Our Proprietary 10-Day Forecast

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Current warnings over Savanna, 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 Savanna, 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 Savanna, 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 Carroll 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 Savanna, 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 Savanna, 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 Savanna, 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 Savanna, 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 Savanna, 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 Carroll 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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  • Canadian GDPS GEM
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  • GEFS, GEPS, MOGREPS & European Ensembles
  • Probabilities & Averages
  • 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)
Savanna, Illinois Climate Summary

Average Annual Temperature

48.7°F (9.3°C)

Average Annual Precipitation

36.96 inches (939 mm)

Average Annual Snowfall

24.8 inches (63 cm)

Climate Type

Continental

Growing Season

175 days

Hardiness Zone

5b

Summer

Summers in Savanna are warm and humid, with average high temperatures in the mid-80s Fahrenheit (low 30s Celsius). The average low temperature in July, the warmest month, is 65°F (18°C). Precipitation is common in the summer, with an average of 3.7 inches (94 mm) of rain per month.

Winter

Winters in Savanna are cold and snowy, with average high temperatures in the mid-30s Fahrenheit (low 2s Celsius). The average low temperature in January, the coldest month, is 17°F (-8°C). Snowfall is common in the winter, with an average of 6.8 inches (17 cm) of snow per month.

Spring

Springs in Savanna are mild and wet, with average high temperatures in the mid-50s Fahrenheit (low 10s Celsius). The average low temperature in April, the coolest month, is 36°F (2°C). Precipitation is common in the spring, with an average of 3.5 inches (89 mm) of rain per month.

Fall

Falls in Savanna are cool and dry, with average high temperatures in the mid-60s Fahrenheit (low 20s Celsius). The average low temperature in October, the coolest month, is 42°F (6°C). Precipitation is less common in the fall, with an average of 2.7 inches (69 mm) of rain per month.

Climate Change

The climate in Savanna is changing, as it is in the rest of the world. The average annual temperature has increased by about 1°F (0.6°C) since the late 19th century. The average annual precipitation has also increased, by about 5 inches (13 cm) since the late 19th century. These changes are likely due to human-caused climate change.

Climate Summary Table

| Month | Average High | Average Low | Average Precipitation |
|---|---|---|---|
| January | 35°F (2°C) | 17°F (-8°C) | 1.8 inches (46 mm) |
| February | 40°F (4°C) | 22°F (-6°C) | 1.7 inches (43 mm) |
| March | 50°F (10°C) | 30°F (-1°C) | 2.6 inches (66 mm) |
| April | 61°F (16°C) | 36°F (2°C) | 3.5 inches (89 mm) |
| May | 72°F (22°C) | 47°F (8°C) | 4.2 inches (107 mm) |
| June | 82°F (28°C) | 58°F (14°C) | 4.0 inches (102 mm) |
| July | 86°F (30°C) | 65°F (18°C) | 3.7 inches (94 mm) |
| August | 84°F (29°C) | 63°F (17°C) | 3.1 inches (79 mm) |
| September | 76°F (24°C) | 55°F (13°C) | 3.0 inches (76 mm) |
| October | 66°F (19°C) | 42°F (6°C) | 2.7 inches (69 mm) |
| November | 51°F (11°C) | 32°F (0°C) | 2.4 inches (61 mm) |
| December | 39°F (4°C) | 23°F (-5°C) | 2.0 inches (51 mm) |

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

    •   Savanna is located in the Upper Mississippi River Valley, a region known for its rich biodiversity.

    •   The city is home to the Savanna Army Depot, which encompasses over 13,000 acres of prairie, oak savanna, and wetlands.

    •   The Mississippi River and its backwaters provide habitat for a variety of fish, birds, and other wildlife.

Science

    •   Savanna was the site of the first successful use of a steam-powered dredge on the Mississippi River in 1837.

    •   The city played a role in the development of the steamboat industry, which revolutionized transportation on the river.

    •   Savanna is home to the Savanna Museum and Cultural Center, which houses exhibits on local history, science, and the environment.

Personalities

    •   John Deere, the inventor of the steel plow, lived in Savanna for a time.

    •   Ulysses S. Grant, the 18th President of the United States, visited Savanna during the Civil War.

    •   Savanna native John Phillip Sousa became a renowned composer and conductor, known for his patriotic marches.

Tourist Attractions
1.Mississippi Palisades State Park:

A scenic park with towering bluffs, hiking trails, and stunning views of the Mississippi River.

2.Savanna Historical Society Museum:

A museum showcasing the rich history of Savanna, including exhibits on Native American culture, the logging industry, and the town's role in the Civil War.

3.Chestnut Mountain Resort:

A popular destination for outdoor enthusiasts, offering skiing, snowboarding, zip-lining, and hiking trails in the winter and golf, hiking, and biking in the summer.

Nearby Cities:

Mount Carroll, IL
Preston, IAFulton, IL
Lanark, ILGeorgetown, IL
Clinton, IABellevue, IA
Stockton, ILCamanche, IA
Morrison, ILMadison, WI
Aurora, ILRockford, IL
Joliet, ILNaperville, IL
Cedar Rapids, IAPeoria, IL
North Peoria, ILElgin, IL
Davenport, IAWaukegan, IL
Arlington Heights, IL