Our Proprietary 10-Day Forecast

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Current warnings over Waterloo, 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 Waterloo, 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 Waterloo, 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 Monroe 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 Waterloo, 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 Waterloo, 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 Waterloo, 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 Waterloo, 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 Waterloo, 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 Monroe 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)
Waterloo, Illinois Climate Summary

Temperature

    •   Average annual temperature: 56.1°F (13.4°C)
    •   Average summer temperature: 74.6°F (23.7°C)
    •   Average winter temperature: 37.6°F (3.1°C)
    •   Highest recorded temperature: 114°F (45.6°C)
    •   Lowest recorded temperature: -22°F (-30°C)

Precipitation

    •   Average annual precipitation: 40.7 inches (103.4 cm)
    •   Average number of rainy days: 105
    •   Average snowfall: 17.8 inches (45.2 cm)

Humidity

    •   Average annual relative humidity: 74%
    •   Average summer relative humidity: 78%
    •   Average winter relative humidity: 69%

Wind

    •   Average annual wind speed: 10.2 mph (16.4 km/h)
    •   Prevailing wind direction: Southwest

Climate Classification

    •   Humid continental climate (Köppen climate classification: Dfa)

Summary

Waterloo, Illinois has a humid continental climate with hot, humid summers and cold, dry winters. The average annual temperature is 56.1°F (13.4°C), with average summer temperatures of 74.6°F (23.7°C) and average winter temperatures of 37.6°F (3.1°C). The average annual precipitation is 40.7 inches (103.4 cm), with an average of 105 rainy days per year. The average annual snowfall is 17.8 inches (45.2 cm). The average annual relative humidity is 74%, with an average summer relative humidity of 78% and an average winter relative humidity of 69%. The average annual wind speed is 10.2 mph (16.4 km/h), with the prevailing wind direction being southwest.

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

    •   Waterloo is located in the Mississippi River Valley and is home to diverse flora and fauna.

    •   The city is known for its limestone bluffs, which are home to rare plant species such as the glade cress and the prairie smoke.

    •   The Mississippi River provides habitat for a variety of fish, including bass, catfish, and walleye.

Science

    •   Waterloo is home to the Waterloo Research Institute (WRI), a non-profit organization that conducts research in the fields of environmental science, engineering, and medicine.

    •   The WRI has developed innovative technologies for water treatment, renewable energy, and cancer diagnosis.

Personalities

  • Dr. John Gorrie:

    A physician and inventor who is credited with developing the first mechanical refrigeration system in 1842. Gorrie was born in Scotland and practiced medicine in Waterloo.

  • Dr. William Beaumont:

    A surgeon who conducted pioneering research on the digestive system in the early 19th century. Beaumont's experiments were performed on a patient named Alexis St. Martin, who had a permanent opening in his stomach.

  • Dr. Norman Bethune:

    A Canadian physician and humanitarian who served as a volunteer doctor in the Spanish Civil War and the Chinese Communist Revolution. Bethune was born in Gravenhurst, Ontario, but his family moved to Waterloo when he was a child.

    • Tourist Attractions
    1.Fort de Chartres State Historic Site**

    2.Meramec Caverns**

    3.Cahokia Mounds State Historic Site**

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