Foster Lake, IL 14 Day Weather
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Foster Lake, IL Weather Forecast


Foster Lake, IL Weather Forecast Dated: 1142 PM Wed Sep 23 2026
Expect a cool pattern with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate.
Wednesday, September 23, 2026
Mid-Morning
60°F 16°C
Overcast
Mid-Afternoon
70°F 21°C
Overcast
Early-Evening
64°F 18°C
Overcast
Pleasant near 70°F 21°C, overcast throughout the day, with steady humidity and steady pressure. Winds out of the NE at 11 mph 18 km/h.
Thursday, September 24, 2026
Mid-Morning
62°F 16°C
Overcast
Mid-Afternoon
76°F 24°C
Partly Cloudy
Early-Evening
69°F 21°C
Partly Cloudy
Comfortable with temperatures reaching 76°F 24°C, overcast in the morning, becoming partly cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds switching from the NE to the ENE at 6 mph 10 km/h.
Friday, September 25, 2026
Mid-Morning
63°F 17°C
Overcast
Mid-Afternoon
65°F 18°C
Overcast
Early-Evening
63°F 18°C
Overcast
Comfortable at 65°F 18°C, overcast throughout the day, with lower humidity and steady pressure. Winds moving from the E to the ENE at 8 mph 12 km/h.
Saturday, September 26, 2026
Mid-Morning
63°F 17°C
Overcast
Mid-Afternoon
64°F 18°C
Overcast
Early-Evening
62°F 17°C
Overcast
Cool with a high near 64°F 18°C, overcast throughout the day, with increasing humidity and steady pressure.
Sunday, September 27, 2026
Mid-Morning
60°F 16°C
Overcast
Mid-Afternoon
75°F 24°C
Overcast
Early-Evening
69°F 21°C
Overcast
Mild with a high of 75°F 24°C, overcast through the afternoon, turning cloudy this evening, with steady humidity and steady pressure.
Monday, September 28, 2026
Mid-Morning
62°F 17°C
Sunny
Mid-Afternoon
77°F 25°C
Overcast
Early-Evening
71°F 22°C
Cloudy
Pleasant near 77°F 25°C, sunny in the morning, cloudy in the afternoon, and partly cloudy this evening, with lower humidity and barometric pressure falling. Winds out of the SE at 9 mph 14 km/h.
Tuesday, September 29, 2026
Mid-Morning
62°F 17°C
Overcast
Mid-Afternoon
64°F 18°C
Light Rain
Early-Evening
67°F 20°C
Heavy Rain Showers
Comfortable at 64°F 18°C, drier morning followed by showers lasting through evening, with increasing humidity and barometric pressure falling. Winds shifting from the SSE to the S at 16 mph 25 km/h. Gusts up to 31 mph 50 km/h.
Wednesday, September 30, 2026
Mid-Morning
55°F 13°C
Light Showers
Mid-Afternoon
63°F 17°C
Cloudy
Early-Evening
60°F 16°C
Sunny
Cool with a high near 63°F 17°C, scattered morning showers before drying out later, with lower humidity and barometric pressure rising. Winds NW at 19 mph 31 km/h. Gusts up to 26 mph 41 km/h.
Thursday, October 1, 2026
Mid-Morning
57°F 14°C
Sunny
Mid-Afternoon
71°F 22°C
Sunny
Early-Evening
64°F 18°C
Sunny
Mild temperatures up to 71°F 22°C, sunny through the afternoon, turning overcast this evening, with lower humidity and steady pressure.
Friday, October 2, 2026
Mid-Morning
60°F 16°C
Overcast
Mid-Afternoon
72°F 22°C
Overcast
Early-Evening
66°F 19°C
Cloudy
Mild with a high of 72°F 22°C, overcast in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds switching from the SSE to the S at 8 mph 13 km/h.
Saturday, October 3, 2026
Mid-Morning
62°F 17°C
Partly Cloudy
Mid-Afternoon
73°F 23°C
Sunny
Early-Evening
63°F 17°C
Sunny
Pleasant near 73°F 23°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds moving from the NNW to the ESE at 13 mph 22 km/h. Gusts up to 25 mph 40 km/h.
Sunday, October 4, 2026
Mid-Morning
52°F 11°C
Sunny
Mid-Afternoon
57°F 14°C
Overcast
Early-Evening
48°F 9°C
Overcast
Crisp with a high near 57°F 14°C, cloudy in the morning, becoming overcast through the afternoon and evening, with increasing humidity and steady pressure. Winds swinging from the NNE to the SE at 15 mph 23 km/h. Gusts up to 26 mph 41 km/h.
Monday, October 5, 2026
Mid-Morning
47°F 8°C
Overcast
Mid-Afternoon
58°F 14°C
Partly Cloudy
Early-Evening
53°F 12°C
Sunny
Refreshing around 58°F 14°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds out of the SW at 13 mph 21 km/h.
Tuesday, October 6, 2026
Mid-Morning
49°F 10°C
Sunny
Mid-Afternoon
62°F 17°C
Sunny
Early-Evening
56°F 13°C
Sunny
Mildly cool near 62°F 17°C, sunny throughout the day, with lower humidity and steady pressure.
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