Ionia County, MI Weather Forecast
County weather hub
Sunny
Compare major city weather across Ionia County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny. High near 99, with temperatures falling to around 97 in the afternoon. Heat index values as high as 101. West wind 8 to 13 mph.
County Weather Overview
This county weather page brings together forecast coverage for Ionia County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 5 of 5 mapped cities in Ionia County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jul 14 to Jul 20, 2026
- Latest sync
- Jul 14, 2026 11:45 AM EDT
- Forecast office
- GRR
- Source
- NOAA / NWS
Daily Outlook
This Week in Ionia County
Today looks like the warmest upcoming period in Ionia County at 99 degrees F.
Monday Night is the coolest period ahead with temperatures near 61 degrees F.
The strongest winds are forecast for Saturday at about 7 to 14 mph SW.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 14, 2026 11:45 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 72. Heat index values as high as 98. West wind 8 to 12 mph, with gusts as high as 20 mph.
Mostly sunny, with a high near 98. Heat index values as high as 103. West northwest wind 5 to 12 mph, with gusts as high as 21 mph.
Partly cloudy, with a low around 67. North wind 3 to 12 mph, with gusts as high as 22 mph.
Sunny, with a high near 94. Northeast wind 3 to 7 mph.
Mostly clear, with a low around 67.
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90.
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 65.
A chance of rain showers before 2pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 85.
A slight chance of showers and thunderstorms. Mostly clear, with a low around 62.
A slight chance of showers and thunderstorms. Sunny, with a high near 84.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 61.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Jul 14
|
Sunny
|
99°F |
8 to 13 mph
W
|
|
Tonight
Jul 14
|
Mostly Clear
|
72°F |
8 to 12 mph
W
|
|
Wednesday
Jul 15
|
Mostly Sunny
|
98°F |
5 to 12 mph
WNW
|
|
Wednesday Night
Jul 15
|
Partly Cloudy
|
67°F |
3 to 12 mph
N
|
|
Thursday
Jul 16
|
Sunny
|
94°F |
3 to 7 mph
NE
|
|
Thursday Night
Jul 16
|
Mostly Clear
|
67°F |
7 mph
NNE
|
|
Friday
Jul 17
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
90°F |
8 mph
E
|
|
Friday Night
Jul 17
|
Chance Showers And Thunderstorms
|
68°F |
8 mph
SE
|
|
Saturday
Jul 18
|
Chance Showers And Thunderstorms
|
88°F |
7 to 14 mph
SW
|
|
Saturday Night
Jul 18
|
Chance Showers And Thunderstorms
|
65°F |
9 to 14 mph
NW
|
|
Sunday
Jul 19
|
Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
85°F |
13 mph
N
|
|
Sunday Night
Jul 19
|
Slight Chance Showers And Thunderstorms
|
62°F |
7 to 13 mph
SW
|
|
Monday
Jul 20
|
Slight Chance Showers And Thunderstorms
|
84°F |
8 to 13 mph
W
|
|
Monday Night
Jul 20
|
Slight Chance Showers And Thunderstorms
|
61°F |
7 to 13 mph
W
|
Major City Forecasts
Live forecast snapshots for major cities across Ionia County.
Coverage
Forecast coverage currently spans 5 of 5 mapped cities in Ionia County.
Largest mapped city population in this region: 5,738.
