Our Proprietary 10-Day Forecast

Loading Forecast...

Current warnings over Johnston City, Illinois
Add warnings to your site:
<div style='text-align:center'><a href='https://f5wx.com/warnings/'>
  <img src="https://www.f5wx.com/warnings/warningsF5.gif" alt='F5Weather Warnings Map' />
<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.

Do not use our graphics for protection of life or property. Delays in image processing are possible.

You are free to embed our warning graphics into your web site using the code above. We just ask that you keep a link and credit to F5Weather as a source for the graphics.


View more weather maps.

Zoom Out

Current radar over Johnston City, Illinois red dot
Add this radar to your site:
<div style='text-align:center'><a href='https://f5wx.com/radar/'>
<img src='https://www.f5wx.com/radar/live/radar_midwest.gif' alt='F5Weather Radar'>
<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.

View more weather maps.

Zoom Out

Current satellite over Johnston City, Illinois red dot
Add this satellite to your site:
<div style='text-align:center'><a href='https://f5wx.com/satellite/'>
<img src='https://www.f5wx.com/satellite/live/ir_midwest.gif' alt='F5Weather Satellite'>
<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.

View more weather maps.

Zoom Out

Current surface weather map around Williamson 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.

View more weather maps.

Zoom Out

Temperatures right now near Johnston City, 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 Johnston City, IL please see our current conditions data on the left and right side of this page, or go to our current conditions page.

View more weather maps.

Zoom Out

Surface wind speed map over Johnston City, 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 Johnston City, IL, see the current conditions data on the left and right side of this page, or go to our current conditions page.

View more weather maps.

Zoom Out

Regional 24 hour rainfall expected near Johnston City, 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.

View more weather maps.

Zoom Out

Area snowfall accumulation expected around Williamson 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.

View more weather maps.

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.

View more weather maps.

Atlantic Hurricane and Tropical Storm Tracking Map
Add this hurricane tracker to your site:
<div style='text-align:center'><a href='https://www.f5wx.com/models/hurricane/atlantic.png'>
<img src='https://www.f5wx.com/models/hurricane/atlantic.png' alt='F5Weather Atlantic Hurricane and Tropical Storm Tracking Map'>
<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.

View more weather maps.

F5Weather Maps splash

To view the latest computer models, visit f5wx.com for access to the weather maps and guidance that meteorologists use to make their forecasts.
 
Get access to:
  • European ECMWF HRES
  • American GFS
  • Canadian GDPS GEM
  • German DWD ICON
  • British MetOffice's UKMET Unified Model
  • American NAM
  • American HRRR
  • American NBM - National Blend of Models
  • 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.
 
See the latest forecast data as the models update.
 
F5Weather Maps

Climate Summary
(made with AI, use with caution)
Johnston City, IL Climate Summary

General Climate

    •   Johnston City, IL has a humid continental climate, with hot, humid summers and cold, snowy winters.
    •   The average annual temperature is 53.3°F (11.8°C).
    •   The average annual precipitation is 41.8 inches (106.2 cm).

Summer

    •   The average summer temperature is 74.4°F (23.6°C).
    •   The average high temperature in July is 85.7°F (29.8°C).
    •   The average low temperature in July is 63.1°F (17.3°C).
    •   The average precipitation in July is 4.0 inches (10.2 cm).

Winter

    •   The average winter temperature is 29.2°F (-1.6°C).
    •   The average high temperature in January is 35.6°F (2.0°C).
    •   The average low temperature in January is 22.8°F (-5.1°C).
    •   The average precipitation in January is 2.9 inches (7.4 cm).

Spring and Fall

    •   The average spring temperature is 50.9°F (10.5°C).
    •   The average high temperature in April is 63.3°F (17.4°C).
    •   The average low temperature in April is 38.5°F (3.6°C).
    •   The average precipitation in April is 3.6 inches (9.1 cm).

