Grundy County, IL Weather Forecast
County weather hub
Chance Rain Showers
Compare major city weather across Grundy County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A chance of rain showers. Mostly cloudy, with a high near 72.
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 3 of 3 mapped cities in Grundy County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Oct 15 to Oct 17, 2026
- Latest sync
- Oct 11, 2026 12:07 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Grundy County
Thursday looks like the warmest upcoming period in Grundy County at 72 degrees F.
Friday Night is the coolest period ahead with temperatures near 42 degrees F.
The strongest winds are forecast for Friday at about 10 to 15 mph WNW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 11, 2026 12:07 AM CDT
- Coverage
- 3 days
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KLOT
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. Mostly cloudy, with a low around 52.
A chance of rain showers before 1pm. Partly sunny, with a high near 66.
Partly cloudy, with a low around 42.
Mostly sunny, with a high near 60.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 15
|
Chance Rain Showers
|
72°F |
10 mph
E
|
|
Thursday Night
Oct 15
|
Chance Rain Showers
|
52°F |
5 to 10 mph
S
|
|
Friday
Oct 16
|
Chance Rain Showers
|
66°F |
10 to 15 mph
WNW
|
|
Friday Night
Oct 16
|
Partly Cloudy
|
42°F |
10 to 15 mph
NW
|
|
Saturday
Oct 17
|
Mostly Sunny
|
60°F |
10 mph
NNW
|
Major City Forecasts
Live forecast snapshots for major cities across Grundy County.
Coverage
Forecast coverage currently spans 3 of 3 mapped cities in Grundy County.
Largest mapped city population in this region: 15,162.
