Alton, MO Weather Forecast
Local 7-day forecast
Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Alton, MO in one place.
A chance of rain showers after 2am. Mostly cloudy, with a low around 65. East wind around 2 mph. Chance of precipitation is 40%.
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: Jul 24, 2026 3:06 AM CDT.
The active forecast window currently covers Jul 24 to Jul 30, 2026 for Alton, MO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 24 to Jul 30, 2026
- Latest sync
- Jul 24, 2026 3:06 AM CDT
- Forecast office
- SGF
- Source
- NOAA / NWS
Daily Outlook
This Week in Alton
Tuesday looks like the warmest upcoming period in Alton at 101 degrees F.
Overnight is the coolest period ahead with temperatures near 65 degrees F.
The strongest winds are forecast for Monday at about 2 to 6 mph SW.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 24, 2026 3:06 AM CDT
- Coverage
- 7 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 rain showers before 4pm, then a slight chance of showers and thunderstorms. Partly sunny. High near 85, with temperatures falling to around 83 in the afternoon. Southeast wind around 3 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 2am, then a chance of showers and thunderstorms between 2am and 4am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Southeast wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of showers and thunderstorms. Partly sunny, with a high near 93. Heat index values as high as 103. South wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 73. Southwest wind around 2 mph. Chance of precipitation is 30%.
Sunny, with a high near 98.
Mostly clear, with a low around 74.
Sunny, with a high near 100.
Mostly clear, with a low around 76.
Sunny, with a high near 101.
Mostly clear, with a low around 74.
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 96.
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 73.
A slight chance of showers and thunderstorms between 7am and 1pm. Mostly sunny, with a high near 94.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Jul 24
|
Chance Rain Showers
|
65°F |
2 mph
E
|
|
Friday
Jul 24
|
Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
85°F |
3 mph
SE
|
|
Friday Night
Jul 24
|
Chance Showers And Thunderstorms
|
70°F |
5 mph
SE
|
|
Saturday
Jul 25
|
Chance Showers And Thunderstorms
|
93°F |
5 mph
S
|
|
Saturday Night
Jul 25
|
Chance Showers And Thunderstorms then Partly Cloudy
|
73°F |
2 mph
SW
|
|
Sunday
Jul 26
|
Sunny
|
98°F |
2 mph
W
|
|
Sunday Night
Jul 26
|
Mostly Clear
|
74°F |
2 mph
S
|
|
Monday
Jul 27
|
Sunny
|
100°F |
2 to 6 mph
SW
|
|
Monday Night
Jul 27
|
Mostly Clear
|
76°F |
5 mph
SW
|
|
Tuesday
Jul 28
|
Sunny
|
101°F |
6 mph
W
|
|
Tuesday Night
Jul 28
|
Mostly Clear
|
74°F |
3 mph
NW
|
|
Wednesday
Jul 29
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
96°F |
5 mph
E
|
|
Wednesday Night
Jul 29
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
73°F |
3 mph
E
|
|
Thursday
Jul 30
|
Slight Chance Showers And Thunderstorms
|
94°F |
5 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Alton.