Weather in Alton, Illinois, United States

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7-Day Detailed Weather Forecast for Alton

Overnight

Temperature: 42°F

Wind Speed: 0 mph

Wind Direction:

Forecast: Patchy fog after 5am. Clear, with a low around 42. Wind around 0 mph.

Monday

Temperature: 72°F

Wind Speed: 0 to 3 mph

Wind Direction: SE

Forecast: Areas of fog before 8am. Sunny. High near 72, with temperatures falling to around 67 in the afternoon. Southeast wind 0 to 3 mph.

Monday Night

Temperature: 46°F

Wind Speed: 1 mph

Wind Direction: E

Forecast: Partly cloudy, with a low around 46. East wind around 1 mph.

Tuesday

Temperature: 74°F

Wind Speed: 2 mph

Wind Direction: E

Forecast: Sunny. High near 74, with temperatures falling to around 69 in the afternoon. East wind around 2 mph.

Tuesday Night

Temperature: 45°F

Wind Speed: 0 mph

Wind Direction:

Forecast: Mostly clear, with a low around 45. Wind around 0 mph.

Wednesday

Temperature: 77°F

Wind Speed: 0 mph

Wind Direction:

Forecast: Sunny, with a high near 77.

Wednesday Night

Temperature: 48°F

Wind Speed: 0 mph

Wind Direction:

Forecast: Clear, with a low around 48.

Thursday

Temperature: 79°F

Wind Speed: 0 to 3 mph

Wind Direction: E

Forecast: Sunny, with a high near 79.

Thursday Night

Temperature: 49°F

Wind Speed: 2 mph

Wind Direction: E

Forecast: Clear, with a low around 49.

Friday

Temperature: 78°F

Wind Speed: 3 to 8 mph

Wind Direction: SE

Forecast: Sunny, with a high near 78.

Friday Night

Temperature: 50°F

Wind Speed: 7 mph

Wind Direction: SE

Forecast: Mostly clear, with a low around 50.

Saturday

Temperature: 80°F

Wind Speed: 5 to 9 mph

Wind Direction: SE

Forecast: Mostly sunny, with a high near 80.

Saturday Night

Temperature: 53°F

Wind Speed: 3 to 8 mph

Wind Direction: S

Forecast: Partly cloudy, with a low around 53.

Sunday

Temperature: 80°F

Wind Speed: 6 mph

Wind Direction: S

Forecast: Mostly sunny, with a high near 80.