Cottage Grove, IL Weather Forecast
Local 7-day forecast
Patchy Frost then Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Cottage Grove, IL in one place.
Patchy frost and patchy fog before 9am. Sunny. High near 66, with temperatures falling to around 61 in the afternoon. Southwest wind around 2 mph.
Local Weather Overview
This forecast page for Cottage Grove, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Nov 8, 2026 7:48 AM CST.
The active forecast window currently covers Nov 9 to Nov 14, 2026 for Cottage Grove, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Nov 9 to Nov 14, 2026
- Latest sync
- Nov 8, 2026 7:48 AM CST
- Forecast office
- PAH
- Source
- NOAA / NWS
Daily Outlook
This Week in Cottage Grove
Tuesday looks like the warmest upcoming period in Cottage Grove at 70 degrees F.
Friday Night is the coolest period ahead with temperatures near 30 degrees F.
The strongest winds are forecast for Thursday at about 9 to 16 mph N.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Nov 8, 2026 7:48 AM CST
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- PAH
- Radar station
- KPAH
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Clear, with a low around 40. Southwest wind around 2 mph.
Sunny, with a high near 70. Southwest wind 2 to 6 mph.
Mostly clear, with a low around 43. West southwest wind around 2 mph.
A chance of rain showers after noon. Mostly sunny, with a high near 69. West wind 0 to 8 mph.
A chance of rain showers before midnight. Mostly cloudy, with a low around 40. North northwest wind 5 to 9 mph.
Mostly sunny, with a high near 55. North wind 9 to 16 mph, with gusts as high as 21 mph.
Partly cloudy, with a low around 32. North northwest wind 5 to 13 mph.
Sunny, with a high near 51. North northwest wind 5 to 9 mph.
Mostly clear, with a low around 30. North northwest wind 0 to 3 mph.
Sunny, with a high near 56. Northwest wind 0 to 6 mph.
Mostly clear, with a low around 34. West southwest wind around 2 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Monday
Nov 9
|
Patchy Frost then Sunny
|
66°F |
2 mph
SW
|
|
Monday Night
Nov 9
|
Clear
|
40°F |
2 mph
SW
|
|
Tuesday
Nov 10
|
Sunny
|
70°F |
2 to 6 mph
SW
|
|
Tuesday Night
Nov 10
|
Mostly Clear
|
43°F |
2 mph
WSW
|
|
Veterans Day
Nov 11
|
Mostly Sunny then Chance Rain Showers
|
69°F |
0 to 8 mph
W
|
|
Wednesday Night
Nov 11
|
Chance Rain Showers then Mostly Cloudy
|
40°F |
5 to 9 mph
NNW
|
|
Thursday
Nov 12
|
Mostly Sunny
|
55°F |
9 to 16 mph
N
|
|
Thursday Night
Nov 12
|
Partly Cloudy
|
32°F |
5 to 13 mph
NNW
|
|
Friday
Nov 13
|
Sunny
|
51°F |
5 to 9 mph
NNW
|
|
Friday Night
Nov 13
|
Mostly Clear
|
30°F |
0 to 3 mph
NNW
|
|
Saturday
Nov 14
|
Sunny
|
56°F |
0 to 6 mph
NW
|
|
Saturday Night
Nov 14
|
Mostly Clear
|
34°F |
2 mph
WSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Cottage Grove.