Our Proprietary 10-Day Forecast

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Current warnings over Petersburg, 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 Petersburg, 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 Petersburg, 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 Petersburg, 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 Petersburg, 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 Petersburg, 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 Petersburg, 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 Petersburg, 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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  • 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)
Petersburg, Illinois Climate Summary

General Climate

    •   Petersburg, Illinois has a humid continental climate, characterized by hot, humid summers and cold, snowy winters.
    •   The city experiences all four seasons, with average temperatures ranging from 20°F (-7°C) in January to 80°F (27°C) in July.
    •   Petersburg receives an average of 38 inches (97 cm) of precipitation per year, which is evenly distributed throughout the year.

Summer

    •   Summers in Petersburg are hot and humid, with average temperatures in the mid-80s Fahrenheit (30s Celsius).
    •   The hottest month is July, with an average temperature of 80°F (27°C).
    •   Summer nights are typically warm, with temperatures rarely dropping below 60°F (16°C).
    •   Thunderstorms are common during the summer months, and can sometimes produce severe weather, such as hail and tornadoes.

Winter

    •   Winters in Petersburg are cold and snowy, with average temperatures in the mid-20s Fahrenheit (-3°C).
    •   The coldest month is January, with an average temperature of 20°F (-7°C).
    •   Winter nights are typically below freezing, with temperatures often dropping below 10°F (-12°C).
    •   Snowfall is common during the winter months, with Petersburg receiving an average of 20 inches (51 cm) of snow per year.

Spring and Fall

    •   Spring and fall in Petersburg are generally mild, with average temperatures in the 50s and 60s Fahrenheit (10s and 20s Celsius).
    •   Spring is typically wetter than fall, with more frequent rainfall.
    •   Fall is typically the driest season in Petersburg, with less frequent rainfall.

Overall, Petersburg, Illinois has a humid continental climate with hot, humid summers, cold, snowy winters, and mild spring and fall seasons.

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

    •   Petersburg is located in the heart of the Illinois River Valley, a major flyway for migratory birds.

    •   The Sangamon River, which flows through Petersburg, is home to a diverse fish population, including largemouth bass, catfish, and crappie.

    •   The nearby Emiquon National Wildlife Refuge provides habitat for over 300 bird species, including bald eagles and sandhill cranes.

Personalities

    •   Petersburg was the hometown of acclaimed author and journalist Carl Sandburg, who won three Pulitzer Prizes for his work.

    •   The city is also associated with the renowned artist Grant Wood, who painted several scenes of Petersburg and the surrounding area.

    •   In the 19th century, Petersburg was a major hub for the Underground Railroad, helping enslaved people escape to freedom in the North.

Tourist Attractions
1.Lincoln's New Salem State Historic Site

A living history museum that recreates the 1830s village where Abraham Lincoln lived and worked.

2.Petersburg National Battlefield

The site of the 1865 battle that ended the Civil War.

3.New Salem Chautauqua

An annual summer festival that features historical reenactments, music, and performances.

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