Petersburg, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Petersburg, a community in Mahoning County, Ohio.
Tonight
56°F
Partly Cloudy
Partly cloudy, with a low around 56. Northeast wind around 5 mph.
7-day forecast for Petersburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Partly Cloudy | 5 mph NE | 1% |
| Saturday | 77°F | Partly Sunny | 5 mph E | 14% |
| Saturday Night | 63°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SE | 74% |
| Sunday | 76°F | Showers And Thunderstorms | 7 mph W | 92% |
| Sunday Night | 57°F | Showers And Thunderstorms | 8 mph N | 83% |
| Monday | 68°F | Slight Chance Rain Showers | 9 mph NE | 23% |
| Monday Night | 55°F | Chance Rain Showers | 10 mph NE | 52% |
| Tuesday | 66°F | Showers And Thunderstorms Likely | 13 mph E | 56% |
| Tuesday Night | 54°F | Showers And Thunderstorms Likely | 13 to 16 mph E | 62% |
| Wednesday | 63°F | Rain Showers Likely | 14 mph E | 62% |
| Wednesday Night | 52°F | Chance Showers And Thunderstorms | 9 to 14 mph E | 53% |
| Thursday | 65°F | Chance Rain Showers | 7 to 10 mph E | 43% |
| Thursday Night | 52°F | Slight Chance Rain Showers | 3 to 7 mph NE | 17% |
| Friday | 69°F | Slight Chance Rain Showers | 7 mph N | 16% |
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 Sep 19, 2026.