Our Proprietary 10-Day Forecast

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Current warnings over Johnson City, Tennessee
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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 Johnson City, Tennessee 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 Johnson City, Tennessee 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 Washington County, TN

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 Johnson City, Tennessee

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 Johnson City, TN 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 Johnson City, TN

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 Johnson City, TN, 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 Johnson City, Tennessee

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 Washington County, Tennessee

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.
 
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.
 
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Climate Summary
(made with AI, use with caution)
Johnson City, Tennessee Climate Summary

General Climate

    •   Humid subtropical climate with hot, humid summers and mild winters.
    •   Experiences all four seasons, with distinct temperature variations throughout the year.

Temperature

    •   Average Annual Temperature

56.4°F (13.6°C)

    •   Average Summer Temperature (June-August)

76.1°F (24.5°C)

    •   Average Winter Temperature (December-February)

37.1°F (2.8°C)

    •   Record High Temperature

105°F (40.6°C)

    •   Record Low Temperature

-23°F (-30.6°C)

Precipitation

    •   Average Annual Precipitation

44.6 inches (113.3 cm)

    •   Average Monthly Precipitation

3.7 inches (9.4 cm)

    •   Wettest Month

March (4.8 inches / 12.2 cm)

    •   Driest Month

October (2.6 inches / 6.6 cm)

Snowfall

    •   Average Annual Snowfall

15.7 inches (40 cm)

    •   Average Monthly Snowfall

1.3 inches (3.3 cm)

    •   Snowiest Month

January (4.1 inches / 10.4 cm)

Humidity

    •   Average Annual Relative Humidity

73%

    •   Highest Humidity

Summer months (80-90%)

    •   Lowest Humidity

Winter months (50-60%)

Wind

    •   Average Wind Speed

9.2 mph (14.8 km/h)

    •   Prevailing Wind Direction

West-southwest

Sunshine

    •   Average Annual Sunshine

2,517 hours

    •   Average Daily Sunshine

6.9 hours

Climate Extremes

    •   Heat Index

Can exceed 100°F (37.8°C) during summer heat waves.

    •   Wind Chill

Can drop below 0°F (-17.8°C) during winter cold snaps.

    •   Tornadoes

Johnson City is located in an area with a moderate risk of tornadoes.

    •   Flooding

Heavy rainfall can cause flash flooding in low-lying areas.

Overall

Johnson City experiences a temperate climate with warm summers and mild winters. Precipitation is distributed throughout the year, with occasional snowstorms during the winter months. The area is also prone to occasional severe weather events, such as tornadoes and flooding.

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

    •   Johnson City is home to the Gray Fossil Site, one of the richest fossil deposits in North America dating back 14 million years.

    •   The city is situated on the Appalachian Trail, offering access to scenic hiking and wildlife viewing.

    •   The Buffalo Mountain Natural Area protects a diverse ecosystem, including rare plant species and waterfalls.

Science

    •   East Tennessee State University, located in Johnson City, is a major research institution with expertise in biomedical sciences, environmental studies, and engineering.

    •   The city is home to the Johnson City Space Center, a NASA facility that supports robotic missions to Mars.

Personalities

    •   Davy Crockett, the legendary frontiersman, lived in Johnson City before his famous adventures.

    •   Andrew Johnson, the 17th President of the United States, spent his early life in the area.

    •   Cormac McCarthy, the Pulitzer Prize-winning author, was born and raised in Johnson City.

Tourist Attractions
1.Gray Fossil Site and Museum:

Located just 15 minutes from Johnson City, this world-renowned paleontological site features a 5-acre fossil dig where visitors can uncover ancient marine fossils. The museum showcases a vast collection of fossils and exhibits on the site's geological history.

2.Bristol Motor Speedway:

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