St. Petersburg, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Petersburg, a borough in Clarion County, Pennsylvania.
Today
75°F
Mostly Cloudy
Mostly cloudy, with a high near 75. East wind around 6 mph.
7-day forecast for St. Petersburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Mostly Cloudy | 6 mph E | 3% |
| Tonight | 60°F | Showers And Thunderstorms | 5 mph SE | 86% |
| Sunday | 74°F | Showers And Thunderstorms | 7 mph SW | 94% |
| Sunday Night | 49°F | Chance Rain Showers then Mostly Cloudy | 8 mph N | 28% |
| Monday | 68°F | Mostly Cloudy then Slight Chance Rain Showers | 8 mph NE | 19% |
| Monday Night | 48°F | Chance Rain Showers | 9 mph E | 52% |
| Tuesday | 62°F | Chance Rain Showers | 12 mph E | 54% |
| Tuesday Night | 46°F | Rain Showers Likely | 13 mph E | 56% |
| Wednesday | 59°F | Rain Showers Likely | 13 mph E | 56% |
| Wednesday Night | 47°F | Showers And Thunderstorms Likely | 12 mph E | 61% |
| Thursday | 65°F | Rain Showers Likely | 9 mph E | 61% |
| Thursday Night | 46°F | Chance Showers And Thunderstorms | 7 mph E | 25% |
| Friday | 68°F | Partly Sunny then Slight Chance Rain Showers | 7 mph NE | 17% |
| Friday Night | 46°F | Slight Chance Rain Showers then Partly Cloudy | 6 mph NE | 17% |
Forecast source: National Weather Service (api.weather.gov) for St. Petersburg (41.161, -79.655). Updated through the day.
Growing snapshot for St. Petersburg
Last spring frost
May 9
First fall frost
Oct 11
Growing season
154 days
Hardiness zone
6a
More local growing data for St. Petersburg: nearby ZIP 16054 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Callensburg
Clarion
Crown
Foxburg
Hawthorn
Knox
Leeper
Marianne
Parker
Rimersburg
Shippenville
Sligo
Strattanville
Tylersburg
Vowinckel
Climate data from the nearest NOAA station, Clarion 3 Sw, Pa (12 mi from St. Petersburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.