Sullivan County, TN Weather Forecast
County weather hub
Sunny
Compare major city weather across Sullivan County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 75. West wind 0 to 5 mph.
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
- Oct 8 to Oct 11, 2026
- Latest sync
- Oct 5, 2026 6:04 PM EDT
- Forecast office
- MRX
- Source
- NOAA / NWS
Daily Outlook
This Week in Sullivan County
Thursday looks like the warmest upcoming period in Sullivan County at 75 degrees F.
Friday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Saturday at about 5 to 10 mph E.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 5, 2026 6:04 PM EDT
- Coverage
- 4 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
Mostly clear, with a low around 55.
Sunny, with a high near 75.
Partly cloudy, with a low around 54.
Mostly sunny, with a high near 74.
A slight chance of rain showers after 8pm. Mostly cloudy, with a low around 55. Chance of precipitation is 20%.
A chance of rain showers. Partly sunny, with a high near 69. Chance of precipitation is 50%.
A chance of rain showers. Mostly cloudy, with a low around 56.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 8
|
Sunny
|
75°F |
0 to 5 mph
W
|
|
Thursday Night
Oct 8
|
Mostly Clear
|
55°F |
0 to 5 mph
NE
|
|
Friday
Oct 9
|
Sunny
|
75°F |
0 to 5 mph
N
|
|
Friday Night
Oct 9
|
Partly Cloudy
|
54°F |
0 to 5 mph
E
|
|
Saturday
Oct 10
|
Mostly Sunny
|
74°F |
5 to 10 mph
E
|
|
Saturday Night
Oct 10
|
Slight Chance Rain Showers
|
55°F |
10 mph
E
|
|
Sunday
Oct 11
|
Chance Rain Showers
|
69°F |
10 mph
E
|
|
Sunday Night
Oct 11
|
Chance Rain Showers
|
56°F |
5 to 10 mph
E
|
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.
