Potomac, IL 14 Day Weather - 61812 WeatherWorld.com
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Potomac, IL Weather Forecast


Potomac, IL Weather Forecast Dated: 846 PM Thu Sep 03 2026
Expect a very warm period with plenty of sunshine and occasional showers over the coming period. generally humid conditions and no major pressure swings will dominate.
Thursday, September 3, 2026
Mid-Morning
81°F 27°C
Sunny
Mid-Afternoon
95°F 35°C
Sunny
Early-Evening
86°F 30°C
Sunny
Sizzling hot near 95°F 35°C with a heat index reaching 105°F 40°C, sunny throughout the day, with lower humidity and steady pressure. Winds turning from the SW to the SSE at 6 mph 10 km/h.
Friday, September 4, 2026
Mid-Morning
81°F 27°C
Sunny
Mid-Afternoon
88°F 31°C
Nearby Thunderstorms
Early-Evening
85°F 30°C
Partly Cloudy
Quite warm reaching 88°F 31°C, feeling like 95°F 35°C during peak afternoon, locally heavy thunderstorms at times, with steady humidity and steady pressure. Winds switching from the WSW to the S at 3 mph 5 km/h.
Saturday, September 5, 2026
Mid-Morning
71°F 22°C
Scattered Showers
Mid-Afternoon
86°F 30°C
Sunny
Early-Evening
80°F 27°C
Sunny
Very warm near 86°F 30°C, though humidity makes it feel like 93°F 34°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds moving from the SSE to the NE at 9 mph 13 km/h.
Sunday, September 6, 2026
Mid-Morning
68°F 20°C
Sunny
Mid-Afternoon
76°F 25°C
Sunny
Early-Evening
70°F 21°C
Sunny
Mild temperatures up to 76°F 25°C, sunny throughout the day, with steady humidity and steady pressure. Winds swinging from the ENE to the E at 9 mph 13 km/h.
Monday, September 7, 2026
Mid-Morning
63°F 17°C
Partly Cloudy
Mid-Afternoon
75°F 24°C
Sunny
Early-Evening
70°F 21°C
Sunny
Mild with a high of 75°F 24°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds blowing from the ENE at 8 mph 13 km/h.
Tuesday, September 8, 2026
Mid-Morning
68°F 20°C
Partly Cloudy
Mid-Afternoon
82°F 28°C
Sunny
Early-Evening
80°F 27°C
Sunny
Warm and summery near 82°F 28°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and barometric pressure falling. Winds turning from the SSE to the SE at 8 mph 13 km/h.
Wednesday, September 9, 2026
Mid-Morning
81°F 27°C
Overcast
Mid-Afternoon
87°F 30°C
Partly Cloudy
Early-Evening
79°F 27°C
Overcast
Warm and summery around 87°F 30°C (feels like 93°F 34°C), partly cloudy in the morning, overcast in the afternoon, and partly cloudy this evening, with increasing humidity and steady pressure. Winds switching from the SW to the ESE at 7 mph 12 km/h.
Thursday, September 10, 2026
Mid-Morning
74°F 23°C
Partly Cloudy
Mid-Afternoon
85°F 29°C
Overcast
Early-Evening
79°F 26°C
Partly Cloudy
Quite warm around 85°F 29°C, overcast in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds moving from the ESE to the E at 8 mph 12 km/h.
Friday, September 11, 2026
Mid-Morning
72°F 22°C
Cloudy
Mid-Afternoon
83°F 28°C
Sunny
Early-Evening
79°F 26°C
Partly Cloudy
Very warm near 83°F 28°C, though humidity makes it feel like 86°F 30°C, partly cloudy throughout the day, with steady humidity and steady pressure. Winds E at 9 mph 14 km/h. Gusts up to 21 mph 35 km/h.
Saturday, September 12, 2026
Mid-Morning
75°F 24°C
Overcast
Mid-Afternoon
92°F 34°C
Sunny
Early-Evening
83°F 29°C
Nearby Thunderstorms
Sizzling hot near 92°F 34°C with a heat index reaching 100°F 38°C, periods of heavy thunderstorms, with steady humidity and steady pressure. Winds shifting from the SSE to the ESE at 10 mph 16 km/h. Gusts up to 22 mph 35 km/h.
Sunday, September 13, 2026
Mid-Morning
82°F 28°C
Sunny
Mid-Afternoon
92°F 34°C
Sunny
Early-Evening
82°F 28°C
Sunny
Hot and sweltering around 92°F 34°C (heat index 98°F 36°C), sunny through the afternoon, turning cloudy this evening, with increasing humidity and steady pressure. Winds turning from the WSW to the SSW at 8 mph 13 km/h.
Monday, September 14, 2026
Mid-Morning
76°F 24°C
Scattered Showers
Mid-Afternoon
89°F 31°C
Overcast
Early-Evening
79°F 26°C
Overcast
Very warm near 89°F 31°C, though humidity makes it feel like 95°F 35°C, locally heavy downpours at times, with steady humidity and barometric pressure falling. Winds switching from the SSW to the SW at 4 mph 6 km/h.
Tuesday, September 15, 2026
Mid-Morning
64°F 18°C
Sunny
Mid-Afternoon
71°F 22°C
Sunny
Early-Evening
65°F 18°C
Sunny
Enjoyable around 71°F 22°C, sunny throughout the day, with steady humidity and steady pressure. Winds moving from the W to the NW at 9 mph 15 km/h.
Wednesday, September 16, 2026
Mid-Morning
59°F 15°C
Sunny
Mid-Afternoon
67°F 19°C
Sunny
Early-Evening
63°F 17°C
Sunny
Mildly cool near 67°F 19°C, sunny through the afternoon, turning cloudy this evening, with steady humidity and steady pressure. Winds swinging from the NW to the ESE at 7 mph 11 km/h.
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