Winthrop Harbor, IL Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for Winthrop Harbor, IL.

1 Currently Active Alert for Winthrop Harbor

Current Conditions — Winthrop Harbor, IL

MILWAUKEE (KMKE)

Clear

53.6 F
Humidity:54%
Wind Speed: 15.0 G 21.9 mph
Barometer:29.99 in
Dewpoint:37.4 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
Apr 22 2026, 01:35 PM CDT
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5-Day Forecast — Winthrop Harbor, IL

Wednesday

High 55 °F
Partly Sunny
Wednesday
Night
Low 46 °F
Mostly Cloudy
Thursday

High 77 °F
Mostly Cloudy
Thursday
Night
Low 57 °F
Chance of T-storms
Friday

High 73 °F
T-storms Likely
Friday
Night
Low 48 °F
Partly Cloudy
Saturday

High 59 °F
Partly Sunny
Saturday
Night
Low 44 °F
Mostly Cloudy
Sunday

High 59 °F
Partly Sunny

Detailed Forecast — Winthrop Harbor, IL

Wednesday
Partly Sunny. High near 55°F. Wind 7 to 9 mph, with gusts as high as 13 mph.
Wednesday Night
Mostly Cloudy. Low around 46°F. Wind 5 to 6 mph, with gusts as high as 10 mph.
Thursday
Mostly Cloudy. High near 77°F. Wind 7 to 14 mph, with gusts as high as 25 mph.
Thursday Night
Chance of Thunderstorms. Low around 57°F. Wind 10 to 12 mph, with gusts as high as 20 mph.
Friday
Thunderstorms Likely. High near 73°F. Wind 8 to 12 mph, with gusts as high as 18 mph.
Friday Night
Partly Cloudy. Low around 48°F. Wind around 7 mph, with gusts as high as 13 mph.
Saturday
Partly Sunny. High near 59°F. Wind 3 to 10 mph, with gusts as high as 16 mph.
Saturday Night
Mostly Cloudy. Low around 44°F. Wind around 3 mph, with gusts as high as 7 mph.
Sunday
Partly Sunny. High near 59°F. Wind 7 to 8 mph, with gusts as high as 15 mph.
Sunday Night
Chance of Rain. Low around 48°F. Wind around 10 mph, with gusts as high as 21 mph.
Monday
Thunderstorms Likely. High near 64°F. Wind 13 to 15 mph, with gusts as high as 29 mph.
Monday Night
Rain Likely. Low around 48°F. Wind around 9 mph, with gusts as high as 18 mph.
Tuesday
Mostly Cloudy. High near 60°F. Wind 7 to 13 mph, with gusts as high as 22 mph.
IL Radar
Current Radar • IL
Day 1 Outlook • April 22, 2026

Observation History — Winthrop Harbor, IL

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)
01:35 PM CDT 15.0 G 21.9 10.00 Clear -- 53.6 37.4 54% NA NA 29.99 1015.6
01:15 PM CDT 15.0 10.00 Clear -- 53.6 39.2 58% NA NA 29.99 1015.6
01:05 PM CDT NE 13.8 10.00 Clear -- 53.6 39.2 58% NA NA 29.99 1015.6
12:52 PM CDT 15.0 10.00 Mostly Clear -- 54.0 41.0 61% NA NA 29.99 1015.6
12:35 PM CDT 13.8 G 19.6 10.00 Clear -- 55.4 42.8 62% NA NA 29.99 1015.6
12:25 PM CDT 12.7 10.00 Clear -- 53.6 42.8 67% NA NA 29.99 1015.6
12:10 PM CDT 15.0 10.00 Clear -- 53.6 41.0 62% NA NA 29.99 1015.6
12:00 PM CDT 12.7 10.00 Clear -- 51.8 41.0 67% NA NA 29.99 1015.6
11:45 AM CDT 13.8 10.00 Clear -- 53.6 41.0 62% NA NA 29.98 1015.2
11:30 AM CDT 12.7 10.00 Clear -- 53.6 42.8 67% NA NA 29.99 1015.6
11:10 AM CDT NE 11.5 10.00 Clear -- 53.6 42.8 67% NA NA 29.99 1015.6
11:05 AM CDT 10.4 10.00 Clear -- 53.6 41.0 62% NA NA 29.99 1015.6
10:50 AM CDT 11.5 10.00 Mostly Clear -- 53.6 42.8 67% NA NA 29.99 1015.6
10:35 AM CDT 9.2 10.00 Clear -- 53.6 42.8 67% NA NA 29.98 1015.2
10:20 AM CDT 10.4 G 16.1 10.00 Clear -- 51.8 41.0 67% NA NA 29.98 1015.2
10:10 AM CDT 10.4 10.00 Clear -- 51.8 41.0 67% NA NA 29.97 1014.9
10:00 AM CDT 13.8 10.00 Clear -- 51.8 41.0 67% NA NA 29.97 1014.9
09:50 AM CDT 12.7 10.00 Clear -- 51.8 42.8 71% NA NA 29.96 1014.6
09:45 AM CDT 15.0 10.00 Clear -- 51.8 41.0 67% NA NA 29.96 1014.6
09:30 AM CDT 15.0 10.00 Clear -- 50.0 39.2 66% NA NA 29.96 1014.6
09:15 AM CDT 12.7 G 19.6 10.00 Clear -- 50.0 39.2 66% NA NA 29.97 1014.9
09:05 AM CDT 17.3 10.00 Clear -- 50.0 39.2 66% NA NA 29.96 1014.6
09:00 AM CDT 15.0 G 20.7 10.00 Clear -- 50.0 39.2 66% NA NA 29.96 1014.6
08:40 AM CDT 12.7 G 18.4 10.00 Clear -- 50.0 41.0 71% NA NA 29.97 1014.9

Regional Weather Observation

MILWAUKEE (KMKE)

Clear
53.6 F

KENOSHA (KENW)

Clear
66.2 F

RACINE (KRAC)

Clear
53.6 F

BURLINGTON (KBUU)

Clear
67.6 F

EAST TROY (K57C)

Clear
67.6 F

WAUKEGAN (KUGN)

Clear
60.8 F
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