Alton, IA Weather Forecast
Local 7-day forecast
Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Alton, IA in one place.
Rain showers and patchy fog before 5pm. Cloudy. High near 52, with temperatures falling to around 49 in the afternoon. Northwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts less than a tenth of an inch possible.
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: Oct 15, 2026 3:46 PM CDT.
The active forecast window currently covers Oct 15 to Oct 21, 2026 for Alton, IA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 3:46 PM CDT
- Forecast office
- FSD
- Source
- NOAA / NWS
Daily Outlook
This Week in Alton
Wednesday looks like the warmest upcoming period in Alton at 73 degrees F.
Friday Night is the coolest period ahead with temperatures near 31 degrees F.
The strongest winds are forecast for Tonight at about 20 to 25 mph NW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 3:46 PM CDT
- Coverage
- 7 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
Mostly cloudy, with a low around 41. Northwest wind 20 to 25 mph, with gusts as high as 35 mph. New rainfall amounts less than a tenth of an inch possible.
Partly sunny, with a high near 51. North northwest wind 10 to 25 mph, with gusts as high as 40 mph.
Widespread frost after 9pm. Clear, with a low around 31. West northwest wind 0 to 10 mph.
Widespread frost before 8am. Sunny, with a high near 59. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Clear, with a low around 42. South wind around 15 mph, with gusts as high as 25 mph.
Sunny, with a high near 66.
Mostly clear, with a low around 44.
Mostly sunny, with a high near 66.
Partly cloudy, with a low around 47.
Sunny, with a high near 71.
Mostly clear, with a low around 53.
A slight chance of rain showers after 1pm. Mostly sunny, with a high near 73.
A slight chance of rain showers. Partly cloudy, with a low around 56.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Oct 15
|
Rain Showers
|
52°F |
15 mph
NW
|
|
Tonight
Oct 15
|
Mostly Cloudy
|
41°F |
20 to 25 mph
NW
|
|
Friday
Oct 16
|
Partly Sunny
|
51°F |
10 to 25 mph
NNW
|
|
Friday Night
Oct 16
|
Widespread Frost
|
31°F |
0 to 10 mph
WNW
|
|
Saturday
Oct 17
|
Widespread Frost then Sunny
|
59°F |
5 to 15 mph
SSW
|
|
Saturday Night
Oct 17
|
Clear
|
42°F |
15 mph
S
|
|
Sunday
Oct 18
|
Sunny
|
66°F |
10 to 15 mph
SSW
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
44°F |
5 to 10 mph
S
|
|
Monday
Oct 19
|
Mostly Sunny
|
66°F |
5 mph
SSE
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
47°F |
5 mph
SSE
|
|
Tuesday
Oct 20
|
Sunny
|
71°F |
5 to 10 mph
SSE
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
53°F |
5 to 10 mph
SE
|
|
Wednesday
Oct 21
|
Mostly Sunny then Slight Chance Rain Showers
|
73°F |
10 to 15 mph
SSE
|
|
Wednesday Night
Oct 21
|
Slight Chance Rain Showers
|
56°F |
10 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Alton.