Our Proprietary 10-Day Forecast

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Current warnings over Lannon, 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 Lannon, 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 Lannon, 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 Waukesha 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 Lannon, 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 Lannon, 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 Lannon, 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 Lannon, 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 Lannon, 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 Waukesha 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)
Lannon, Wisconsin Climate Summary

Temperature

    •   Average annual temperature: 46.4°F (8.0°C)
    •   Average January temperature: 20.6°F (-6.3°C)
    •   Average July temperature: 71.6°F (22.0°C)
    •   Record high temperature: 108°F (42.2°C)
    •   Record low temperature: -43°F (-41.7°C)

Precipitation

    •   Average annual precipitation: 31.5 inches (800 mm)
    •   Average snowfall: 42.7 inches (108 cm)
    •   Average number of rainy days: 104
    •   Average number of snowy days: 37

Humidity

    •   Average annual relative humidity: 72%
    •   Average summer relative humidity: 75%
    •   Average winter relative humidity: 68%

Wind

    •   Average annual wind speed: 10.2 mph (16.4 km/h)
    •   Average summer wind speed: 9.8 mph (15.8 km/h)
    •   Average winter wind speed: 10.7 mph (17.2 km/h)

Sunshine

    •   Average annual sunshine: 2,464 hours
    •   Average summer sunshine: 2,800 hours
    •   Average winter sunshine: 1,900 hours

Climate Type

    •   Humid continental climate (Köppen climate classification: Dfb)

Climate Summary

Lannon, Wisconsin has a humid continental climate with warm, humid summers and cold, snowy winters. The average annual temperature is 46.4°F (8.0°C), with average January and July temperatures of 20.6°F (-6.3°C) and 71.6°F (22.0°C), respectively. The average annual precipitation is 31.5 inches (800 mm), with an average snowfall of 42.7 inches (108 cm). The average annual relative humidity is 72%, with an average summer relative humidity of 75% and an average winter relative humidity of 68%. The average annual wind speed is 10.2 mph (16.4 km/h), with an average summer wind speed of 9.8 mph (15.8 km/h) and an average winter wind speed of 10.7 mph (17.2 km/h). The average annual sunshine is 2,464 hours, with an average summer sunshine of 2,800 hours and an average winter sunshine of 1,900 hours.

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

    •   Lannon is renowned for its Niagara Escarpment, a 1,000-foot-high limestone cliff that forms a natural boundary between Wisconsin and Illinois.

    •   The escarpment is home to a diverse ecosystem, including rare plants and animals such as the eastern massasauga rattlesnake and the dwarf lake iris.

    •   The Lannon Stone Quarry, once a major source of limestone for buildings in Milwaukee and Chicago, is now a popular spot for rock climbing and fossil hunting.

Science

    •   Lannon was the site of the first successful experimental transmission of wireless radio signals by Guglielmo Marconi in 1893.

    •   The Lannon Observatory, established in 1936, is one of the oldest private observatories in Wisconsin.

    •   The Lannon Meteorite, a 4-pound fragment of a larger meteorite, was discovered in the town in 1966.

Personalities

    •   John Lannon, an Irish immigrant, founded the town in 1836 and established the limestone quarry that became its namesake.

    •   Father James Groppi, a civil rights activist, was born in Lannon in 1930.

    •   David Gruber, a marine biologist and National Geographic Explorer, grew up in Lannon.

Tourist Attractions
1.Lannon Stone Quarry Park

is a 24-acre park that features a historic limestone quarry, hiking trails, and picnic areas. The quarry was once a major source of limestone for buildings in Milwaukee and Chicago.

2.The Old World Wisconsin

is a living history museum that recreates the life of German, Norwegian, and Danish immigrants in the 1800s. The museum has over 60 historic buildings, including a church, schoolhouse, and blacksmith shop.

3.The Milwaukee County Zoo

is home to over 2,000 animals from around the world. The zoo has a variety of exhibits, including a rainforest, desert, and polar bear habitat.

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