Our Proprietary 10-Day Forecast

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Current warnings over Winthrop Harbor, Illinois
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<p>Warnings from F5Weather</a></div>

United States weather warnings are issued by various organizations under NOAA. Most from the National Weather Service, but also Storm Prediction Center and National Hurricane Center.

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Current radar over Winthrop Harbor, Illinois red dot
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<p>Live radar from F5Weather</a></div>

Our radar is based off of US NEXRAD and Canadian weather radar sites through the quality controlled MRMS system. It compiles various sources for radar data and filters out erroneous returns such as sun spikes and ground clutter. We then colorize the precipitation based on our methods for determining precipitation type. Rain is in shades of green, mixed precipitation and freezing rain in shades of pink and snow is in shades of blue.

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Current satellite over Winthrop Harbor, Illinois red dot
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<p>Live satellite from F5Weather</a></div>

Our satellite is from the GOES-16. It is color enhanced by using a geocolor terrain background during the day and black marble city lights at night. The daytime satellite data is Visible satellite imagery, and nighttime uses Infrared bands. The bluish clouds are fog and low cloud. The whiteest clouds are the coldest, highest cloud tops.

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Current surface weather map around Lake County, IL

This surface map is from the HRRR computer model. It is a 1-hour forecast, updated hourly, which is a good estimate of the current surface conditions. This map shows the current high and low pressure centers, pressure isobar contours, wind streamlines and thickness contours. It also shows the currently depicted preciptiation estimates, although this should not be a substitute for actual live radar. The purple dashed contour is the 5400m thickness line, which is often a good proxy for the rain/snow line.

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Temperatures right now near Winthrop Harbor, Illinois

This is the latest surface temperatures as depicted by the HRRR computer model, updated hourly. Although these are not actual observations, this model is a very good representation of current conditions as it factors in observations, terrain and physics to give you more detailed temperatures in areas that do not have reporting weather stations. For the latest reports at specific locations, like in Winthrop Harbor, IL please see our current conditions data on the left and right side of this page, or go to our current conditions page.

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Surface wind speed map over Winthrop Harbor, IL

This map shows the latest HRRR computer model winds. This depiction of the current wind directions and speeds is an estimate from the computer model. For actual observations in Winthrop Harbor, IL, see the current conditions data on the left and right side of this page, or go to our current conditions page.

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Regional 24 hour rainfall expected near Winthrop Harbor, Illinois

This is a forecast of the amount of precipitation expected over the next 24 hours from the HRRR weather forecast model. This is only one forecast depiction, and you should check other models to get a better idea of what may happen. You can view this and other models in more detail on our main weather forecast maps page. There, you will also be able to look at forecasts beyond just 24 hours and look at forecasts out to as far as 16 days.

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Area snowfall accumulation expected around Lake County, Illinois

This is snowfall forecast, with amounts anticipated in the next 24 hours. This guidance is from the HRRR weather model. For more model forecasts out to 16 days, visit our main weather forecast maps page.

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These are Convective Outlooks from the Storm Prediction Center. Click to see Days 1-3 broken down into Tornado, Wind and Hail threats, as well as days 5-8 outlooks.

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Atlantic Hurricane and Tropical Storm Tracking Map
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<p>Hurricane Tracking from F5Weather</a></div>

Our hurricane tracking map monitors for any current or forecast tropical disturbances in the Atlantic. (See our Pacific Hurricane Tracker) Various hurricane models will draw a 'spaghetti plot' in the Atlantic Basin when a disturbance is forecast or exists, showing the system's forecast track. Once a storm has developed, the National Hurricane Center will forecast their official track. This will show up on the map along with the storm's current intensity, track and name. We will also plot some of the storm's vitals and of course the spaghetti plots from the models along with the NHC forecast track will give you an idea of where it's heading, and its forecast intensity with time.

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To view the latest computer models, visit f5wx.com for access to the weather maps and guidance that meteorologists use to make their forecasts.
 
