Our Proprietary 10-Day Forecast

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Current warnings over Crystal Lake, 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 Crystal Lake, 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 Crystal Lake, 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 McHenry 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 Crystal Lake, 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 Crystal Lake, 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 Crystal Lake, 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 Crystal Lake, 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 Crystal Lake, 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 McHenry 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)
Crystal Lake, Illinois's climate is categorized as humid continental, characterized by significant seasonal temperature variations, with warm to hot, humid summers and cold, snowy winters.

Temperature


    •   Average annual temperature: 48.6°F (9.2°C)
    •   Average summer temperature (June-August): 72.8°F (22.7°C)
    •   Average winter temperature (December-February): 25.3°F (-3.7°C)
    •   Record highest temperature: 108°F (42.2°C)
    •   Record lowest temperature: -35°F (-37.2°C)

Precipitation


    •   Average annual precipitation: 35.4 inches (899 mm)
    •   Average snowfall: 34.1 inches (86.6 cm)
    •   Precipitation is distributed relatively evenly throughout the year, with slightly higher amounts in the spring and summer months.

Seasons


    •   Spring (March-May): Temperatures gradually rise, with average highs ranging from 40°F to 70°F (4.4°C to 21.1°C). Precipitation is moderate, with occasional thunderstorms.
    •   Summer (June-August): Warm to hot and humid, with average highs in the low 80s°F (around 28°C). Occasional heat waves can bring temperatures above 90°F (32.2°C). Thunderstorms are common.
    •   Fall (September-November): Temperatures cool down, with average highs ranging from 70°F to 40°F (21.1°C to 4.4°C). Precipitation is moderate, with occasional rain or snow.
    •   Winter (December-February): Cold and snowy, with average highs in the mid-30s°F (around 2°C). Snowfall is frequent, with occasional blizzards.

Climate Change Impact


    •   Rising temperatures: Crystal Lake has experienced a gradual increase in average temperatures over the past few decades, consistent with global climate change trends.
    •   Changes in precipitation patterns: The area may experience more intense rainfall events and an increase in the frequency and severity of droughts.
    •   Extreme weather events: The region is prone to extreme weather events such as heat waves, heavy rainfall, and severe thunderstorms. These events are expected to become more frequent and intense due to climate change.

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

    •   Crystal Lake is named after its pristine lake, formed by glaciers during the last ice age.

    •   The lake is home to a diverse ecosystem, including over 200 species of birds and fish.

    •   The surrounding Crystal Lake Park offers hiking trails, fishing spots, and a nature center.

Science

    •   In 1965, the Fermi National Accelerator Laboratory (Fermilab) was established near Crystal Lake.

    •   Fermilab is one of the world's leading particle physics research centers, home to the Tevatron and the Large Hadron Collider.

    •   The lab has made significant contributions to our understanding of the fundamental building blocks of matter.

Personalities

    •   Crystal Lake is the hometown of astronaut Richard Garriott, who flew on the International Space Station.

    •   The city is also associated with the horror film franchise \

Tourist Attractions
1.Crystal Lake Park District Beach**

2.Three Oaks Recreation Area**

3.Raue Center for the Arts**

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