Our Proprietary 10-Day Forecast

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Current warnings over Harrisburg, 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 Harrisburg, 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 Harrisburg, 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 Saline 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 Harrisburg, 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 Harrisburg, 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 Harrisburg, 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 Harrisburg, 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 Harrisburg, 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 Saline 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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  • 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.
 
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Climate Summary
(made with AI, use with caution)
Harrisburg, IL Climate Summary

Temperature

    •   Average annual temperature: 54.6°F (12.6°C)
    •   Average summer temperature (June-August): 76.6°F (24.8°C)
    •   Average winter temperature (December-February): 31.6°F (-0.2°C)
    •   Record high temperature: 115°F (46.1°C) on July 14, 1954
    •   Record low temperature: -32°F (-35.6°C) on January 10, 1982

Precipitation

    •   Average annual precipitation: 41.1 inches (104.4 cm)
    •   Average snowfall: 18.6 inches (47.2 cm)
    •   Wettest month: May (4.7 inches or 11.9 cm)
    •   Driest month: February (2.2 inches or 5.6 cm)

Humidity

    •   Average annual relative humidity: 73%
    •   Most humid month: January (78%)
    •   Least humid month: September (67%)

Wind

    •   Average annual wind speed: 10.2 mph (16.4 km/h)
    •   Most windy month: March (11.7 mph or 18.8 km/h)
    •   Least windy month: August (8.6 mph or 13.8 km/h)

Sunshine

    •   Average annual sunshine: 2,500 hours
    •   Sunniest month: July (310 hours)
    •   Cloudiest month: December (160 hours)

Climate Type

    •   Humid continental climate (Köppen Dfa)

General Climate Summary

Harrisburg, Illinois has a humid continental climate, with hot, humid summers and cold, dry winters. The average annual temperature is 54.6°F (12.6°C), with average summer temperatures in the mid-70s (°F) and average winter temperatures in the low 30s (°F). The city receives an average of 41.1 inches (104.4 cm) of precipitation per year, with most of the rain falling in the spring and summer months. Snowfall is relatively light, averaging 18.6 inches (47.2 cm) per year.

Harrisburg's climate is influenced by its location in the Midwest, which is characterized by a wide range of weather conditions. The city is prone to severe weather, including tornadoes, hailstorms, and thunderstorms. The city is also located in an area that is prone to flooding, especially during the spring and summer months.

Overall, Harrisburg's climate is typical of the Midwest, with hot, humid summers and cold, dry winters. The city's climate is also influenced by its location in an area that is prone to severe weather and flooding.

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

    •   Harrisburg is located in the Shawnee Hills, a region renowned for its rugged topography and diverse flora and fauna.

    •   The city is home to the Garden of the Gods Recreation Area, a natural sandstone rock formation with hiking trails and scenic views.

    •   The nearby Shawnee National Forest offers opportunities for hiking, camping, and wildlife viewing.

Science

    •   Harrisburg is the birthplace of Nobel Prize-winning chemist Paul Berg.

    •   The city is home to the Southeastern Illinois College, which has a strong science and technology program.

    •   The Harrisburg Unit 5 School District has a nationally recognized STEM (science, technology, engineering, and mathematics) program.

Personalities

    •   John A. Logan, a Union general during the Civil War, was born in Harrisburg.

    •   William Jennings Bryan, a three-time presidential candidate, practiced law in Harrisburg.

    •   Harriet Tubman, the famous abolitionist, is believed to have visited Harrisburg on the Underground Railroad.

Tourist Attractions
1.Shawnee National Forest:

A vast, scenic wilderness area with hiking trails, scenic drives, and camping opportunities.

2.Garden of the Gods Recreation Area:

A unique geological formation featuring towering sandstone bluffs and panoramic views.

3.Harrisburg City Park:

A charming park with a lake, playground, picnic areas, and a historic carousel.

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