Our Proprietary 10-Day Forecast

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Current warnings over Westchester, 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 Westchester, 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 Westchester, 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 Cook 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 Westchester, 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 Westchester, 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 Westchester, 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 Westchester, 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 Westchester, 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 Cook 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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  • American GFS
  • Canadian GDPS GEM
  • German DWD ICON
  • British MetOffice's UKMET Unified Model
  • American NAM
  • American HRRR
  • American NBM - National Blend of Models
  • GEFS, GEPS, MOGREPS & European Ensembles
  • Probabilities & Averages
  • 3-Ensemble Mean & more!
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.
 
See the latest forecast data as the models update.
 
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Climate Summary
(made with AI, use with caution)
Westchester, Illinois Climate Summary

General Climate

    •   Westchester, Illinois has a humid continental climate, characterized by hot, humid summers and cold, snowy winters.
    •   The average annual temperature is 50.5°F (10.3°C).
    •   The average annual precipitation is 36.9 inches (937 mm).

Summer

    •   The average summer temperature is 75.2°F (24°C).
    •   The average high temperature in July is 85.1°F (29.5°C).
    •   The average low temperature in July is 65.3°F (18.5°C).
    •   The average monthly precipitation in July is 4.0 inches (102 mm).

Winter

    •   The average winter temperature is 25.8°F (-3.4°C).
    •   The average high temperature in January is 32.8°F (0.4°C).
    •   The average low temperature in January is 18.8°F (-7.3°C).
    •   The average monthly precipitation in January is 2.2 inches (56 mm).

Spring and Fall

    •   The average spring temperature is 49.1°F (9.5°C).
    •   The average fall temperature is 51.8°F (11°C).
    •   The average monthly precipitation in April is 3.3 inches (84 mm).
    •   The average monthly precipitation in October is 2.9 inches (74 mm).

Climate Extremes

    •   The highest temperature ever recorded in Westchester was 108°F (42.2°C) on July 14, 1936.
    •   The lowest temperature ever recorded in Westchester was -27°F (-32.8°C) on January 20, 1985.
    •   The greatest amount of precipitation ever recorded in Westchester in a single month was 10.4 inches (264 mm) in September 2008.
    •   The greatest amount of snowfall ever recorded in Westchester in a single month was 30.5 inches (775 mm) in February 2011.

Climate Change

    •   The climate in Westchester is changing, and the changes are expected to continue in the future.
    •   The average annual temperature is projected to increase by 2-4°F (1.1-2.2°C) by the end of the century.
    •   The average annual precipitation is projected to increase by 5-10% by the end of the century.
    •   The number of extreme weather events, such as heat waves, droughts, and floods, is projected to increase in the future.

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

    •   Westchester lies within the Des Plaines River Valley, home to a diverse ecosystem including wetlands, prairies, and woodlands.

    •   The village is named after the Westchester Prairie, once a vast grassland that extended for miles.

    •   The prairie was home to bison, wolves, and other native species, and its remnants can still be found in local parks.

Science

    •   Westchester is home to the Fermi National Accelerator Laboratory (Fermilab), one of the world's leading particle physics research centers.

    •   Fermilab's Tevatron accelerator was the largest and most powerful particle accelerator ever built, and played a crucial role in the discovery of the top quark.

Personalities

    •   The village was founded in 1867 by James B. Waller, a prominent businessman and landowner.

    •   In the early 20th century, Westchester became a popular destination for artists and intellectuals, including the writer Sherwood Anderson and the painter Edward Hopper.

    •   Today, Westchester is a thriving community with a strong focus on education and the arts.

Tourist Attractions
1. Brookfield Zoo

2. Morton Arboretum

3. The Field Museum

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