Petersburg, TN Weather & Growing Conditions
Tonight
70°F
Mostly Clear
Mostly clear, with a low around 70. Heat index values as high as 97. North northeast wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 70°F | Mostly Clear | 0 mph | 10% |
| Saturday | 98°F | Sunny then Slight Chance Showers And Thunderstorms | 0 mph | 24% |
| Saturday Night | 70°F | Mostly Clear | 0 mph | 12% |
| Sunday | 97°F | Sunny | 0 to 5 mph SW | 9% |
| Sunday Night | 68°F | Partly Cloudy | 0 mph | 9% |
| Monday | 96°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 30% |
| Monday Night | 67°F | Chance Showers And Thunderstorms | 0 to 5 mph SSE | 47% |
| Tuesday | 91°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 to 5 mph WSW | 58% |
| Tuesday Night | 63°F | Showers And Thunderstorms Likely | 0 to 5 mph N | 58% |
| Wednesday | 84°F | Slight Chance Rain Showers | 0 to 5 mph N | 24% |
| Wednesday Night | 60°F | Slight Chance Rain Showers then Partly Cloudy | 0 to 5 mph NNE | 24% |
| Thursday | 82°F | Mostly Sunny | 0 to 5 mph NNE | 10% |
| Thursday Night | 58°F | Partly Cloudy | 0 to 5 mph NNE | 10% |
| Friday | 81°F | Mostly Sunny | 0 to 10 mph NNE | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Petersburg, TN
Last spring frost
Apr 14
First fall frost
Oct 22
Growing season
192 days
Hardiness zone
7b
Explore more for Petersburg, TN: full frost dates · planting calendar · Tennessee frost dates
Climate data from the nearest NOAA station, Lewisburg Exp Stn, Tn (11.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.