Allegan County, MI Weather Forecast
County weather hub
Showers And Thunderstorms Likely
Compare major city weather across Allegan County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Showers and thunderstorms likely after 11pm. Mostly cloudy. Low around 55, with temperatures rising to around 57 overnight. North wind around 1 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
County Weather Overview
This county weather page brings together forecast coverage for Allegan County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 8 of 8 mapped cities in Allegan County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Oct 13 to Oct 20, 2026
- Latest sync
- Oct 13, 2026 11:30 PM EDT
- Forecast office
- GRR
- Source
- NOAA / NWS
Daily Outlook
This Week in Allegan County
Wednesday looks like the warmest upcoming period in Allegan County at 69 degrees F.
Friday Night is the coolest period ahead with temperatures near 33 degrees F.
The strongest winds are forecast for Friday at about 18 mph NW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 13, 2026 11:30 PM 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
A chance of rain showers before 8am. Mostly cloudy. High near 69, with temperatures falling to around 67 in the afternoon. North northeast wind 0 to 6 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Mostly cloudy. Low around 47, with temperatures rising to around 50 overnight. Northeast wind around 6 mph.
A chance of rain showers between 7am and 2pm, then showers and thunderstorms. Mostly cloudy, with a high near 64. East wind around 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Rain showers. Cloudy, with a low around 45. West southwest wind 3 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.
Rain showers likely. Mostly cloudy, with a high near 56. Chance of precipitation is 70%.
A chance of rain showers before 8pm. Partly cloudy, with a low around 33.
Sunny, with a high near 55.
Mostly clear, with a low around 36.
Sunny, with a high near 63.
Partly cloudy, with a low around 44.
Partly sunny, with a high near 64.
Mostly cloudy, with a low around 43.
Partly sunny, with a high near 67.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tonight
Oct 13
|
Showers And Thunderstorms Likely
|
55°F |
1 mph
N
|
|
Wednesday
Oct 14
|
Chance Rain Showers then Mostly Cloudy
|
69°F |
0 to 6 mph
NNE
|
|
Wednesday Night
Oct 14
|
Mostly Cloudy
|
47°F |
6 mph
NE
|
|
Thursday
Oct 15
|
Showers And Thunderstorms
|
64°F |
7 mph
E
|
|
Thursday Night
Oct 15
|
Rain Showers
|
45°F |
3 to 14 mph
WSW
|
|
Friday
Oct 16
|
Rain Showers Likely
|
56°F |
18 mph
NW
|
|
Friday Night
Oct 16
|
Chance Rain Showers then Partly Cloudy
|
33°F |
2 to 18 mph
NNW
|
|
Saturday
Oct 17
|
Sunny
|
55°F |
0 to 8 mph
W
|
|
Saturday Night
Oct 17
|
Mostly Clear
|
36°F |
7 mph
SW
|
|
Sunday
Oct 18
|
Sunny
|
63°F |
6 to 10 mph
SSW
|
|
Sunday Night
Oct 18
|
Partly Cloudy
|
44°F |
6 to 9 mph
SSW
|
|
Monday
Oct 19
|
Partly Sunny
|
64°F |
7 mph
SW
|
|
Monday Night
Oct 19
|
Mostly Cloudy
|
43°F |
0 to 5 mph
WNW
|
|
Tuesday
Oct 20
|
Partly Sunny
|
67°F |
0 to 5 mph
SSE
|
Major City Forecasts
Live forecast snapshots for major cities across Allegan County.
Coverage
Forecast coverage currently spans 8 of 8 mapped cities in Allegan County.
Largest mapped city population in this region: 26,033.
