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Sullivan County, TN Weather Forecast
Sullivan County, TN Weather Forecast Dated: 636 AM Sun Oct 18 2026
Expect a cool pattern with a mix of sun and clouds and mostly dry weather over the coming period. moderate humidity and a stable pattern will dominate.
Sunday, October 18, 2026
Mid-Morning
42°F 6°C
Sunny
Mid-Afternoon
68°F 20°C
Sunny
Early-Evening
53°F 12°C
Sunny
Pleasant near 68°F 20°C, sunny throughout the day, with steady humidity and barometric pressure falling.
Monday, October 19, 2026
Mid-Morning
44°F 7°C
Sunny
Mid-Afternoon
68°F 20°C
Sunny
Early-Evening
54°F 12°C
Sunny
Comfortable with temperatures reaching 68°F 20°C, sunny throughout the day, with steady humidity and barometric pressure falling.
Tuesday, October 20, 2026
Mid-Morning
46°F 8°C
Partly Cloudy
Mid-Afternoon
70°F 21°C
Sunny
Early-Evening
55°F 13°C
Sunny
Enjoyable around 70°F 21°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure.
Wednesday, October 21, 2026
Mid-Morning
48°F 9°C
Sunny
Mid-Afternoon
70°F 21°C
Sunny
Early-Evening
55°F 13°C
Sunny
Mild temperatures up to 70°F 21°C, sunny throughout the day, with steady humidity and barometric pressure falling.
Thursday, October 22, 2026
Mid-Morning
47°F 9°C
Sunny
Mid-Afternoon
69°F 20°C
Sunny
Early-Evening
54°F 13°C
Sunny
Mild with a high of 69°F 20°C, sunny throughout the day, with lower humidity and steady pressure.
Friday, October 23, 2026
Mid-Morning
46°F 8°C
Sunny
Mid-Afternoon
70°F 21°C
Sunny
Early-Evening
57°F 14°C
Sunny
Pleasant near 70°F 21°C, sunny throughout the day, with lower humidity and steady pressure.
Saturday, October 24, 2026
Mid-Morning
48°F 9°C
Sunny
Mid-Afternoon
70°F 21°C
Sunny
Early-Evening
57°F 14°C
Sunny
Comfortable with temperatures reaching 70°F 21°C, sunny throughout the day, with lower humidity and steady pressure.
Sunday, October 25, 2026
Mid-Morning
47°F 9°C
Overcast
Mid-Afternoon
66°F 19°C
Overcast
Early-Evening
56°F 14°C
Overcast
Cool with a high near 66°F 19°C, overcast throughout the day, with steady humidity and barometric pressure falling.
Monday, October 26, 2026
Mid-Morning
50°F 10°C
Overcast
Mid-Afternoon
67°F 20°C
Overcast
Early-Evening
57°F 14°C
Overcast
Refreshing around 67°F 20°C, overcast throughout the day, with steady humidity and steady pressure.
Tuesday, October 27, 2026
Mid-Morning
54°F 12°C
Overcast
Mid-Afternoon
71°F 21°C
Overcast
Early-Evening
62°F 17°C
Overcast
Mild with a high of 71°F 21°C, overcast throughout the day, with lower humidity and steady pressure.
Wednesday, October 28, 2026
Mid-Morning
58°F 15°C
Overcast
Mid-Afternoon
73°F 23°C
Overcast
Early-Evening
63°F 17°C
Overcast
Pleasant near 73°F 23°C, overcast throughout the day, with lower humidity and barometric pressure falling.
Thursday, October 29, 2026
Mid-Morning
59°F 15°C
Light Fog
Mid-Afternoon
66°F 19°C
Scattered Showers
Early-Evening
63°F 17°C
Light Rain
Cool with a high near 66°F 19°C, locally heavy downpours at times, with steady humidity and barometric pressure falling.
Friday, October 30, 2026
Mid-Morning
61°F 16°C
Light Fog
Mid-Afternoon
66°F 19°C
Scattered Showers
Early-Evening
63°F 17°C
Overcast
Refreshing around 66°F 19°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure.
Saturday, October 31, 2026
Mid-Morning
58°F 14°C
Overcast
Mid-Afternoon
73°F 23°C
Scattered Showers
Early-Evening
66°F 19°C
Overcast
Mild temperatures up to 73°F 23°C, scattered downpours possible, with lower humidity and steady pressure.
Sullivan County, TN Weather Radar Map
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