Grundy County, IA Weather Forecast
County weather hub
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.
Rain showers before 10am, then showers and thunderstorms. Cloudy, with a high near 58. Northeast wind 6 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters 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
- Oct 15 to Oct 20, 2026
- Latest sync
- Oct 14, 2026 4:40 AM CDT
- Forecast office
- DMX
- Source
- NOAA / NWS
Daily Outlook
This Week in Grundy County
Tuesday looks like the warmest upcoming period in Grundy County at 70 degrees F.
Friday Night is the coolest period ahead with temperatures near 34 degrees F.
The strongest winds are forecast for Friday at about 17 to 25 mph NNW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 14, 2026 4:40 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
Rain showers likely before 1am. Mostly cloudy, with a low around 43. Northwest wind 12 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Mostly sunny, with a high near 55.
Widespread frost after 3am. Clear, with a low around 34.
Widespread frost before 9am. Sunny, with a high near 59.
Clear, with a low around 41.
Sunny, with a high near 64.
Partly cloudy, with a low around 47.
Partly sunny, with a high near 66.
Partly cloudy, with a low around 47.
Sunny, with a high near 70.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 15
|
Showers And Thunderstorms
|
58°F |
6 to 10 mph
NE
|
|
Thursday Night
Oct 15
|
Rain Showers Likely
|
43°F |
12 to 18 mph
NW
|
|
Friday
Oct 16
|
Mostly Sunny
|
55°F |
17 to 25 mph
NNW
|
|
Friday Night
Oct 16
|
Clear then Widespread Frost
|
34°F |
0 to 13 mph
WNW
|
|
Saturday
Oct 17
|
Widespread Frost then Sunny
|
59°F |
0 to 15 mph
SSW
|
|
Saturday Night
Oct 17
|
Clear
|
41°F |
13 mph
SSW
|
|
Sunday
Oct 18
|
Sunny
|
64°F |
14 to 18 mph
SSW
|
|
Sunday Night
Oct 18
|
Partly Cloudy
|
47°F |
5 to 14 mph
SSW
|
|
Monday
Oct 19
|
Partly Sunny
|
66°F |
6 mph
SSW
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
47°F |
3 mph
SSE
|
|
Tuesday
Oct 20
|
Sunny
|
70°F |
1 to 9 mph
SSE
|
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.
