Jefferson County, TN Weather Forecast
County weather hub
Mostly Sunny then Chance Showers And Thunderstorms
Compare major city weather across Jefferson County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 91. Heat index values as high as 102. Northwest wind around 0 mph. Chance of precipitation is 40%.
County Weather Overview
This county weather page brings together forecast coverage for Jefferson County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 1 of 1 mapped cities in Jefferson County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jul 17 to Jul 22, 2026
- Latest sync
- Jul 16, 2026 7:25 AM EDT
- Forecast office
- MRX
- Source
- NOAA / NWS
Daily Outlook
This Week in Jefferson County
Friday looks like the warmest upcoming period in Jefferson County at 91 degrees F.
Sunday Night is the coolest period ahead with temperatures near 69 degrees F.
The strongest winds are forecast for Friday Night at about 0 to 5 mph W.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 16, 2026 7:25 AM EDT
- Coverage
- 6 days
- Time zone
- America/New_York
- Forecast office
- MRX
- Radar station
- KMRX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms before 8pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 72. West wind 0 to 5 mph. Chance of precipitation is 60%.
Rain showers likely before 11am, then showers and thunderstorms. Partly sunny, with a high near 87. Southwest wind 0 to 5 mph. Chance of precipitation is 90%.
Showers and thunderstorms. Mostly cloudy, with a low around 70. Southwest wind 0 to 5 mph. Chance of precipitation is 90%.
Showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 80%.
Showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 69. Chance of precipitation is 80%.
Mostly sunny, with a high near 88.
Partly cloudy, with a low around 70.
A chance of showers and thunderstorms after 8am. Mostly sunny, with a high near 89. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 40%.
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 87.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jul 17
|
Mostly Sunny then Chance Showers And Thunderstorms
|
91°F |
0 mph
|
|
Friday Night
Jul 17
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
72°F |
0 to 5 mph
W
|
|
Saturday
Jul 18
|
Showers And Thunderstorms
|
87°F |
0 to 5 mph
SW
|
|
Saturday Night
Jul 18
|
Showers And Thunderstorms
|
70°F |
0 to 5 mph
SW
|
|
Sunday
Jul 19
|
Showers And Thunderstorms
|
86°F |
5 mph
W
|
|
Sunday Night
Jul 19
|
Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
69°F |
0 mph
|
|
Monday
Jul 20
|
Mostly Sunny
|
88°F |
0 to 5 mph
NW
|
|
Monday Night
Jul 20
|
Partly Cloudy
|
70°F |
0 mph
|
|
Tuesday
Jul 21
|
Chance Showers And Thunderstorms
|
89°F |
0 to 5 mph
W
|
|
Tuesday Night
Jul 21
|
Chance Showers And Thunderstorms
|
70°F |
0 to 5 mph
W
|
|
Wednesday
Jul 22
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
87°F |
0 to 5 mph
W
|
Major City Forecasts
Live forecast snapshots for major cities across Jefferson County.
Coverage
Forecast coverage currently spans 1 of 1 mapped cities in Jefferson County.
Largest mapped city population in this region: 2,634.
