Grundy County, IA Weather Forecast
County weather hub
Slight Chance Showers And Thunderstorms
Compare major city weather across Grundy County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A slight chance of rain showers between 7am and 10am, then a slight chance of showers and thunderstorms between 10am and 1pm, then showers and thunderstorms. Partly sunny. High near 77, with temperatures falling to around 67 in the afternoon. South southwest wind 14 to 24 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
County Weather Overview
This county weather page brings together forecast coverage for Grundy County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 4 of 4 mapped cities in Grundy County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Apr 17 to Apr 22, 2026
- Latest sync
- Apr 16, 2026 9:08 AM CDT
- Forecast office
- DMX
- Source
- NOAA / NWS
Daily Outlook
This Week in Grundy County
Friday looks like the warmest upcoming period in Grundy County at 77 degrees F.
Saturday Night is the coolest period ahead with temperatures near 31 degrees F.
The strongest winds are forecast for Friday at about 14 to 24 mph SSW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 16, 2026 9:08 AM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- DMX
- Radar station
- KDMX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms. Mostly cloudy. Low around 33, with temperatures rising to around 35 overnight. Northwest wind around 20 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
A slight chance of rain showers before 7am. Sunny, with a high near 49. Northwest wind 18 to 22 mph, with gusts as high as 29 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Mostly clear, with a low around 31.
Sunny, with a high near 56.
Mostly clear, with a low around 33.
Sunny, with a high near 66.
Mostly clear, with a low around 48.
Sunny, with a high near 72.
Mostly clear, with a low around 48.
Sunny, with a high near 71.
A chance of rain showers after 7pm. Partly cloudy, with a low around 50.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Apr 17
|
Slight Chance Showers And Thunderstorms
|
77°F |
14 to 24 mph
SSW
|
|
Friday Night
Apr 17
|
Showers And Thunderstorms
|
33°F |
20 mph
NW
|
|
Saturday
Apr 18
|
Slight Chance Rain Showers then Sunny
|
49°F |
18 to 22 mph
NW
|
|
Saturday Night
Apr 18
|
Mostly Clear
|
31°F |
7 to 18 mph
WNW
|
|
Sunday
Apr 19
|
Sunny
|
56°F |
7 to 14 mph
NW
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
33°F |
9 mph
ENE
|
|
Monday
Apr 20
|
Sunny
|
66°F |
8 to 18 mph
SSE
|
|
Monday Night
Apr 20
|
Mostly Clear
|
48°F |
16 mph
SSW
|
|
Tuesday
Apr 21
|
Sunny
|
72°F |
16 mph
SW
|
|
Tuesday Night
Apr 21
|
Mostly Clear
|
48°F |
10 to 14 mph
SSW
|
|
Wednesday
Apr 22
|
Sunny
|
71°F |
9 to 15 mph
S
|
|
Wednesday Night
Apr 22
|
Chance Rain Showers
|
50°F |
14 mph
SE
|
Major City Forecasts
Live forecast snapshots for major cities across Grundy County.
Coverage
Forecast coverage currently spans 4 of 4 mapped cities in Grundy County.
Largest mapped city population in this region: 2,670.
