Our Proprietary 10-Day Forecast

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Current warnings over Onarga, 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 Onarga, 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 Onarga, 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 Iroquois 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 Onarga, 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 Onarga, 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 Onarga, 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 Onarga, 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 Onarga, 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 Iroquois 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)
    •   Average Annual Temperature

50.2°F (10.1°C)

    •   Average Annual High Temperature

62.3°F (16.8°C)

    •   Average Annual Low Temperature

38.0°F (3.3°C)

    •   Average Annual Precipitation

36.0 inches (914 mm)

    •   Average Annual Snowfall

26.6 inches (676 mm)

    •   Average Number of Days with Measurable Precipitation

101

    •   Average Number of Days with Snowfall

22

    •   Average Annual Sunshine

2,423 hours

    •   Average Relative Humidity

73%

Climate Summary

Onarga, Illinois has a humid continental climate, with hot, humid summers and cold, snowy winters. The average annual temperature is 50.2°F (10.1°C), with an average annual high temperature of 62.3°F (16.8°C) and an average annual low temperature of 38.0°F (3.3°C). The average annual precipitation is 36.0 inches (914 mm), with the majority of the precipitation falling during the spring and summer months. The average annual snowfall is 26.6 inches (676 mm), with the majority of the snowfall occurring during the winter months. The average number of days with measurable precipitation is 101, and the average number of days with snowfall is 22. The average annual sunshine is 2,423 hours, and the average relative humidity is 73%.

Extreme Weather Events

Onarga, Illinois is occasionally affected by extreme weather events, such as tornadoes, hailstorms, and blizzards. The most common extreme weather event in Onarga is tornadoes, which can occur at any time of year but are most common during the spring and summer months. Hailstorms are also common in Onarga, and can occur during the spring and summer months. Blizzards are less common in Onarga, but can occur during the winter months.

Climate Change

The climate of Onarga, Illinois is changing due to climate change. The average annual temperature has increased by about 1.5°F (0.8°C) since the late 19th century, and the average annual precipitation has increased by about 5 inches (127 mm). The number of days with extreme weather events, such as tornadoes, hailstorms, and blizzards, is also increasing.

Facts & Historical Information
(made with AI, use with caution)
Onarga, Illinois, boasts a rich natural history and scientific legacy:

  • Onarga Meteorite:

    In 1838, a large meteorite crashed near Onarga, creating a 10-foot crater. Fragments of the meteorite are now on display at the Field Museum in Chicago.

  • Dr. Joseph LeConte:

    A prominent naturalist and geologist, LeConte taught at the University of California, Berkeley. He was born in Onarga in 1823 and his childhood experiences in the area influenced his scientific pursuits.

  • Onarga Prairie Restoration Project:

    The project aims to restore a 500-acre prairie ecosystem, preserving the native flora and fauna. It provides a glimpse into the natural history of the region and supports scientific research.

  • Onarga Military Academy:

    Founded in 1863, the academy was a prominent educational institution that trained young men for military and civilian life. It closed in 1975, but its campus is now a historical landmark.

  • Iroquois County Museum:

    The museum houses exhibits on the natural and cultural history of Iroquois County, including displays on local geology, wildlife, and Native American artifacts.

    • Tourist Attractions
    1.Onarga Military Museum

    - This museum houses a collection of military artifacts, including uniforms, weapons, and vehicles. It is located in the Onarga American Legion Post 504 building.

    2.Onarga Historical Society Museum

    - This museum tells the story of Onarga's past through exhibits on local history, culture, and industry. It is located in the Onarga Public Library.

    3.Iroquois County Courthouse

    - This historic courthouse is located in the center of Onarga. It was built in 1872 and is listed on the National Register of Historic Places.

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