Watertown, TN Weather & Growing Conditions
This Afternoon
97°F
Sunny
Sunny, with a high near 97. Heat index values as high as 103. North northwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 97°F | Sunny | 5 mph NNW | 9% |
| Tonight | 70°F | Mostly Clear | 0 to 5 mph E | 11% |
| Saturday | 97°F | Sunny | 0 to 5 mph NW | 14% |
| Saturday Night | 71°F | Partly Cloudy | 0 to 5 mph SSE | 11% |
| Sunday | 96°F | Sunny | 5 mph SSW | 5% |
| Sunday Night | 71°F | Partly Cloudy | 5 mph S | 5% |
| Monday | 95°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 mph SW | 34% |
| Monday Night | 67°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 50% |
| Tuesday | 88°F | Showers And Thunderstorms Likely | 0 to 5 mph W | 61% |
| Tuesday Night | 63°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 61% |
| Wednesday | 82°F | Chance Rain Showers | 0 to 5 mph N | 35% |
| Wednesday Night | 60°F | Chance Rain Showers then Partly Cloudy | 0 to 5 mph N | 30% |
| Thursday | 79°F | Mostly Sunny | 0 to 10 mph N | 14% |
| Thursday Night | 59°F | Partly Cloudy | 0 to 5 mph NNE | 9% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Watertown, TN
Last spring frost
Apr 6
First fall frost
Oct 28
Growing season
206 days
Hardiness zone
7b
Explore more for Watertown, TN: full frost dates · planting calendar · Tennessee frost dates
Climate data from the nearest NOAA station, Lebanon, Tn (13.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.