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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: 914 AM Fri Sep 18 2026
Expect a cool pattern with more clouds than sun and frequent chances of rain over the coming period. generally humid conditions and no major pressure swings will dominate.
Friday, September 18, 2026
Mid-Morning
64°F 18°C
Overcast
Mid-Afternoon
73°F 23°C
Sunny
Early-Evening
69°F 21°C
Scattered Showers
Pleasant near 73°F 23°C, periods of heavy rain and gusty conditions, with steady humidity and barometric pressure falling. Winds out of the ESE at 13 mph 20 km/h.
Saturday, September 19, 2026
Mid-Morning
64°F 18°C
Heavy Rain
Mid-Afternoon
69°F 21°C
Scattered Showers
Early-Evening
70°F 21°C
Light Showers
Comfortable with temperatures reaching 69°F 21°C, scattered downpours possible, with steady humidity and barometric pressure falling. Winds switching from the ESE to the E at 6 mph 9 km/h.
Sunday, September 20, 2026
Mid-Morning
68°F 20°C
Light Showers
Mid-Afternoon
64°F 18°C
Scattered Showers
Early-Evening
62°F 17°C
Overcast
Comfortable at 64°F 18°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds increasing from the ENE at 5 mph 9 km/h to ENE at 16 mph 24 km/h. Gusts up to 29 mph 46 km/h.
Monday, September 21, 2026
Mid-Morning
58°F 15°C
Light Showers
Mid-Afternoon
57°F 14°C
Light Showers
Early-Evening
57°F 14°C
Light Showers
Crisp with a high near 57°F 14°C, rounds of showers expected off and on all day, with steady humidity and steady pressure. Winds out of the ENE at 11 mph 18 km/h. Gusts up to 22 mph 35 km/h.
Tuesday, September 22, 2026
Mid-Morning
53°F 12°C
Light Showers
Mid-Afternoon
53°F 12°C
Overcast
Early-Evening
52°F 11°C
Overcast
Brisk around 53°F 12°C, scattered morning showers before drying out later, with steady humidity and steady pressure. Winds blowing from the NE at 10 mph 16 km/h. Gusts up to 20 mph 32 km/h.
Wednesday, September 23, 2026
Mid-Morning
56°F 13°C
Overcast
Mid-Afternoon
66°F 19°C
Overcast
Early-Evening
63°F 17°C
Scattered Showers
Mildly cool near 66°F 19°C, locally heavy downpours at times, with steady humidity and steady pressure.
Thursday, September 24, 2026
Mid-Morning
60°F 15°C
Overcast
Mid-Afternoon
69°F 20°C
Overcast
Early-Evening
66°F 19°C
Overcast
Comfortable with temperatures reaching 69°F 20°C, overcast throughout the day, with steady humidity and steady pressure.
Friday, September 25, 2026
Mid-Morning
61°F 16°C
Overcast
Mid-Afternoon
68°F 20°C
Cloudy
Early-Evening
62°F 17°C
Overcast
Enjoyable around 68°F 20°C, overcast throughout the day, with lower humidity and steady pressure. Winds turning from the ENE to the E at 6 mph 9 km/h.
Saturday, September 26, 2026
Mid-Morning
56°F 13°C
Overcast
Mid-Afternoon
67°F 20°C
Partly Cloudy
Early-Evening
64°F 18°C
Cloudy
Refreshing around 67°F 20°C, cloudy through the afternoon, turning overcast this evening, with steady humidity and barometric pressure falling.
Sunday, September 27, 2026
Mid-Morning
59°F 15°C
Scattered Showers
Mid-Afternoon
56°F 13°C
Light Showers
Early-Evening
59°F 16°C
Overcast
Cool and brisk at 56°F 13°C, periods of heavy rain and gusty conditions, with increasing humidity and barometric pressure falling. Winds switching from the S to the SE at 11 mph 17 km/h. Gusts up to 30 mph 48 km/h.
Monday, September 28, 2026
Mid-Morning
68°F 20°C
Overcast
Mid-Afternoon
82°F 28°C
Cloudy
Early-Evening
79°F 26°C
Partly Cloudy
Warm and summery near 82°F 28°C, partly cloudy in the morning, cloudy in the afternoon, and overcast this evening, with steady humidity and steady pressure. Winds blowing from the S at 12 mph 19 km/h. Gusts up to 30 mph 48 km/h.
Tuesday, September 29, 2026
Mid-Morning
69°F 21°C
Scattered Showers
Mid-Afternoon
79°F 26°C
Overcast
Early-Evening
75°F 24°C
Overcast
Comfortable with temperatures reaching 79°F 26°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds swinging from the SSW to the SE at 6 mph 10 km/h.
Wednesday, September 30, 2026
Mid-Morning
66°F 19°C
Partly Cloudy
Mid-Afternoon
67°F 20°C
Partly Cloudy
Early-Evening
63°F 18°C
Cloudy
Refreshing around 67°F 20°C, cloudy through the afternoon, turning overcast this evening, with steady humidity and steady pressure. Winds shifting from the NNE to the NNW at 11 mph 17 km/h. Gusts up to 21 mph 34 km/h.
Thursday, October 1, 2026
Mid-Morning
49°F 9°C
Sunny
Mid-Afternoon
56°F 13°C
Sunny
Early-Evening
52°F 11°C
Sunny
Cool and brisk at 56°F 13°C, sunny throughout the day, with steady humidity and steady pressure. Winds turning from the NNW to the NW at 10 mph 15 km/h.
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