Our Proprietary 10-Day Forecast

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Current warnings over Lacon, 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 Lacon, 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 Lacon, 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 Marshall 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 Lacon, 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 Lacon, 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 Lacon, 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 Lacon, 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 Lacon, 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 Marshall 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)
Lacon, Illinois Climate Summary

Temperature

    •   Average annual temperature: 51.6°F (10.9°C)
    •   Average summer temperature (June-August): 72.5°F (22.5°C)
    •   Average winter temperature (December-February): 29.4°F (-1.4°C)
    •   Record high temperature: 113°F (45°C) set on July 14, 1936
    •   Record low temperature: -26°F (-32°C) set on January 20, 1985

Precipitation

    •   Average annual precipitation: 36.26 inches (92.1 cm)
    •   Average snowfall: 24.5 inches (62.2 cm)
    •   Wettest month: May (4.33 inches or 11 cm)
    •   Driest month: February (1.75 inches or 4.4 cm)

Wind

    •   Average wind speed: 10.4 mph (16.7 km/h)
    •   Prevailing wind direction: West-southwest

Climate Classification

    •   Köppen climate classification: Dfa (continental climate with hot summers)

Climate Summary

Lacon, Illinois has a continental climate with hot summers and cold winters. The average annual temperature is 51.6°F (10.9°C). The average summer temperature (June-August) is 72.5°F (22.5°C), while the average winter temperature (December-February) is 29.4°F (-1.4°C). The record high temperature is 113°F (45°C), set on July 14, 1936, and the record low temperature is -26°F (-32°C), set on January 20, 1985.

Lacon receives an average of 36.26 inches (92.1 cm) of precipitation each year, including 24.5 inches (62.2 cm) of snow. The wettest month is May, with an average of 4.33 inches (11 cm) of precipitation, while the driest month is February, with an average of 1.75 inches (4.4 cm) of precipitation.

The average wind speed in Lacon is 10.4 mph (16.7 km/h), and the prevailing wind direction is west-southwest.

Overall, Lacon has a temperate climate with four distinct seasons. The summers are hot and humid, the winters are cold and snowy, and the spring and fall are mild.

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

    •   Lacon is located within the Grand Prairie Natural Division, known for its vast grasslands and wetlands.

    •   The Illinois River, a major tributary of the Mississippi River, flows through Lacon, providing a rich ecosystem for aquatic life.

    •   The Lacon Marsh State Natural Area preserves 1,300 acres of wetlands, supporting a diverse array of plant and animal species.

Science

    •   Lacon was the site of one of the first weather stations in Illinois, established in 1854.

    •   The town is home to the Lacon Public Library, which houses a collection of historical weather data.

    •   Several notable scientists have connections to Lacon, including Dr. John Strong Newberry, a geologist and paleontologist who surveyed the area in the 1850s.

Personalities

    •   Lacon was the birthplace of actor John Peter Altgeld, who served as Governor of Illinois from 1893 to 1897.

    •   The town is also associated with writer Carl Sandburg, who visited Lacon as a child and later wrote about the area in his poetry.

    •   Lacon native Dr. Frances Willard became a prominent suffragist and temperance advocate in the late 19th century.

Tourist Attractions
1.Starved Rock State Park:

Located about 15 miles east of Lacon, this park is known for its stunning sandstone canyons, waterfalls, and hiking trails.

2.Hegeler Carus Mansion:

This historic mansion was built in the late 1800s by German immigrant and industrialist Edward Hegeler. It is now a museum that offers tours of the mansion and its grounds.

3.Lacon Public Library:

This library is home to a collection of over 20,000 books, as well as a variety of programs and events for all ages.

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