Current conditions at
St. Louis Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Fair
63°F
17°C
| Humidity | 88% |
| Wind Speed | SE 3 mph |
| Barometer | 29.95 in |
| Dewpoint | 59°F (15°C) |
| Visibility | 10.00 mi |
| Last update | 17 Apr 12:55 am CDT |
Extended Forecast for
Bethalto IL
Overnight

Low: 58 °F
Mostly Clear
Friday
High: 83 °F
Mostly Sunny
then Isolated
T-stormsFriday Night

Low: 49 °F
T-storms
Saturday

High: 54 °F
Showers
LikelySaturday Night

Low: 38 °F
Mostly Clear
Sunday

High: 64 °F
Sunny
Sunday Night

Low: 40 °F
Mostly Clear
Monday

High: 71 °F
Sunny
Monday Night

Low: 52 °F
Mostly Clear
Detailed Forecast
Overnight
Mostly clear, with a low around 58. Southeast wind around 5 mph.
Friday
Isolated showers and thunderstorms after 4pm. Mostly sunny, with a high near 83. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 20%.
Friday Night
Showers and thunderstorms, mainly before 1am, then showers and possibly a thunderstorm after 1am. Low around 49. South wind 13 to 15 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 100%.
Saturday
Showers likely, mainly before 7am. Mostly cloudy, then gradually becoming sunny, with a steady temperature around 54. Northwest wind 15 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Saturday Night
Mostly clear, with a low around 38. Northwest wind 6 to 14 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 64.
Sunday Night
Mostly clear, with a low around 40.
Monday
Sunny, with a high near 71.
Monday Night
Mostly clear, with a low around 52.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
Partly cloudy, with a low around 56.
Wednesday
Mostly sunny, with a high near 78.
Wednesday Night
A 20 percent chance of showers. Mostly clear, with a low around 56.
Thursday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 78.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Bethalto IL
38.88°N 90.02°W (Elev. 499 ft)
38.88°N 90.02°W (Elev. 499 ft)
12:51 am CDT Apr 17, 2026
1am CDT Apr 17, 2026-6pm CDT Apr 23, 2026


