Alton, MO Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Alton, MO in one place.
Mostly sunny, with a high near 80. South wind 5 to 13 mph, with gusts as high as 26 mph.
Local Weather Overview
This forecast page for Alton, MO 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: Apr 22, 2026 12:41 PM CDT.
The active forecast window currently covers Apr 23 to Apr 28, 2026 for Alton, MO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 23 to Apr 28, 2026
- Latest sync
- Apr 22, 2026 12:41 PM CDT
- Forecast office
- SGF
- Source
- NOAA / NWS
Daily Outlook
This Week in Alton
Monday looks like the warmest upcoming period in Alton at 81 degrees F.
Monday Night is the coolest period ahead with temperatures near 49 degrees F.
The strongest winds are forecast for Thursday at about 5 to 13 mph S.
Precipitation is mentioned in 11 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 22, 2026 12:41 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- SGF
- Radar station
- KSGF
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 between 1am and 4am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 61. South wind around 12 mph, with gusts as high as 25 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of showers and thunderstorms before 7am, then showers and thunderstorms. Mostly cloudy, with a high near 75. South wind 7 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Showers and thunderstorms. Mostly cloudy, with a low around 54. Chance of precipitation is 90%.
A chance of rain showers. Mostly sunny, with a high near 78.
A chance of rain showers before 1am, then a slight chance of showers and thunderstorms. Partly cloudy, with a low around 53.
A chance of showers and thunderstorms. Partly sunny, with a high near 77.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 59.
A chance of showers and thunderstorms before 1pm, then showers and thunderstorms likely. Partly sunny, with a high near 81.
Showers and thunderstorms likely before 1am. Partly cloudy, with a low around 49.
A slight chance of rain showers after 1pm. Sunny, with a high near 75.
A slight chance of rain showers. Partly cloudy, with a low around 50.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Apr 23
|
Mostly Sunny
|
80°F |
5 to 13 mph
S
|
|
Thursday Night
Apr 23
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
61°F |
12 mph
S
|
|
Friday
Apr 24
|
Chance Showers And Thunderstorms then Showers And Thunderstorms
|
75°F |
7 to 10 mph
S
|
|
Friday Night
Apr 24
|
Showers And Thunderstorms
|
54°F |
6 mph
NW
|
|
Saturday
Apr 25
|
Chance Rain Showers
|
78°F |
7 mph
NE
|
|
Saturday Night
Apr 25
|
Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
53°F |
6 mph
E
|
|
Sunday
Apr 26
|
Chance Showers And Thunderstorms
|
77°F |
5 to 9 mph
E
|
|
Sunday Night
Apr 26
|
Chance Showers And Thunderstorms
|
59°F |
10 mph
SE
|
|
Monday
Apr 27
|
Chance Showers And Thunderstorms
|
81°F |
13 mph
SW
|
|
Monday Night
Apr 27
|
Showers And Thunderstorms Likely
|
49°F |
5 to 10 mph
W
|
|
Tuesday
Apr 28
|
Sunny then Slight Chance Rain Showers
|
75°F |
5 mph
NW
|
|
Tuesday Night
Apr 28
|
Slight Chance Rain Showers
|
50°F |
3 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Alton.