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Petrolia, IL Weather Forecast
Petrolia, IL Weather Forecast Dated: 1150 AM Thu Oct 08 2026
Expect a mild stretch with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and a stable pattern will dominate.
Thursday, October 8, 2026
Mid-Morning
67°F 19°C
Sunny
Mid-Afternoon
83°F 28°C
Sunny
Early-Evening
70°F 22°C
Sunny
Warm and summery near 83°F 28°C, sunny throughout the day, with lower humidity and steady pressure.
Friday, October 9, 2026
Mid-Morning
67°F 19°C
Sunny
Mid-Afternoon
87°F 31°C
Sunny
Early-Evening
74°F 24°C
Sunny
Balmy with temperatures reaching 87°F 31°C, sunny through the afternoon, turning cloudy this evening, with lower humidity and steady pressure. Winds out of the S at 9 mph 14 km/h.
Saturday, October 10, 2026
Mid-Morning
69°F 21°C
Overcast
Mid-Afternoon
76°F 25°C
Overcast
Early-Evening
67°F 20°C
Cloudy
Enjoyable around 76°F 25°C, overcast throughout the day, with steady humidity and steady pressure. Winds building from SE at 6 mph 9 km/h to E at 14 mph 23 km/h. Gusts up to 29 mph 47 km/h.
Sunday, October 11, 2026
Mid-Morning
60°F 16°C
Light Rain
Mid-Afternoon
65°F 18°C
Partly Cloudy
Early-Evening
66°F 19°C
Overcast
Cool with a high near 65°F 18°C, early showers breaking for a drier afternoon, with lower humidity and steady pressure.
Monday, October 12, 2026
Mid-Morning
67°F 20°C
Sunny
Mid-Afternoon
89°F 32°C
Sunny
Early-Evening
78°F 26°C
Sunny
Very warm with a high of 89°F 32°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds SSW at 12 mph 19 km/h. Gusts up to 30 mph 47 km/h.
Tuesday, October 13, 2026
Mid-Morning
77°F 25°C
Sunny
Mid-Afternoon
86°F 30°C
Scattered Showers
Early-Evening
76°F 24°C
Overcast
Warm and summery near 86°F 30°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds swinging from the WSW to the NNE at 10 mph 15 km/h.
Wednesday, October 14, 2026
Mid-Morning
66°F 19°C
Overcast
Mid-Afternoon
83°F 29°C
Partly Cloudy
Early-Evening
78°F 26°C
Sunny
Balmy with temperatures reaching 83°F 29°C, cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and barometric pressure falling. Winds shifting from the E to the SE at 10 mph 16 km/h. Gusts up to 20 mph 32 km/h.
Thursday, October 15, 2026
Mid-Morning
81°F 27°C
Sunny
Mid-Afternoon
94°F 34°C
Sunny
Early-Evening
86°F 30°C
Partly Cloudy
Sizzling hot with 94°F 34°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and steady pressure. Winds SSW at 18 mph 30 km/h. Gusts up to 29 mph 47 km/h.
Friday, October 16, 2026
Mid-Morning
76°F 25°C
Drizzle
Mid-Afternoon
70°F 21°C
Light Showers
Early-Evening
61°F 17°C
Scattered Showers
Mild temperatures up to 70°F 21°C, locally heavy downpours at times, with steady humidity and barometric pressure rising. Winds switching from the SW to the NNW at 14 mph 22 km/h. Gusts up to 24 mph 39 km/h.
Saturday, October 17, 2026
Mid-Morning
56°F 13°C
Partly Cloudy
Mid-Afternoon
64°F 18°C
Sunny
Early-Evening
55°F 13°C
Sunny
Mildly cool near 64°F 18°C, cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds moving from the NNE to the NE at 12 mph 19 km/h. Gusts up to 24 mph 39 km/h.
Sunday, October 18, 2026
Mid-Morning
49°F 9°C
Cloudy
Mid-Afternoon
67°F 19°C
Sunny
Early-Evening
59°F 15°C
Sunny
Comfortable at 67°F 19°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and barometric pressure falling. Winds swinging from the E to the ESE at 8 mph 12 km/h.
Monday, October 19, 2026
Mid-Morning
55°F 13°C
Overcast
Mid-Afternoon
65°F 18°C
Scattered Showers
Early-Evening
63°F 18°C
Scattered Showers
Cool with a high near 65°F 18°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds shifting from the SSE to the S at 8 mph 13 km/h.
Tuesday, October 20, 2026
Mid-Morning
64°F 18°C
Overcast
Mid-Afternoon
72°F 22°C
Cloudy
Early-Evening
65°F 18°C
Overcast
Enjoyable around 72°F 22°C, overcast throughout the day, with steady humidity and steady pressure. Winds turning from the SW to the SSW at 12 mph 20 km/h. Gusts up to 23 mph 36 km/h.
Wednesday, October 21, 2026
Mid-Morning
64°F 18°C
Light Fog
Mid-Afternoon
76°F 24°C
Partly Cloudy
Early-Evening
69°F 21°C
Sunny
Mild temperatures up to 76°F 24°C, partly cloudy throughout the day, with lower humidity and steady pressure. Winds SW at 10 mph 16 km/h.
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