Our Proprietary 10-Day Forecast

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Current warnings over Cahokia, 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 Cahokia, 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 Cahokia, 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 St. Clair 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 Cahokia, 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 Cahokia, 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 Cahokia, 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 Cahokia, 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 Cahokia, 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 St. Clair 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)
Cahokia, IL Climate Summary

General Climate

    •   Cahokia, Illinois, experiences a humid continental climate, characterized by hot, humid summers and cold, snowy winters.
    •   The city is located in USDA hardiness zone 5b, with an average annual temperature of 54.8°F (12.7°C).

Temperature

    •   Summer (June-August): Average high temperatures range from 86-90°F (30-32°C), with average lows in the mid-60s to low 70s °F (19-22°C).
    •   Winter (December-February): Average high temperatures are in the mid-30s to low 40s °F (1-6°C), with average lows dropping below freezing, typically in the teens or low 20s °F (-8 to -5°C).

Precipitation

    •   Cahokia receives an average of 41.25 inches (104.8 cm) of precipitation annually, distributed fairly evenly throughout the year.
    •   The wettest months are typically April, May, and June, with average precipitation of around 4 inches (10 cm) each.
    •   The driest month is usually February, with an average of around 2 inches (5 cm) of precipitation.

Snowfall

    •   Cahokia averages around 20 inches (51 cm) of snowfall annually, with the majority occurring from December to February.
    •   Snowfall can vary significantly from year to year, with some winters seeing much more or less snow than average.

Wind

    •   The prevailing wind direction in Cahokia is from the west-southwest, with average wind speeds of around 10 mph (16 km/h).
    •   Strong winds can occur during thunderstorms or other severe weather events.

Humidity

    •   Cahokia experiences high humidity levels throughout the year, especially during the summer months.
    •   Average relative humidity ranges from around 60% in the afternoon to 90% or higher in the early morning.

Climate Extremes

    •   Record high temperature: 117°F (47°C) on July 14, 1954
    •   Record low temperature: -38°F (-39°C) on January 5, 1999
    •   Highest monthly precipitation: 13.14 inches (33.4 cm) in July 1993
    •   Highest daily precipitation: 6.85 inches (17.4 cm) on June 22, 2013
    •   Highest annual snowfall: 55.6 inches (141.2 cm) in the winter of 1978-1979

Overall

Cahokia's climate is characterized by hot, humid summers, cold, snowy winters, and moderate precipitation throughout the year. The city experiences a wide range of weather conditions, including thunderstorms, tornadoes, and occasional extreme heat or cold.

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

    •   Cahokia was a vast ancient city built by the Mississippian culture between 1050-1350 CE.

    •   It was the largest pre-Columbian settlement north of Mexico, with an estimated population of 10,000-20,000.

    •   The city was surrounded by fertile floodplains, which supported extensive agriculture.

    •   The Cahokia people were skilled engineers who built a complex system of earthen mounds, including the iconic Monks Mound, the largest prehistoric earthen structure in the Americas.

Science

    •   Cahokia was a center of astronomical knowledge. The Monks Mound is aligned with the solstices and equinoxes.

    •   The Cahokia people used advanced agricultural techniques, including crop rotation and irrigation.

    •   They also developed a sophisticated system of trade and exchange, with goods from as far away as the Gulf of Mexico and the Great Lakes.

Personalities

  • Chiefdoms:

    Cahokia was ruled by a succession of powerful chiefs who oversaw the construction of the city's mounds and managed its vast resources.

  • Medicine Men:

    The Cahokia people had skilled medicine men who used herbal remedies and spiritual practices to treat illnesses.

  • Artists:

    Cahokia was home to talented artists who created intricate pottery, jewelry, and sculptures.

    • Tourist Attractions
    1.Cahokia Mounds State Historic Site

    - A UNESCO World Heritage Site and the largest pre-Columbian settlement north of Mexico. Explore the remains of an ancient Native American city with massive earthen mounds, plazas, and artifacts.

    2.St. Louis Arch

    - Located just across the Mississippi River in St. Louis, Missouri, this iconic monument offers breathtaking views of the city and the Gateway Arch National Park.

    3.Jefferson National Expansion Memorial

    - Also known as the Gateway Arch National Park, this park encompasses the St. Louis Arch and the surrounding area, providing a historical and cultural experience of the westward expansion of the United States.

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