Petros, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Petros, a community in Morgan County, Tennessee.
Today
83°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 83. Southeast wind around 0 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Petros
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 38% |
| Tonight | 67°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 38% |
| Wednesday | 82°F | Mostly Sunny then Showers And Thunderstorms Likely | 0 mph | 62% |
| Wednesday Night | 68°F | Showers And Thunderstorms Likely then Partly Cloudy | 0 mph | 63% |
| Thursday | 82°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 63% |
| Thursday Night | 68°F | Showers And Thunderstorms Likely then Partly Cloudy | 0 mph | 63% |
| Friday | 83°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 55% |
| Friday Night | 68°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 0 mph | 55% |
| Saturday | 82°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 69% |
| Saturday Night | 68°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 0 mph | 69% |
| Sunday | 83°F | Chance Showers And Thunderstorms | 0 mph | 47% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 47% |
| Monday | 83°F | Chance Showers And Thunderstorms | 0 mph | 43% |
| Monday Night | 70°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 43% |
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 Aug 4, 2026.