Cottage Grove, WI Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for Cottage Grove, WI.

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Current Conditions — Cottage Grove, WI

MADISON (KMSN)

Mostly Clear

73.0 F
Humidity:44%
Wind Speed:E 8.1 mph
Barometer:29.94 in
Dewpoint:50.0 F
Visibility:10.00 mi
Precip:--
Heat Index:72.1 F
Wind Chill:NA
Apr 22 2026, 02:53 PM CDT
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5-Day Forecast — Cottage Grove, WI

Wednesday

High 75 °F
Mostly Sunny
Wednesday
Night
Low 55 °F
Partly Cloudy
Thursday

High 80 °F
Partly Sunny
Thursday
Night
Low 62 °F
T-storms Likely
Friday

High 73 °F
T-storms Likely
Friday
Night
Low 46 °F
Mostly Clear
Saturday

High 66 °F
Partly Sunny
Saturday
Night
Low 44 °F
Mostly Cloudy
Sunday

High 68 °F
Mostly Cloudy

Detailed Forecast — Cottage Grove, WI

Wednesday
Mostly Sunny. High near 75°F. Wind 6 to 8 mph, with gusts as high as 14 mph.
Wednesday Night
Partly Cloudy. Low around 55°F. Wind around 6 mph, with gusts as high as 14 mph.
Thursday
Partly Sunny. High near 80°F. Wind 8 to 16 mph, with gusts as high as 25 mph.
Thursday Night
Thunderstorms Likely. Low around 62°F. Wind 10 to 12 mph, with gusts as high as 23 mph.
Friday
Thunderstorms Likely. High near 73°F. Wind 9 to 10 mph, with gusts as high as 18 mph.
Friday Night
Mostly Clear. Low around 46°F. Wind around 6 mph, with gusts as high as 15 mph.
Saturday
Partly Sunny. High near 66°F. Wind 3 to 10 mph, with gusts as high as 17 mph.
Saturday Night
Mostly Cloudy. Low around 44°F. Wind around 2 mph, with gusts as high as 8 mph.
Sunday
Mostly Cloudy. High near 68°F. Wind 10 to 13 mph, with gusts as high as 22 mph.
Sunday Night
Chance of Rain. Low around 50°F. Wind around 13 mph, with gusts as high as 24 mph.
Monday
Thunderstorms Likely. High near 68°F. Wind 15 to 17 mph, with gusts as high as 29 mph.
Monday Night
Chance of Rain. Low around 46°F. Wind around 13 mph, with gusts as high as 24 mph.
Tuesday
Slight Chance of Rain Showers. High near 62°F. Wind 9 to 16 mph, with gusts as high as 25 mph.
WI Radar
Current Radar • WI
Day 1 Outlook • April 22, 2026

Observation History — Cottage Grove, WI

Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
02:53 PM CDT E 8.1 10.00 Mostly Clear -- 73.0 50.0 44% NA 72.1 29.94 1013.9
02:50 PM CDT E 10.4 10.00 NULL -- 73.4 50.0 44% NA 72.5 29.94 1013.9
02:30 PM CDT E 6.9 10.00 Clear -- 73.4 50.0 44% NA 72.5 29.94 1013.9
02:15 PM CDT 11.5 10.00 Clear -- 71.6 50.0 46% NA 70.7 29.94 1013.9
02:10 PM CDT E 9.2 10.00 Clear -- 71.6 50.0 46% NA 70.7 29.95 1014.2
02:00 PM CDT 5.7 10.00 Clear -- 71.6 50.0 46% NA 70.7 29.95 1014.2
01:25 PM CDT E 5.7 10.00 Clear -- 69.8 50.0 49% NA NA 29.97 1014.9
01:15 PM CDT 3.4 10.00 Clear -- 69.8 48.2 46% NA NA 29.97 1014.9
01:10 PM CDT 4.6 G 21.9 10.00 Clear -- 69.8 48.2 46% NA NA 29.97 1014.9
12:53 PM CDT 5.8 10.00 Clear -- 68.0 48.9 50% NA NA 29.97 1014.9
12:35 PM CDT E 4.6 10.00 Clear -- 68.0 50.0 53% NA NA 29.98 1015.2
12:25 PM CDT E 4.6 10.00 Clear -- 66.2 48.2 52% NA NA 29.98 1015.2
12:15 PM CDT E 5.7 10.00 Clear -- 66.2 48.2 52% NA NA 29.98 1015.2
12:05 PM CDT E 4.6 10.00 Clear -- 66.2 48.2 52% NA NA 29.98 1015.2
12:00 PM CDT E 8.1 10.00 Clear -- 66.2 48.2 52% NA NA 29.98 1015.2
11:40 AM CDT E 6.9 G 21.9 10.00 Clear -- 64.4 48.2 56% NA NA 29.98 1015.2
11:25 AM CDT NE 3.4 10.00 Clear -- 62.6 46.4 55% NA NA 29.98 1015.2
11:10 AM CDT E 9.2 10.00 Clear -- 62.6 46.4 55% NA NA 29.98 1015.2
11:05 AM CDT NE 9.2 10.00 Clear -- 62.6 46.4 55% NA NA 29.98 1015.2
11:00 AM CDT NE 9.2 10.00 Clear -- 62.6 46.4 55% NA NA 29.98 1015.2
10:35 AM CDT NE 8.1 10.00 Clear -- 62.6 46.4 55% NA NA 29.98 1015.2
10:20 AM CDT 0.0 10.00 Clear -- 62.6 46.4 55% NA NA 29.98 1015.2
10:10 AM CDT 3.4 10.00 Clear -- 60.8 44.6 55% NA NA 29.98 1015.2
10:00 AM CDT E 4.6 10.00 Clear -- 59.0 44.6 59% NA NA 29.98 1015.2

Regional Weather Observation

MADISON (KMSN)

Mostly Clear
73.0 F

DELLS/BARABOO (KDLL)

NULL
73.0 F

JUNEAU (KUNU)

Clear
69.3 F

LONE ROCK (KLNR)

Clear
77.0 F

MONROE (KEFT)

Clear
75.6 F

JANESVILLE/ROCK (KJVL)

Clear
73.4 F
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