Petersburg, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Petersburg, a community in Mahoning County, Ohio.
Today
85°F
Sunny
Sunny, with a high near 85. East wind around 2 mph.
7-day forecast for Petersburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Sunny | 2 mph E | 0% |
| Tonight | 63°F | Mostly Clear | 3 mph E | 1% |
| Wednesday | 87°F | Partly Sunny then Chance Showers And Thunderstorms | 5 mph S | 54% |
| Wednesday Night | 66°F | Chance Showers And Thunderstorms | 2 mph S | 44% |
| Thursday | 86°F | Showers And Thunderstorms Likely | 2 to 7 mph SW | 66% |
| Thursday Night | 66°F | Showers And Thunderstorms Likely | 5 mph SW | 66% |
| Friday | 83°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 3 to 7 mph SW | 76% |
| Friday Night | 64°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph SW | 76% |
| Saturday | 84°F | Chance Showers And Thunderstorms | 3 to 7 mph SW | 39% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 39% |
| Sunday | 86°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 3 to 8 mph SW | 18% |
| Sunday Night | 67°F | Chance Showers And Thunderstorms | 7 mph SW | 26% |
| Monday | 86°F | Chance Rain Showers | 7 to 10 mph SW | 37% |
| Monday Night | 66°F | Chance Showers And Thunderstorms | 5 to 8 mph SW | 49% |
Forecast source: National Weather Service (api.weather.gov) for Petersburg (40.910, -80.534). Updated through the day.
Growing snapshot for Petersburg
Last spring frost
Apr 30
First fall frost
Oct 23
Growing season
175 days
Hardiness zone
6a
More local growing data for Petersburg: nearby ZIP 44454 weather · frost dates · planting calendar · Ohio frost dates
Nearby towns & communities
Austintown
Beloit
Campbell
Canfield
Craig Beach
Damascus
East Alliance
Lake Milton
Lowellville
Maple Ridge
Mineral Ridge
New Middletown
New Springfield
North Lima
Poland
Sebring
Struthers
Woodworth
Youngstown
Climate data from the nearest NOAA station, New Castle 1 N, Pa (11.6 mi from Petersburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.