Sumner, MI Weather Forecast
Local 7-day forecast
Slight Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Sumner, MI in one place.
A slight chance of rain showers. Partly cloudy. Low around 65, with temperatures rising to around 67 overnight. Southwest wind around 12 mph, with gusts as high as 22 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
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: Oct 13, 2026 7:30 AM EDT.
The active forecast window currently covers Oct 13 to Oct 19, 2026 for Sumner, MI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 13 to Oct 19, 2026
- Latest sync
- Oct 13, 2026 7:30 AM EDT
- Forecast office
- GRR
- Source
- NOAA / NWS
Daily Outlook
This Week in Sumner
Tuesday looks like the warmest upcoming period in Sumner at 78 degrees F.
Friday Night is the coolest period ahead with temperatures near 31 degrees F.
The strongest winds are forecast for Friday at about 13 to 21 mph NW.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 13, 2026 7:30 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
Sunny. High near 78, with temperatures falling to around 75 in the afternoon. West southwest wind 12 to 17 mph, with gusts as high as 30 mph. New rainfall amounts less than a tenth of an inch possible.
A slight chance of rain showers between midnight and 5am. Partly cloudy. Low around 53, with temperatures rising to around 55 overnight. Northwest wind 1 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Partly sunny, with a high near 67. North wind 2 to 8 mph. New rainfall amounts less than a tenth of an inch possible.
Mostly cloudy, with a low around 43. Northeast wind around 7 mph.
A chance of rain showers after 2pm. Mostly cloudy, with a high near 62. Chance of precipitation is 50%.
Rain showers likely. Mostly cloudy, with a low around 45.
A chance of rain showers before 2pm. Partly sunny, with a high near 57.
Partly cloudy, with a low around 31.
Sunny, with a high near 56.
Clear, with a low around 34.
Sunny, with a high near 63.
Mostly clear, with a low around 43.
Mostly sunny, with a high near 66.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Oct 13
|
Slight Chance Rain Showers
|
65°F |
12 mph
SW
|
|
Tuesday
Oct 13
|
Sunny
|
78°F |
12 to 17 mph
WSW
|
|
Tuesday Night
Oct 13
|
Partly Cloudy then Slight Chance Rain Showers
|
53°F |
1 to 14 mph
NW
|
|
Wednesday
Oct 14
|
Partly Sunny
|
67°F |
2 to 8 mph
N
|
|
Wednesday Night
Oct 14
|
Mostly Cloudy
|
43°F |
7 mph
NE
|
|
Thursday
Oct 15
|
Mostly Cloudy then Chance Rain Showers
|
62°F |
5 to 8 mph
E
|
|
Thursday Night
Oct 15
|
Rain Showers Likely
|
45°F |
2 to 10 mph
N
|
|
Friday
Oct 16
|
Chance Rain Showers
|
57°F |
13 to 21 mph
NW
|
|
Friday Night
Oct 16
|
Partly Cloudy
|
31°F |
5 to 21 mph
NW
|
|
Saturday
Oct 17
|
Sunny
|
56°F |
5 to 12 mph
WNW
|
|
Saturday Night
Oct 17
|
Clear
|
34°F |
5 to 10 mph
WSW
|
|
Sunday
Oct 18
|
Sunny
|
63°F |
9 to 16 mph
SW
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
43°F |
9 to 15 mph
SW
|
|
Monday
Oct 19
|
Mostly Sunny
|
66°F |
10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sumner.