Sumner, MI Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Sumner, MI in one place.
Sunny, with a high near 102. Heat index values as high as 105. West wind 8 to 13 mph.
Local Weather Overview
This forecast page for Sumner, MI 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 14, 2026 12:26 AM EDT.
The active forecast window currently covers Jul 14 to Jul 20, 2026 for Sumner, MI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 14 to Jul 20, 2026
- Latest sync
- Jul 14, 2026 12:26 AM EDT
- Forecast office
- GRR
- Source
- NOAA / NWS
Daily Outlook
This Week in Sumner
Tuesday looks like the warmest upcoming period in Sumner at 102 degrees F.
Sunday Night is the coolest period ahead with temperatures near 60 degrees F.
The strongest winds are forecast for Saturday at about 9 to 15 mph WNW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 14, 2026 12:26 AM EDT
- Coverage
- 7 days
- Time zone
- America/Detroit
- Forecast office
- GRR
- Radar station
- KGRR
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 73. Heat index values as high as 102. West wind 7 to 13 mph, with gusts as high as 24 mph.
Mostly sunny, with a high near 98. Heat index values as high as 101. West northwest wind 5 to 9 mph, with gusts as high as 20 mph.
Mostly clear, with a low around 67. North wind 2 to 10 mph, with gusts as high as 22 mph.
Sunny, with a high near 94.
Mostly clear, with a low around 67.
Mostly sunny, with a high near 92.
A chance of rain showers between 8pm and 2am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 68.
A chance of showers and thunderstorms before 8am, then a chance of showers and thunderstorms between 8am and 2pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 88.
A chance of showers and thunderstorms. Partly cloudy, with a low around 63.
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84.
A slight chance of showers and thunderstorms. Mostly clear, with a low around 60.
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 81.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jul 14
|
Sunny
|
102°F |
8 to 13 mph
W
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
73°F |
7 to 13 mph
W
|
|
Wednesday
Jul 15
|
Mostly Sunny
|
98°F |
5 to 9 mph
WNW
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
67°F |
2 to 10 mph
N
|
|
Thursday
Jul 16
|
Sunny
|
94°F |
2 to 8 mph
NW
|
|
Thursday Night
Jul 16
|
Mostly Clear
|
67°F |
5 to 10 mph
N
|
|
Friday
Jul 17
|
Mostly Sunny
|
92°F |
5 to 13 mph
SSE
|
|
Friday Night
Jul 17
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
68°F |
7 to 13 mph
S
|
|
Saturday
Jul 18
|
Chance Showers And Thunderstorms
|
88°F |
9 to 15 mph
WNW
|
|
Saturday Night
Jul 18
|
Chance Showers And Thunderstorms
|
63°F |
7 to 15 mph
NNE
|
|
Sunday
Jul 19
|
Slight Chance Showers And Thunderstorms
|
84°F |
7 to 10 mph
NE
|
|
Sunday Night
Jul 19
|
Slight Chance Showers And Thunderstorms
|
60°F |
5 to 10 mph
E
|
|
Monday
Jul 20
|
Slight Chance Showers And Thunderstorms
|
81°F |
6 to 12 mph
WSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sumner.