Coastal Storm Along the East Coast; Pacific Storm System in the West on Friday

A strengthening coastal storm will bring soaking rains to portions of the Mid-Atlantic and Northeast, with accumulating snow likely across the higher elevations of northern New England through Friday. A Pacific storm system will bring heavy low elevation rain, and gusty winds to northern California and the Pacific Northwest, as well as possible blizzard conditions to the Sierra Nevada on Friday. Read More >

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Mostly Cloudy

46°F

8°C

Humidity 62%
Wind Speed NW 16 G 26 mph
Barometer 29.99 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 12 Nov 1:50 pm CST
Extended Forecast for

Alton IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 50. North wind around 16 mph, with gusts as high as 24 mph.

    High: 50 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 32. Northwest wind 7 to 14 mph, with gusts as high as 22 mph.

    Low: 32 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 45. North wind 9 to 14 mph.

    High: 45 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 27. North wind 5 to 7 mph becoming calm  in the evening.

    Low: 27 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 48. Light north wind.

    High: 48 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 28.

    Low: 28 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 50. North wind around 16 mph, with gusts as high as 24 mph.
Tonight
Mostly clear, with a low around 32. Northwest wind 7 to 14 mph, with gusts as high as 22 mph.
Friday
Mostly sunny, with a high near 45. North wind 9 to 14 mph.
Friday Night
Mostly clear, with a low around 27. North wind 5 to 7 mph becoming calm in the evening.
Saturday
Sunny, with a high near 48. Light north wind.
Saturday Night
Clear, with a low around 28.
Sunday
Sunny, with a high near 50.
Sunday Night
Mostly clear, with a low around 30.
Monday
Sunny, with a high near 52.
Monday Night
Clear, with a low around 31.
Tuesday
Sunny, with a high near 55.
Tuesday Night
Clear, with a low around 32.
Wednesday
Sunny, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
Alton IL
 38.91°N 90.16°W (Elev. 505 ft)
12:26 pm CST Nov 12, 2026
2pm CST Nov 12, 2026-6pm CST Nov 18, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database