    •   The average fall temperature is 50.9°F (10.5°C).
    •   The average high temperature in October is 63.3°F (17.4°C).
    •   The average low temperature in October is 38.5°F (3.6°C).
    •   The average precipitation in October is 3.6 inches (9.1 cm).

Extreme Weather

    •   The highest temperature ever recorded in Johnston City was 116°F (46.7°C) on July 14, 1954.
    •   The lowest temperature ever recorded in Johnston City was -28°F (-33.3°C) on January 10, 1985.
    •   The greatest amount of precipitation ever recorded in Johnston City in a single day was 9.0 inches (22.9 cm) on July 17, 1995.

Climate Change

    •   The climate of Johnston City is changing, as is the climate of the rest of the world.
    •   The average annual temperature in Johnston City has increased by about 1°F (0.6°C) since the late 19th century.
    •   The average annual precipitation in Johnston City has increased by about 5 inches (12.7 cm) since the late 19th century.
    •   The number of days with extreme heat (over 90°F or 32.2°C) has increased in Johnston City since the late 19th century.
    •   The number of days with extreme cold (below 0°F or -17.8°C) has decreased in Johnston City since the late 19th century.

Impacts of Climate Change

    •   The changing climate is having a number of impacts on Johnston City, including:
    •   More frequent and severe heat waves
    •   More frequent and severe droughts
    •   More frequent and severe floods
    •   Changes in plant and animal life
    •   Changes in the timing of seasonal events

Adaptation and Mitigation

    •   The city of Johnston City is taking steps to adapt to the changing climate, including:
    •   Investing in infrastructure to protect against flooding
    •   Planting trees to provide shade and reduce heat island effects
    •   Educating residents about the importance of energy efficiency and conservation
    •   Working with other communities to reduce greenhouse gas emissions

    •   The city of Johnston City is also working to mitigate the effects of climate change by reducing its greenhouse gas emissions. This includes:
    •   Investing in renewable energy sources
    •   Improving energy efficiency in city buildings and operations
    •   Promoting the use of public transportation and walking

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

    •   Johnston City is located in the Shawnee Hills ecoregion, known for its diverse flora and fauna.

    •   The city is home to the Herrin Coal Field, one of the largest coal deposits in the United States.

    •   The nearby Crab Orchard National Wildlife Refuge provides habitat for numerous bird species, including the endangered bald eagle.

Science

    •   Johnston City was a center of coal mining research in the early 20th century.

    •   The city is home to the Southern Illinois Coal Research Center, which conducts research on coal utilization and environmental impacts.

    •   Johnston City is also a major producer of wind energy, with several wind farms located nearby.

Personalities

  • John A. Logan:

    Civil War general and U.S. Senator, born in Johnston City.

  • Adlai E. Stevenson II:

    Governor of Illinois and Democratic presidential candidate, grew up in Johnston City.

  • Paul Simon:

    U.S. Senator and Illinois Lieutenant Governor, born in Johnston City.

    • Tourist Attractions
    1.Rend Lake

    A vast reservoir with over 18,900 acres of water and 140 miles of shoreline, offering opportunities for boating, fishing, swimming, and camping.

    2.Fort Massac State Park

    A historic site featuring the remains of a French fort built in 1757, as well as a museum and hiking trails.

    3.Shawnee National Forest

    A vast expanse of forest and wilderness areas, providing opportunities for hiking, camping, and wildlife viewing.

    Nearby Cities:

    West Frankfort, IL
    Herrin, ILMarion, IL
    Energy, ILZeigler, IL
    Crainville, ILCarterville, IL
    Cambria, ILRoyalton, IL
    Benton, ILChristopher, IL
    De Soto, ILCarbondale, IL
    Carrier Mills, ILGoreville, IL
    Sesser, ILHarrisburg, IL
    Evansville, IN
    Saint Charles, MOOwensboro, KY
    Saint Peters, MOFlorissant, MO
    Chesterfield, MOBelleville, IL
    Cape Girardeau, MOOakville, MO
    Wildwood, MOUniversity City, MO
    Hopkinsville, KY