Our Proprietary 10-Day Forecast

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Current warnings over Knollwood, 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 Knollwood, 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 Knollwood, 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 Sangamon 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 Knollwood, 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 Knollwood, 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 Knollwood, 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 Knollwood, 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 Knollwood, 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 Sangamon 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)
Knollwood, Illinois Climate Summary

General Climate

    •   Knollwood, Illinois experiences a humid continental climate, characterized by warm, humid summers and cold, snowy winters.
    •   The area is located in USDA Hardiness Zone 5b, indicating that the average annual minimum temperature ranges from -15 to -10 degrees Fahrenheit.

Temperature

    •   Average High: The average high temperature in Knollwood ranges from 32°F in January to 85°F in July.
    •   Average Low: The average low temperature ranges from 17°F in January to 65°F in July.
    •   Record High: The record high temperature recorded in Knollwood is 105°F.
    •   Record Low: The record low temperature recorded in Knollwood is -26°F.

Precipitation

    •   Average Annual Precipitation: Knollwood receives an average of 36 inches of precipitation per year, which is distributed fairly evenly throughout the year.
    •   Snowfall: Knollwood typically receives an average of 25 inches of snow per year.

Humidity

    •   Relative Humidity: The average relative humidity in Knollwood ranges from 65% in the summer to 75% in the winter.

Wind

    •   Average Wind Speed: The average wind speed in Knollwood is 10 miles per hour.

Sunshine

    •   Average Sunshine Hours: Knollwood receives an average of 2,500 sunshine hours per year.

Overall

Knollwood, Illinois experiences a humid continental climate with warm, humid summers and cold, snowy winters. The area receives a moderate amount of precipitation throughout the year, including snowfall during the winter months.

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

    •   Knollwood is nestled within the Des Plaines River Valley, a rich ecosystem teeming with wildlife.

    •   The area boasts a diverse flora, including native wildflowers, ferns, and towering oak trees.

    •   The riverbanks are home to beavers, muskrats, and various bird species, creating a vibrant riparian habitat.

Science

    •   Knollwood is the birthplace of the Argonne National Laboratory (ANL), a renowned research facility established in 1942.

    •   ANL has made significant contributions to nuclear physics, materials science, and environmental research.

    •   The laboratory's scientists have played a crucial role in the development of the atomic bomb and the nuclear power industry.

Personalities

  • Enrico Fermi:

    The famed physicist and Nobel laureate was the first director of ANL and made groundbreaking discoveries in nuclear physics.

  • J. Robert Oppenheimer:

    The \

    • Tourist Attractions
    1.The Morton Arboretum:

    A 1,700-acre arboretum with over 4,000 species of trees and shrubs, including a Japanese garden, a children's garden, and a treehouse.

    2.Chicago Botanic Garden:

    A 385-acre botanic garden with 27 gardens and four natural areas, including a Japanese garden, a rose garden, and a children's garden.

    3.Brookfield Zoo:

    A 216-acre zoo with over 450 species of animals, including lions, tigers, gorillas, and elephants.

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