Bethalto, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Bethalto, IL in one place.
Showers and thunderstorms before 3pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Southwest wind around 12 mph. Chance of precipitation is 80%.
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: Oct 15, 2026 3:39 PM CDT.
The active forecast window currently covers Oct 15 to Oct 21, 2026 for Bethalto, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 3:39 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Bethalto
This Afternoon looks like the warmest upcoming period in Bethalto at 80 degrees F.
Saturday Night is the coolest period ahead with temperatures near 36 degrees F.
The strongest winds are forecast for Friday at about 17 to 21 mph NW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 3:39 PM CDT
- Coverage
- 7 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
A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely between 7pm and 3am. Mostly cloudy. Low around 46, with temperatures rising to around 50 overnight. West wind 10 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
A slight chance of rain showers after 3pm. Partly sunny, with a high near 57. Northwest wind 17 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Partly cloudy, with a low around 38. North wind 7 to 20 mph, with gusts as high as 29 mph.
Sunny, with a high near 61. North wind 2 to 6 mph.
Clear, with a low around 36.
Sunny, with a high near 68.
Mostly clear, with a low around 39.
Mostly sunny, with a high near 72.
Partly cloudy, with a low around 44.
Mostly sunny, with a high near 77.
Mostly clear, with a low around 47.
Sunny, with a high near 79.
Mostly clear, with a low around 49.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Oct 15
|
Showers And Thunderstorms
|
80°F |
12 mph
SW
|
|
Tonight
Oct 15
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
46°F |
10 to 17 mph
W
|
|
Friday
Oct 16
|
Partly Sunny then Slight Chance Rain Showers
|
57°F |
17 to 21 mph
NW
|
|
Friday Night
Oct 16
|
Partly Cloudy
|
38°F |
7 to 20 mph
N
|
|
Saturday
Oct 17
|
Sunny
|
61°F |
2 to 6 mph
N
|
|
Saturday Night
Oct 17
|
Clear
|
36°F |
2 mph
E
|
|
Sunday
Oct 18
|
Sunny
|
68°F |
2 to 7 mph
S
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
39°F |
1 to 6 mph
SE
|
|
Monday
Oct 19
|
Mostly Sunny
|
72°F |
1 to 5 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
44°F |
0 to 3 mph
SE
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
77°F |
0 to 5 mph
SE
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
47°F |
2 mph
E
|
|
Wednesday
Oct 21
|
Sunny
|
79°F |
1 to 5 mph
SE
|
|
Wednesday Night
Oct 21
|
Mostly Clear
|
49°F |
3 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Bethalto.
