Our Proprietary 10-Day Forecast

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Current warnings over Ottawa, 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 Ottawa, 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 Ottawa, 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 La Salle 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 Ottawa, 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 Ottawa, 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 Ottawa, 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 Ottawa, 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 Ottawa, 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 La Salle 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)
Ottawa, IL Climate Summary

General Climate

Ottawa, Illinois has a humid continental climate, with hot, humid summers and cold, snowy winters. The city experiences all four seasons, with average temperatures ranging from 20°F in January to 78°F in July.

Temperature

    •   Average annual temperature: 49.4°F
    •   Average summer temperature (June-August): 73.6°F
    •   Average winter temperature (December-February): 26.8°F
    •   Record high temperature: 115°F (July 14, 1936)
    •   Record low temperature: -38°F (January 20, 1985)

Precipitation

    •   Average annual precipitation: 35.7 inches
    •   Average snowfall: 30.6 inches
    •   Number of days with measurable precipitation: 105
    •   Wettest month: June (4.3 inches)
    •   Driest month: February (1.7 inches)

Humidity

    •   Average annual relative humidity: 74%
    •   Highest monthly relative humidity: January (81%)
    •   Lowest monthly relative humidity: June (64%)

Wind

    •   Average annual wind speed: 10.2 mph
    •   Prevailing wind direction: West-southwest

Severe Weather

    •   Ottawa is located in an area that is prone to severe weather, including tornadoes, hail, and thunderstorms.
    •   The city has been hit by several tornadoes in recent years, including an EF4 tornado in 2013 that caused widespread damage.
    •   Ottawa is also at risk for flooding, especially during the spring and summer months.

Climate Change

    •   The climate of Ottawa is changing, as it is in many parts of the world.
    •   The city is experiencing warmer temperatures, more extreme weather events, and changes in precipitation patterns.
    •   These changes are likely to continue in the future, and they could have a significant impact on the city and its residents.

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

    •   Ottawa is located at the confluence of the Illinois and Fox Rivers, creating a diverse ecosystem.

    •   Starved Rock State Park, just south of Ottawa, is home to unique sandstone canyons and waterfalls.

    •   The Illinois River Valley is a major migratory route for birds, with over 300 species observed.

Science

    •   Ottawa was the site of the first nuclear reactor in the Western Hemisphere, built by Argonne National Laboratory in 1942.

    •   The city is home to the Illinois Valley Community College, which offers a variety of science and technology programs.

    •   The Ottawa Science Center features interactive exhibits on science, technology, and the environment.

Personalities

    •   Edgar Lee Masters, author of the Pulitzer Prize-winning \

Tourist Attractions
1.Starved Rock State Park:

Located just 15 miles from Ottawa, this park features stunning sandstone canyons, waterfalls, and hiking trails.

2.Buffalo Rock State Park:

Another nearby park, Buffalo Rock offers scenic views of the Illinois River, as well as hiking, fishing, and camping opportunities.

3.Ottawa Riverwalk:

This scenic 2-mile paved trail follows the banks of the Ottawa River, providing a relaxing and picturesque setting for walking, biking, or rollerblading.

Nearby Cities:

Marseilles, IL
Deer Park, ILOglesby, IL
Seneca, ILLa Salle, IL
Peru, ILStreator, IL
Sheridan, ILEarlville, IL
Spring Valley, ILNewark, IL
Ladd, ILMendota, IL
Granville, ILMorris, IL
Somonauk, ILSandwich, IL
Chicago, IL
Aurora, ILRockford, IL
Joliet, ILNaperville, IL
Springfield, ILPeoria, IL
North Peoria, ILElgin, IL
Davenport, IAKenosha, WI
Waukegan, IL