Mercer, TN Weather & Growing Conditions
Today
98°F
Sunny
Sunny, with a high near 98. Heat index values as high as 101. West wind 0 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 98°F | Sunny | 0 to 5 mph W | 2% |
| Tonight | 72°F | Mostly Clear | 0 mph | 1% |
| Sunday | 98°F | Mostly Sunny | 0 to 5 mph WSW | 1% |
| Sunday Night | 72°F | Partly Cloudy | 0 to 5 mph S | 1% |
| Monday | 95°F | Mostly Sunny | 0 to 5 mph W | 10% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 0 to 5 mph NNE | 37% |
| Tuesday | 86°F | Slight Chance Rain Showers then Mostly Sunny | 5 to 10 mph N | 16% |
| Tuesday Night | 62°F | Mostly Clear | 5 to 15 mph N | 13% |
| Wednesday | 83°F | Mostly Sunny | 5 to 10 mph N | 8% |
| Wednesday Night | 60°F | Mostly Clear | 5 to 10 mph NNE | 3% |
| Thursday | 82°F | Mostly Sunny | 5 to 10 mph NNE | 3% |
| Thursday Night | 60°F | Partly Cloudy | 5 to 10 mph NNE | 3% |
| Friday | 82°F | Mostly Sunny | 5 to 10 mph NNE | 2% |
| Friday Night | 59°F | Partly Cloudy | 5 to 10 mph NNE | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mercer, TN
Last spring frost
Apr 5
First fall frost
Oct 29
Growing season
207 days
Hardiness zone
7b
Explore more for Mercer, TN: full frost dates · planting calendar · Tennessee frost dates
Climate data from the nearest NOAA station, Jackson Mckellar Ap, Tn (5.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.