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View Skew-T soundings, textual data tables for your location, and of course maps! Weather forecast maps of the basics like temperature, wind, pressure, humidity, dew point, cloud cover, simulated radar, travel weather, rainfall and snow are available. More advanced users can also get use out of our severe weather & tornado threat maps, as well as upper air & shear graphics.
 
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Climate Summary
(made with AI, use with caution)
Winthrop Harbor, Illinois Climate Summary

General Climate

    •   Köppen Climate Classification

Dfa (Hot Summer Continental Climate)

    •   Average Annual Temperature

49.3°F (9.6°C)

    •   Average Annual Precipitation

34.6 inches (879 mm)

    •   Average Annual Snowfall

29.6 inches (75 cm)

Temperature

    •   Average January Temperature

24.7°F (-4.1°C)

    •   Average July Temperature

74.7°F (23.7°C)

    •   Record High Temperature

105°F (40.6°C)

    •   Record Low Temperature

-25°F (-31.7°C)

Precipitation

    •   Average Annual Precipitation

34.6 inches (879 mm)

    •   Average Number of Rainy Days

107 days

    •   Average Number of Snowfall Days

25 days

    •   Average Annual Snowfall

29.6 inches (75 cm)

Humidity

    •   Average Annual Relative Humidity

73%

Wind

    •   Average Annual Wind Speed

10.6 mph (17.1 km/h)

    •   Prevailing Wind Direction

West

Sunshine

    •   Average Annual Sunshine

2,500 hours

Climate Summary

Winthrop Harbor, Illinois has a hot summer continental climate, characterized by hot, humid summers and cold, snowy winters. The average annual temperature is 49.3°F (9.6°C), with average January temperatures of 24.7°F (-4.1°C) and average July temperatures of 74.7°F (23.7°C). The average annual precipitation is 34.6 inches (879 mm), with an average of 107 rainy days and 25 snowfall days per year. The average annual snowfall is 29.6 inches (75 cm). The average annual relative humidity is 73%, and the average annual wind speed is 10.6 mph (17.1 km/h). Winthrop Harbor receives an average of 2,500 hours of sunshine per year.

Facts & Historical Information
(made with AI, use with caution)
Natural History

    •   Winthrop Harbor is home to the Illinois Beach State Park, a 6,500-acre coastal preserve featuring diverse ecosystems, including wetlands, prairies, and forests.

    •   The park is a haven for migratory birds, including warblers, vireos, and waterfowl.

    •   The Zion Natural Science Center, located within the park, offers educational programs and exhibits on the region's natural history.

Science

    •   The Abbott Laboratories Research and Development Center was established in Winthrop Harbor in 1951.

    •   Abbott's scientists have made significant contributions to medicine, including the development of Humira, a blockbuster drug for rheumatoid arthritis.

    •   The center also houses the Abbott Collection, an art museum showcasing works by Picasso, Monet, and other renowned artists.

Personalities

    •   Warren Buffett, the billionaire investor, has a vacation home in Winthrop Harbor.

    •   The late actor John Candy was born in nearby Newmarket, Ontario, and spent his childhood in Winthrop Harbor.

    •   The town is named after John Winthrop, the first governor of the Massachusetts Bay Colony.

Tourist Attractions
1.Illinois Beach State Park

(Zion, IL) - This park offers 6.5 miles of Lake Michigan shoreline, hiking trails, fishing, and camping.

2.Six Flags Great America

(Gurnee, IL) - This amusement park features over 100 rides, shows, and attractions.

3.Chicago Botanic Garden

(Glencoe, IL) - This garden features 385 acres of display gardens, natural areas, and educational programs.

Nearby Cities:

Zion, IL
Beach Park, ILWadsworth, IL
Waukegan, ILKenosha, WI
Gurnee, ILPleasant Prairie, WI
Park City, ILNorth Chicago, IL
Lindenhurst, ILThird Lake, IL
Somers, WIVenetian Village, IL
Knollwood, ILGreen Oaks, IL
Bristol, WILake Bluff, IL
Milwaukee, WI
Madison, WIAurora, IL
Grand Rapids, MIRockford, IL
Joliet, ILNaperville, IL
Elgin, ILSouth Bend, IN
West Town, ILNear North Side, IL
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