Alton, IA Weather Forecast
Local 7-day forecast
Mostly Sunny then Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Alton, IA in one place.
A chance of rain showers after 1pm. Mostly sunny, with a high near 81. Chance of precipitation is 30%.
Local Weather Overview
This forecast page for Alton, IA 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 9, 2026 6:40 PM CDT.
The active forecast window currently covers Apr 13 to Apr 15, 2026 for Alton, IA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 13 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 6:40 PM CDT
- Forecast office
- FSD
- Source
- NOAA / NWS
Daily Outlook
This Week in Alton
Monday looks like the warmest upcoming period in Alton at 81 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 44 degrees F.
The strongest winds are forecast for Monday at about 10 to 15 mph S.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 6:40 PM CDT
- Coverage
- 3 days
- Time zone
- America/Chicago
- Forecast office
- FSD
- Radar station
- KFSD
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 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 52. Chance of precipitation is 40%.
A slight chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 74. Chance of precipitation is 50%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.
A chance of rain showers. Partly sunny, with a high near 66. Chance of precipitation is 40%.
A chance of rain showers before 1am. Partly cloudy, with a low around 45. Chance of precipitation is 40%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Monday
Apr 13
|
Mostly Sunny then Chance Rain Showers
|
81°F |
10 to 15 mph
S
|
|
Monday Night
Apr 13
|
Chance Showers And Thunderstorms
|
52°F |
10 to 15 mph
SSE
|
|
Tuesday
Apr 14
|
Slight Chance Showers And Thunderstorms
|
74°F |
10 to 15 mph
SSE
|
|
Tuesday Night
Apr 14
|
Showers And Thunderstorms Likely
|
44°F |
10 to 15 mph
NNW
|
|
Wednesday
Apr 15
|
Chance Rain Showers
|
66°F |
10 to 15 mph
WNW
|
|
Wednesday Night
Apr 15
|
Chance Rain Showers
|
45°F |
10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Alton.