Sumner, IA Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Sumner, IA in one place.
Mostly sunny, with a high near 77. Northwest wind 14 to 21 mph, with gusts as high as 29 mph.
Local Weather Overview
This forecast page for Sumner, 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: Jul 21, 2026 1:46 AM CDT.
The active forecast window currently covers Jul 21 to Jul 27, 2026 for Sumner, IA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 21 to Jul 27, 2026
- Latest sync
- Jul 21, 2026 1:46 AM CDT
- Forecast office
- DMX
- Source
- NOAA / NWS
Daily Outlook
This Week in Sumner
Sunday looks like the warmest upcoming period in Sumner at 90 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Tuesday at about 14 to 21 mph NW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 21, 2026 1:46 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- DMX
- Radar station
- KARX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 56. North wind 7 to 16 mph, with gusts as high as 23 mph.
Sunny, with a high near 73. North northeast wind around 6 mph.
Mostly clear, with a low around 54. Southeast wind 1 to 5 mph.
Sunny, with a high near 77.
Mostly cloudy, with a low around 58.
Partly sunny, with a high near 77.
Mostly clear, with a low around 60.
Sunny, with a high near 83.
Mostly clear, with a low around 66.
Sunny, with a high near 90.
A slight chance of showers and thunderstorms after 7pm. Mostly clear, with a low around 69.
A slight chance of showers and thunderstorms before 7am. Sunny, with a high near 87.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jul 21
|
Mostly Sunny
|
77°F |
14 to 21 mph
NW
|
|
Tuesday Night
Jul 21
|
Mostly Clear
|
56°F |
7 to 16 mph
N
|
|
Wednesday
Jul 22
|
Sunny
|
73°F |
6 mph
NNE
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
54°F |
1 to 5 mph
SE
|
|
Thursday
Jul 23
|
Sunny
|
77°F |
5 mph
SSW
|
|
Thursday Night
Jul 23
|
Mostly Cloudy
|
58°F |
5 mph
S
|
|
Friday
Jul 24
|
Partly Sunny
|
77°F |
5 to 9 mph
S
|
|
Friday Night
Jul 24
|
Mostly Clear
|
60°F |
8 mph
SSE
|
|
Saturday
Jul 25
|
Sunny
|
83°F |
6 to 10 mph
S
|
|
Saturday Night
Jul 25
|
Mostly Clear
|
66°F |
9 mph
SSW
|
|
Sunday
Jul 26
|
Sunny
|
90°F |
7 to 10 mph
SW
|
|
Sunday Night
Jul 26
|
Slight Chance Showers And Thunderstorms
|
69°F |
9 mph
SSW
|
|
Monday
Jul 27
|
Slight Chance Showers And Thunderstorms then Sunny
|
87°F |
7 to 12 mph
WNW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sumner.
