Petros, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Petros, a community in Morgan County, Tennessee.
Today
88°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 2pm. Mostly sunny. High near 88, with temperatures falling to around 85 in the afternoon. Heat index values as high as 95. Northwest wind around 0 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Petros
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 34% |
| Tonight | 68°F | Chance Showers And Thunderstorms then Mostly Clear | 0 mph | 28% |
| Sunday | 86°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 22% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms | 0 mph | 34% |
| Monday | 86°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 40% |
| Monday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 mph | 61% |
| Tuesday | 80°F | Showers And Thunderstorms | 0 mph | 83% |
| Tuesday Night | 63°F | Showers And Thunderstorms | 0 mph | 83% |
| Wednesday | 74°F | Showers And Thunderstorms | 0 mph | 77% |
| Wednesday Night | 60°F | Showers And Thunderstorms | 0 mph | 77% |
| Thursday | 72°F | Chance Rain Showers | 0 mph | 33% |
| Thursday Night | 57°F | Chance Rain Showers then Partly Cloudy | 0 mph | 32% |
| Friday | 73°F | Slight Chance Rain Showers | 0 to 5 mph N | 16% |
| Friday Night | 55°F | Slight Chance Rain Showers then Partly Cloudy | 0 to 5 mph N | 16% |
Forecast source: National Weather Service (api.weather.gov) for Petros (36.103, -84.450). Updated through the day.
Growing snapshot for Petros
Last spring frost
Mar 31
First fall frost
Nov 4
Growing season
218 days
Hardiness zone
7a
More local growing data for Petros: nearby ZIP 37845 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Oak Ridge Asos, Tn (13.1 mi from Petros). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.