Sumner, WI Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Sumner, WI in one place.
Mostly sunny, with a high near 82. South wind 5 to 10 mph.
Local Weather Overview
This forecast page for Sumner, WI 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 23, 2026 10:32 PM CDT.
The active forecast window currently covers Jul 24 to Jul 30, 2026 for Sumner, WI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 24 to Jul 30, 2026
- Latest sync
- Jul 23, 2026 10:32 PM CDT
- Forecast office
- MPX
- Source
- NOAA / NWS
Daily Outlook
This Week in Sumner
Sunday looks like the warmest upcoming period in Sumner at 92 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 63 degrees F.
The strongest winds are forecast for Friday at about 5 to 10 mph S.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 23, 2026 10:32 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- MPX
- Radar station
- KMPX
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 65. South southwest wind around 10 mph.
Mostly sunny, with a high near 90. West southwest wind around 5 mph.
Mostly clear, with a low around 66. South southwest wind 0 to 5 mph.
A slight chance of showers and thunderstorms after 7am. Partly sunny, with a high near 92. South southwest wind 0 to 10 mph. Chance of precipitation is 20%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 69. South wind 5 to 10 mph. Chance of precipitation is 40%.
A slight chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 92. West wind 5 to 10 mph. Chance of precipitation is 20%.
Mostly clear, with a low around 65. North wind 0 to 10 mph.
Sunny, with a high near 88. North northwest wind 0 to 5 mph.
Mostly clear, with a low around 63. Northeast wind 0 to 5 mph.
Mostly sunny, with a high near 88. Southeast wind 0 to 5 mph.
Mostly clear, with a low around 63. East southeast wind 0 to 5 mph.
Mostly sunny, with a high near 88. West southwest wind 0 to 5 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jul 24
|
Mostly Sunny
|
82°F |
5 to 10 mph
S
|
|
Friday Night
Jul 24
|
Mostly Cloudy
|
65°F |
10 mph
SSW
|
|
Saturday
Jul 25
|
Mostly Sunny
|
90°F |
5 mph
WSW
|
|
Saturday Night
Jul 25
|
Mostly Clear
|
66°F |
0 to 5 mph
SSW
|
|
Sunday
Jul 26
|
Slight Chance Showers And Thunderstorms
|
92°F |
0 to 10 mph
SSW
|
|
Sunday Night
Jul 26
|
Chance Showers And Thunderstorms
|
69°F |
5 to 10 mph
S
|
|
Monday
Jul 27
|
Slight Chance Showers And Thunderstorms then Mostly Sunny
|
92°F |
5 to 10 mph
W
|
|
Monday Night
Jul 27
|
Mostly Clear
|
65°F |
0 to 10 mph
N
|
|
Tuesday
Jul 28
|
Sunny
|
88°F |
0 to 5 mph
NNW
|
|
Tuesday Night
Jul 28
|
Mostly Clear
|
63°F |
0 to 5 mph
NE
|
|
Wednesday
Jul 29
|
Mostly Sunny
|
88°F |
0 to 5 mph
SE
|
|
Wednesday Night
Jul 29
|
Mostly Clear
|
63°F |
0 to 5 mph
ESE
|
|
Thursday
Jul 30
|
Mostly Sunny
|
88°F |
0 to 5 mph
WSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sumner.