Harman US

Unionville, TN Weather & Growing Conditions

This Afternoon
100°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Sunny, with a high near 100. Heat index values as high as 99. Northwest wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
This Afternoon 100°F Slight Chance Showers And Thunderstorms 5 mph NW 18%
Tonight 70°F Slight Chance Showers And Thunderstorms then Mostly Clear 0 to 5 mph SSE 19%
Sunday 98°F Sunny then Slight Chance Showers And Thunderstorms 5 mph SW 18%
Sunday Night 71°F Slight Chance Showers And Thunderstorms then Partly Cloudy 0 to 5 mph S 15%
Monday 97°F Mostly Sunny then Chance Showers And Thunderstorms 0 to 5 mph WSW 31%
Monday Night 67°F Chance Showers And Thunderstorms 0 to 5 mph S 40%
Tuesday 92°F Mostly Sunny then Showers And Thunderstorms Likely 0 to 5 mph NNE 58%
Tuesday Night 64°F Showers And Thunderstorms Likely 0 to 5 mph N 58%
Wednesday 85°F Chance Rain Showers 5 mph NNW 42%
Wednesday Night 61°F Chance Showers And Thunderstorms 0 to 5 mph N 31%
Thursday 83°F Mostly Sunny 0 to 5 mph N 12%
Thursday Night 58°F Partly Cloudy 0 to 5 mph NNE 10%
Friday 84°F Mostly Sunny 0 to 10 mph N 5%
Friday Night 57°F Partly Cloudy 5 to 10 mph NNE 5%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Unionville, TN

Last spring frost
Apr 14
First fall frost
Oct 25
Growing season
192 days
Hardiness zone
7b

Explore more for Unionville, TN: full frost dates · planting calendar · Tennessee frost dates

Climate data from the nearest NOAA station, Christiana 5W, Tn (7.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.