Live Weather & Forecast

Weather in Winthrop Harbor

Illinois, United States · Real-time conditions & 3-day outlook

Flag of United States
Overcast
21°C
Feels like 21°C
70°F / Feels 70°F
Overcast
Winthrop Harbor, Illinois
🌞 Daytime
Updated: 2026-04-13 10:15
💧
Humidity
81%
💨
Wind
21.6 km/h SW
🌬️
Wind Gust
37.5 km/h
🌡️
Pressure
1012 mb
👁️
Visibility
16 km
☀️
UV Index
2.3 (Low)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
100%
💦
Dew Point
17.9°C
🌐
Wind Degree
235°

Air Quality Index

US EPA: Good UK DEFRA: Low (2)
CO
156.9 μg/m³
NO₂
11.6 μg/m³
O₃
81 μg/m³
SO₂
2.4 μg/m³
PM 2.5
13.5 μg/m³
PM 10
14.2 μg/m³

Weather Alerts 1

Met · Severe · Immediate
Flood Warning issued April 12 at 9:04PM CDT until April 14 at 7:00PM CDT by NWS Chicago IL

...The Flood Warning continues for the following rivers in Indiana... Illinois... Kankakee River at Shelby affecting Lake IN and Newton Counties. Fox River at Algonquin Lock & Dam tailwater affecting Kane, McHenry and Lake IL Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Fox River from Johnsburg downstream to Red Gate Road in St. Charles, including th...

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation...

Effective: 2026-04-12T21:04:00-05:00  ·  Expires: 2026-04-13T15:15:00-05:00

Today's Hourly Forecast

24-hour breakdown for Winthrop Harbor, Illinois

12 AM
Light rain
17°
Light rain
💧 90% 💨 31.3 km/h 🌧️ 100%
1 AM
Light drizzle
16°
Light drizzle
💧 90% 💨 27 km/h 🌧️ 100%
2 AM
Patchy rain nearby
16°
Patchy rain nearby
💧 89% 💨 26.6 km/h 🌧️ 100%
3 AM
Partly Cloudy
16°
Partly Cloudy
💧 91% 💨 25.6 km/h
4 AM
Cloudy
17°
Cloudy
💧 92% 💨 27.4 km/h
5 AM
Partly Cloudy
17°
Partly Cloudy
💧 92% 💨 25.6 km/h
6 AM
Partly Cloudy
17°
Partly Cloudy
💧 91% 💨 20.9 km/h
7 AM
Overcast
17°
Overcast
💧 91% 💨 19.8 km/h
8 AM
Overcast
18°
Overcast
💧 91% 💨 19.8 km/h
9 AM
Cloudy
19°
Cloudy
💧 90% 💨 20.9 km/h
10 AM
Overcast
21°
Overcast
💧 81% 💨 21.6 km/h
11 AM
Partly Cloudy
21°
Partly Cloudy
💧 86% 💨 21.6 km/h
12 PM
Cloudy
22°
Cloudy
💧 82% 💨 22 km/h
1 PM
Partly Cloudy
22°
Partly Cloudy
💧 78% 💨 20.2 km/h
2 PM
Cloudy
23°
Cloudy
💧 76% 💨 19.4 km/h
3 PM
Sunny
23°
Sunny
💧 74% 💨 21.6 km/h
4 PM
Patchy light drizzle
24°
Patchy light drizzle
💧 69% 💨 20.5 km/h 🌧️ 100%
5 PM
Sunny
24°
Sunny
💧 60% 💨 23 km/h
6 PM
Patchy rain nearby
22°
Patchy rain nearby
💧 60% 💨 24.5 km/h 🌧️ 73%
7 PM
Sunny
18°
Sunny
💧 87% 💨 24.5 km/h
8 PM
Fog
17°
Fog
💧 100% 💨 23 km/h
9 PM
Partly Cloudy
17°
Partly Cloudy
💧 82% 💨 27.7 km/h
10 PM
Clear
18°
Clear
💧 82% 💨 28.4 km/h
11 PM
Patchy rain nearby
18°
Patchy rain nearby
💧 89% 💨 31.3 km/h 🌧️ 78%

3-Day Forecast

Daily overview for Winthrop Harbor, Illinois

Today
Patchy rain nearby
Patchy rain nearby
26° / 14°
🌧️ 78% chance of rain
💧 Avg. humidity: 84%
💨 Max wind: 31.3 km/h
🌧️ Total precip: 1.66 mm
☀️ UV Index: 1.1
🌅 Sunrise: 06:13 AM
🌇 Sunset: 07:31 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Moderate rain
Moderate rain
22° / 17°
🌧️ 84% chance of rain
💧 Avg. humidity: 91%
💨 Max wind: 32.4 km/h
🌧️ Total precip: 9.24 mm
☀️ UV Index: 1.1
🌅 Sunrise: 06:12 AM
🌇 Sunset: 07:33 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Heavy rain
Heavy rain
12° / 5°
🌧️ 88% chance of rain
💧 Avg. humidity: 98%
💨 Max wind: 24.1 km/h
🌧️ Total precip: 220.57 mm
☀️ UV Index: 0.5
🌅 Sunrise: 06:10 AM
🌇 Sunset: 07:34 PM
🌙 Waning Crescent
🌑 Moon: 8% lit

Best Time to Visit Winthrop Harbor

Plan your trip to Winthrop Harbor, United States around the most favorable weather conditions.

Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
← Back to Winthrop Harbor 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Winthrop Harbor?
Current conditions in Winthrop Harbor: Overcast, temperature 21°C, humidity 81%.
What is the best time to visit Winthrop Harbor?
The best time to visit Winthrop Harbor is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Winthrop Harbor?
Winthrop Harbor is located at approximately 42.5° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Winthrop Harbor?
The wettest period in Winthrop Harbor is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Winthrop Harbor?
For visits to Winthrop Harbor during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Winthrop Harbor in?
Winthrop Harbor is located in United States, in the state of Illinois.
What are the public holidays in Winthrop Harbor in 2026?
View the 2026 public holidays for Winthrop Harbor on our Holidays page.
What are the GPS coordinates used for the weather forecast in Winthrop Harbor?
The weather forecast for Winthrop Harbor uses coordinates 42.4789, -87.8238.