Our Proprietary 10-Day Forecast

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Current warnings over Jefferson, Wisconsin
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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 Jefferson, Wisconsin 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 Jefferson, Wisconsin 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 Jefferson County, WI

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 Jefferson, Wisconsin

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 Jefferson, WI 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 Jefferson, WI

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 Jefferson, WI, 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 Jefferson, Wisconsin

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 Jefferson County, Wisconsin

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)
Jefferson, Wisconsin, in the United States, experiences a humid continental climate, characterized by warm, humid summers and cold, snowy winters. Here's a summary of Jefferson's climate:

Temperature


    •   Average Annual Temperature: 46.8°F (8.2°C)
    •   Average Summer Temperature (June-August): 70.5°F (21.4°C)
    •   Average Winter Temperature (December-February): 22.8°F (-5.1°C)
    •   Highest Recorded Temperature: 109°F (43°C)
    •   Lowest Recorded Temperature: -37°F (-38°C)

Precipitation


    •   Average Annual Precipitation: 33.5 inches (851 mm)
    •   Average Snowfall: 45.8 inches (116 cm)
    •   Most Precipitation: June (4.4 inches or 112 mm)
    •   Least Precipitation: February (1.6 inches or 41 mm)

Climate Conditions


    •   Summers in Jefferson are typically warm and humid, with occasional hot and humid days.
    •   Winters are cold and snowy, with frequent snowstorms and below-freezing temperatures.
    •   Spring and fall seasons are generally mild and transitional, with variable weather conditions.
    •   Jefferson experiences occasional severe weather events, such as thunderstorms, hail, and tornadoes, primarily during the spring and summer months.

Growing Season


    •   The average frost-free period in Jefferson lasts from late April to early October, providing approximately 170 days for outdoor plant growth.

Climate Change Impact


    •   Like many regions, Jefferson is experiencing the effects of climate change, including rising temperatures, changes in precipitation patterns, and more frequent extreme weather events.
    •   Warmer winters have resulted in less snowfall and shorter snow cover duration.
    •   Heavier rainfall events have increased the risk of flooding and erosion.
    •   Climate change is also affecting local ecosystems, agriculture, and human health in the Jefferson area.

Overall, Jefferson, Wisconsin, experiences a humid continental climate with distinct seasons, warm summers, cold winters, and moderate precipitation throughout the year.

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

    •   Jefferson is located within the Rock River Basin, a significant watershed for the Upper Midwest.

    •   The city is home to the Jefferson Marsh Wildlife Area, a 2,000-acre wetland complex that supports a diverse array of birdlife and other wildlife.

Science

    •   In the 19th century, Jefferson was a hub for scientific research and innovation.

    •   The city was home to the Jefferson County Agricultural Society, which conducted experiments and promoted agricultural advancements.

    •   Jefferson was also the birthplace of John Muir, the renowned naturalist and conservationist.

Personalities

  • John Muir (1838-1914):

    Born in Jefferson, Muir became a prominent advocate for the preservation of wilderness and founded the Sierra Club.

  • Mary Todd Lincoln (1818-1882):

    The wife of President Abraham Lincoln, Mary Todd Lincoln spent her childhood in Jefferson and attended the Jefferson Academy.

  • John C. Fremont (1813-1890):

    A renowned explorer and politician, Fremont led several expeditions to the American West and played a key role in the acquisition of California. He had ties to Jefferson through his wife, Jessie Benton Fremont.

    • Tourist Attractions
    1.Jefferson County Historical Society Museum**

    2.Jefferson Marsh Natural Area**

    3.Lake Mills Aztalan State Park**

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