Sullivan County, TN Weather Forecast
County weather hub
Showers And Thunderstorms
Compare major city weather across Sullivan County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A slight chance of rain showers before 8am, then showers and thunderstorms. Partly sunny, with a high near 79. Chance of precipitation is 90%.
County Weather Overview
This county weather page brings together forecast coverage for Sullivan County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 4 of 4 mapped cities in Sullivan County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- May 26, 2026
- Latest sync
- May 20, 2026 1:22 PM EDT
- Forecast office
- MRX
- Source
- NOAA / NWS
Daily Outlook
This Week in Sullivan County
Tuesday looks like the warmest upcoming period in Sullivan County at 79 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 64 degrees F.
The strongest winds are forecast for Tuesday at about 0 to 5 mph SW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- May 20, 2026 1:22 PM EDT
- Coverage
- 1 day
- 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
Showers and thunderstorms. Mostly cloudy, with a low around 64.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
May 26
|
Showers And Thunderstorms
|
79°F |
0 to 5 mph
SW
|
|
Tuesday Night
May 26
|
Showers And Thunderstorms
|
64°F |
0 mph
|
Major City Forecasts
Live forecast snapshots for major cities across Sullivan County.
Coverage
Forecast coverage currently spans 4 of 4 mapped cities in Sullivan County.
Largest mapped city population in this region: 54,112.
