Petersburg, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Petersburg, a borough in Huntingdon County, Pennsylvania.
Today
73°F
Partly Sunny
Partly sunny, with a high near 73. East wind around 3 mph.
7-day forecast for Petersburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Partly Sunny | 3 mph E | 2% |
| Tonight | 61°F | Rain Showers | 2 to 6 mph SE | 80% |
| Sunday | 75°F | Showers And Thunderstorms | 6 mph S | 87% |
| Sunday Night | 52°F | Chance Showers And Thunderstorms | 3 to 7 mph NW | 44% |
| Monday | 67°F | Mostly Cloudy then Slight Chance Rain Showers | 6 mph NE | 17% |
| Monday Night | 50°F | Rain Showers Likely | 6 mph NE | 61% |
| Tuesday | 59°F | Rain Showers Likely | 7 mph E | 62% |
| Tuesday Night | 48°F | Chance Rain Showers | 8 mph E | 54% |
| Wednesday | 58°F | Chance Rain Showers | 8 mph E | 52% |
| Wednesday Night | 48°F | Chance Rain Showers | 7 mph E | 43% |
| Thursday | 61°F | Chance Rain Showers | 5 mph E | 45% |
| Thursday Night | 47°F | Chance Showers And Thunderstorms | 5 mph NE | 41% |
| Friday | 66°F | Chance Rain Showers | 5 mph N | 26% |
| Friday Night | 48°F | Slight Chance Rain Showers then Mostly Cloudy | 5 mph N | 17% |
Forecast source: National Weather Service (api.weather.gov) for Petersburg (40.573, -78.051). Updated through the day.
Growing snapshot for Petersburg
Last spring frost
Apr 19
First fall frost
Oct 28
Growing season
191 days
Hardiness zone
6b
More local growing data for Petersburg: nearby ZIP 16611 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Alexandria
Allenport
Allensville
Beavertown
Broad Top City
Burnt Cabins
Cassville
Cedar Crest
Coalmont
Dudley
Huntingdon
Kistler
Mapleton
Marklesburg
McConnellstown
Mill Creek
Mount Union
Orbisonia
Robertsdale
Rockhill
Saltillo
Shade Gap
Shirleysburg
Three Springs
Wood
Climate data from the nearest NOAA station, Raystown Lake 2, Pa (13.1 mi from Petersburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.