Grainger County, TN Weather Forecast
County weather hub
Mostly Sunny then Chance Showers And Thunderstorms
Compare major city weather across Grainger County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
County Weather Overview
This county weather page brings together forecast coverage for Grainger 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 Grainger County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jul 15 to Jul 17, 2026
- Latest sync
- Jul 11, 2026 9:08 AM EDT
- Forecast office
- MRX
- Source
- NOAA / NWS
Daily Outlook
This Week in Grainger County
Thursday looks like the warmest upcoming period in Grainger County at 89 degrees F.
Friday Night is the coolest period ahead with temperatures near 70 degrees F.
The strongest winds are forecast for Wednesday at about 0 mph .
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 11, 2026 9:08 AM EDT
- Coverage
- 3 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 2am. Partly cloudy, with a low around 71. Chance of precipitation is 30%.
A chance of showers and thunderstorms between 8am and 2pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 71. Chance of precipitation is 40%.
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 2am. Partly cloudy, with a low around 70.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Jul 15
|
Mostly Sunny then Chance Showers And Thunderstorms
|
88°F |
0 mph
|
|
Wednesday Night
Jul 15
|
Chance Showers And Thunderstorms
|
71°F |
0 mph
|
|
Thursday
Jul 16
|
Chance Showers And Thunderstorms
|
89°F |
0 mph
|
|
Thursday Night
Jul 16
|
Chance Showers And Thunderstorms
|
71°F |
0 mph
|
|
Friday
Jul 17
|
Chance Showers And Thunderstorms
|
89°F |
0 mph
|
|
Friday Night
Jul 17
|
Chance Showers And Thunderstorms
|
70°F |
0 mph
|
Major City Forecasts
Live forecast snapshots for major cities across Grainger County.
Coverage
Forecast coverage currently spans 1 of 1 mapped cities in Grainger County.
Largest mapped city population in this region: 1,869.
