Mid-Morning
62°F 17°C
Scattered Showers
Mid-Afternoon
62°F 17°C
Overcast
Early-Evening
63°F 17°C
Overcast
Refreshing around 62°F 17°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds turning from the NNE to the ENE at 13 mph 21 km/h. Gusts up to 26 mph 42 km/h.
Monday, September 21, 2026
Mid-Morning
57°F 14°C
Scattered Showers
Mid-Afternoon
58°F 14°C
Light Showers
Early-Evening
56°F 13°C
Light Showers
Mildly cool near 58°F 14°C, scattered downpours possible, with increasing humidity and steady pressure. Winds switching from the ENE to the NE at 11 mph 17 km/h. Gusts up to 24 mph 38 km/h.
Tuesday, September 22, 2026
Mid-Morning
54°F 12°C
Light Showers
Mid-Afternoon
53°F 12°C
Overcast
Early-Evening
53°F 12°C
Overcast
Chilly near 53°F 12°C, morning showers, giving way to clearing skies, with steady humidity and steady pressure. Winds NE at 10 mph 17 km/h. Gusts up to 20 mph 33 km/h.
Wednesday, September 23, 2026
Mid-Morning
55°F 13°C
Overcast
Mid-Afternoon
66°F 19°C
Overcast
Early-Evening
60°F 16°C
Overcast
Cool with a high near 66°F 19°C, overcast throughout the day, with steady humidity and steady pressure. Winds swinging from the NNE to the NE at 8 mph 12 km/h.
Thursday, September 24, 2026
Mid-Morning
58°F 14°C
Light Fog
Mid-Afternoon
65°F 18°C
Overcast
Early-Evening
63°F 18°C
Overcast
Refreshing around 65°F 18°C, cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure.
Friday, September 25, 2026
Mid-Morning
60°F 16°C
Light Fog
Mid-Afternoon
67°F 20°C
Scattered Showers
Early-Evening
63°F 17°C
Scattered Showers
Mildly cool near 67°F 20°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds shifting from the ENE to the NE at 6 mph 11 km/h.
Saturday, September 26, 2026
Mid-Morning
60°F 15°C
Light Fog
Mid-Afternoon
70°F 21°C
Scattered Showers
Early-Evening
68°F 21°C
Overcast
Comfortable with temperatures reaching 70°F 21°C, periods of heavy rain and gusty conditions, with lower humidity and barometric pressure falling.
Sunday, September 27, 2026
Mid-Morning
65°F 18°C
Overcast
Mid-Afternoon
72°F 22°C
Overcast
Early-Evening
67°F 20°C
Sunny
Enjoyable around 72°F 22°C, partly cloudy through the afternoon, turning overcast this evening, with steady humidity and barometric pressure falling. Winds SSE at 13 mph 21 km/h. Gusts up to 24 mph 39 km/h.
Monday, September 28, 2026
Mid-Morning
52°F 11°C
Heavy Rain Showers
Mid-Afternoon
50°F 10°C
Scattered Showers
Early-Evening
49°F 9°C
Scattered Showers
Brisk around 50°F 10°C, locally heavy downpours at times, with lower humidity and barometric pressure rising. Winds switching from the WSW to the WNW at 17 mph 27 km/h. Gusts up to 27 mph 43 km/h.
Tuesday, September 29, 2026
Mid-Morning
46°F 8°C
Sunny
Mid-Afternoon
56°F 14°C
Partly Cloudy
Early-Evening
55°F 13°C
Overcast
Cool and brisk at 56°F 14°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and barometric pressure falling. Winds moving from the W to the SSE at 8 mph 14 km/h.
Wednesday, September 30, 2026
Mid-Morning
57°F 14°C
Scattered Showers
Mid-Afternoon
60°F 15°C
Sunny
Early-Evening
54°F 12°C
Partly Cloudy
Comfortable at 60°F 15°C, scattered downpours possible, with increasing humidity and barometric pressure rising. Winds swinging from the SSW to the WNW at 13 mph 21 km/h. Gusts up to 21 mph 33 km/h.
Thursday, October 1, 2026
Mid-Morning
51°F 11°C
Sunny
Mid-Afternoon
64°F 18°C
Sunny
Early-Evening
58°F 14°C
Sunny
Cool with a high near 64°F 18°C, sunny throughout the day, with steady humidity and steady pressure. Winds out of the W at 14 mph 23 km/h.
Friday, October 2, 2026
Mid-Morning
52°F 11°C
Sunny
Mid-Afternoon
63°F 17°C
Sunny
Early-Evening
56°F 14°C
Partly Cloudy
Refreshing around 63°F 17°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure. Winds turning from the NW to the S at 4 mph 6 km/h.
Saturday, October 3, 2026
Mid-Morning
54°F 12°C
Overcast
Mid-Afternoon
65°F 18°C
Overcast
Early-Evening
62°F 17°C
Overcast
Mildly cool near 65°F 18°C, overcast throughout the day, with steady humidity and steady pressure.
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