Bethalto, IL Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Bethalto, IL in one place.
Mostly sunny, with a high near 90. Southeast wind 2 to 8 mph.
Local Weather Overview
This forecast page for Bethalto, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Aug 27, 2026 8:28 PM CDT.
The active forecast window currently covers Aug 29 to Sep 3, 2026 for Bethalto, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 29 to Sep 3, 2026
- Latest sync
- Aug 27, 2026 8:28 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Bethalto
Monday looks like the warmest upcoming period in Bethalto at 98 degrees F.
Saturday Night is the coolest period ahead with temperatures near 70 degrees F.
The strongest winds are forecast for Sunday at about 7 to 12 mph S.
The forecast from Aug 29 through Sep 3 stays mostly dry.
Forecast Details
- Last updated
- Aug 27, 2026 8:28 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly cloudy, with a low around 70. South wind around 7 mph.
Sunny, with a high near 95.
Mostly clear, with a low around 74.
Sunny, with a high near 98.
Mostly clear, with a low around 78.
Sunny, with a high near 98.
Mostly clear, with a low around 78.
Sunny, with a high near 98.
Mostly clear, with a low around 79.
Sunny, with a high near 98.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Aug 29
|
Mostly Sunny
|
90°F |
2 to 8 mph
SE
|
|
Saturday Night
Aug 29
|
Partly Cloudy
|
70°F |
7 mph
S
|
|
Sunday
Aug 30
|
Sunny
|
95°F |
7 to 12 mph
S
|
|
Sunday Night
Aug 30
|
Mostly Clear
|
74°F |
10 mph
S
|
|
Monday
Aug 31
|
Sunny
|
98°F |
7 to 10 mph
S
|
|
Monday Night
Aug 31
|
Mostly Clear
|
78°F |
8 mph
S
|
|
Tuesday
Sep 1
|
Sunny
|
98°F |
8 mph
SW
|
|
Tuesday Night
Sep 1
|
Mostly Clear
|
78°F |
7 mph
S
|
|
Wednesday
Sep 2
|
Sunny
|
98°F |
5 to 8 mph
SW
|
|
Wednesday Night
Sep 2
|
Mostly Clear
|
79°F |
7 mph
S
|
|
Thursday
Sep 3
|
Sunny
|
98°F |
5 to 8 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Bethalto.
