Our Proprietary 10-Day Forecast

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Current warnings over Romeoville, 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 Romeoville, 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 Romeoville, 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 Will 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 Romeoville, 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 Romeoville, 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 Romeoville, 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 Romeoville, 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 Romeoville, 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 Will 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)
Romeoville, IL Climate Summary

General Climate


Romeoville, Illinois experiences a humid continental climate, characterized by hot, humid summers and cold, snowy winters. The city is located in USDA Hardiness Zone 5b, with an average annual temperature of 51.2°F (10.7°C).

Temperature

    •   Summer

During the summer months (June, July, and August), average temperatures range from 73.5°F (23.1°C) to 85.6°F (29.8°C). High temperatures can reach into the 90s (°F) with high humidity levels, making it feel even hotter.

    •   Winter

Winter temperatures in Romeoville are cold, with average temperatures ranging from 21.9°F (-5.6°C) to 32.8°F (0.4°C) in January, the coldest month. Nighttime temperatures often drop below freezing, and wind chills can make it feel even colder.

    •   Spring and Fall

Spring and fall seasons in Romeoville are generally mild, with temperatures gradually warming up in the spring and cooling down in the fall. Average temperatures range from 40.4°F (4.7°C) to 62.6°F (17°C) in April and from 48.9°F (9.4°C) to 68.6°F (20.3°C) in October.

Precipitation

    •   Annual

Romeoville receives an average of 37.36 inches (94.9 cm) of precipitation annually, distributed fairly evenly throughout the year.

    •   Summer

Summer months tend to be the wettest, with frequent thunderstorms and occasional heavy downpours. July is the wettest month, with an average of 3.98 inches (10.1 cm) of rainfall.

    •   Winter

Winter precipitation primarily falls in the form of snow, with an average annual snowfall of 29.6 inches (75.2 cm). Snowfall can vary significantly from year to year, with some winters receiving much more snow than others.

    •   Spring and Fall

Spring and fall months typically experience a mix of rain and snow, with occasional thunderstorms.

Humidity

    •   Summer

Summer months in Romeoville are characterized by high humidity levels, which can make the heat feel even more oppressive. Relative humidity levels often exceed 70% during the day, and nighttime humidity levels can remain high as well.

    •   Winter

Winter months tend to have lower humidity levels, with relative humidity levels typically below 70%. However, when temperatures drop below freezing, the air can hold less moisture, resulting in very dry conditions.

Wind

    •   Summer

Summer winds in Romeoville are generally light to moderate, with an average wind speed of 9.6 mph (15.4 km/h) in July. Winds can be stronger during thunderstorms, with occasional severe storms producing damaging winds.

    •   Winter

Winter winds tend to be stronger, with an average wind speed of 11.3 mph (18.2 km/h) in January. Strong winds can contribute to wind chills, making it feel even colder.

Overall Climate

Romeoville, IL experiences a humid continental climate with hot, humid summers and cold, snowy winters. The city receives a moderate amount of precipitation throughout the year, with summer being the wettest season and winter being the driest. Humidity levels are high in the summer and lower in the winter. Winds are generally light to moderate, with stronger winds occurring during thunderstorms and in the winter.

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

    •   Romeoville is home to the Lockport Prairie Nature Preserve, a 3,000-acre ecosystem with diverse flora and fauna, including rare plants and migratory birds.

    •   The Des Plaines River flows through Romeoville, providing a habitat for aquatic life and recreational opportunities.

Science

    •   Argonne National Laboratory, one of the world's leading scientific research institutions, is located in Romeoville.

    •   The Fermi National Accelerator Laboratory (Fermilab), a major particle physics facility, is nearby.

Personalities

    •   Louis Joliet, the French explorer who discovered the Mississippi River, is believed to have camped in the Romeoville area in 1673.

    •   John Romeo, a prominent early settler, donated land for the town's first school and cemetery, giving Romeoville its name.

    •   Dr. Robert Goheen, the president of Princeton University from 1957 to 1972, was born and raised in Romeoville.

Tourist Attractions
1.Joliet Iron Works Historic Site**

2.Harrah's Joliet Casino & Hotel**

3.Silver Cross Field**

Nearby Cities:

Lockport, IL
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Plainfield, ILWoodridge, IL
Goodings Grove, ILHomer Glen, IL
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Rockdale, ILDarien, IL
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New Lenox, ILNaperville, IL
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