Cottage Grove, IN Weather Forecast
Local 7-day forecast
Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Cottage Grove, IN in one place.
A slight chance of showers and thunderstorms between 7am and 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 88. West wind 2 to 7 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Cottage Grove, IN 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: Sep 15, 2026 6:37 PM EDT.
The active forecast window currently covers Sep 17 to Sep 21, 2026 for Cottage Grove, IN.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 17 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 6:37 PM EDT
- Forecast office
- ILN
- Source
- NOAA / NWS
Daily Outlook
This Week in Cottage Grove
Thursday looks like the warmest upcoming period in Cottage Grove at 88 degrees F.
Monday Night is the coolest period ahead with temperatures near 61 degrees F.
The strongest winds are forecast for Monday Night at about 5 to 9 mph NE.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 6:37 PM EDT
- Coverage
- 5 days
- Time zone
- America/Indiana/Indianapolis
- Forecast office
- ILN
- Radar station
- KILN
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms. Partly cloudy, with a low around 68. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
A slight chance of rain showers before 8am. Partly sunny, with a high near 82.
Partly cloudy, with a low around 62.
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Partly sunny, with a high near 80. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 61.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Sep 17
|
Slight Chance Showers And Thunderstorms
|
88°F |
2 to 7 mph
W
|
|
Thursday Night
Sep 17
|
Chance Showers And Thunderstorms
|
68°F |
5 mph
N
|
|
Friday
Sep 18
|
Slight Chance Rain Showers then Partly Sunny
|
82°F |
7 mph
NE
|
|
Friday Night
Sep 18
|
Partly Cloudy
|
62°F |
7 mph
E
|
|
Saturday
Sep 19
|
Mostly Sunny then Chance Showers And Thunderstorms
|
87°F |
7 mph
S
|
|
Saturday Night
Sep 19
|
Chance Showers And Thunderstorms
|
68°F |
5 mph
S
|
|
Sunday
Sep 20
|
Chance Rain Showers
|
86°F |
5 to 8 mph
SW
|
|
Sunday Night
Sep 20
|
Chance Showers And Thunderstorms
|
64°F |
8 mph
NE
|
|
Monday
Sep 21
|
Chance Showers And Thunderstorms
|
80°F |
5 to 8 mph
SW
|
|
Monday Night
Sep 21
|
Chance Showers And Thunderstorms
|
61°F |
5 to 9 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Cottage Grove.