Knox, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Knox, a borough in Clarion County, Pennsylvania.
Tonight
50°F
Mostly Clear
Mostly clear, with a low around 50. Southeast wind 1 to 7 mph.
7-day forecast for Knox
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Mostly Clear | 1 to 7 mph SE | 3% |
| Wednesday | 75°F | Partly Sunny | 5 to 9 mph SE | 6% |
| Wednesday Night | 59°F | Light Rain | 10 mph S | 98% |
| Thursday | 68°F | Chance Light Rain | 6 to 12 mph SW | 40% |
| Thursday Night | 45°F | Partly Cloudy | 1 to 5 mph SW | 2% |
| Friday | 62°F | Partly Sunny then Slight Chance Light Rain | 1 to 6 mph W | 16% |
| Friday Night | 42°F | Chance Light Rain | 5 mph NW | 29% |
| Saturday | 53°F | Chance Light Rain | 6 to 9 mph W | 34% |
| Saturday Night | 35°F | Chance Light Rain then Mostly Cloudy | 3 to 7 mph W | 34% |
| Sunday | 53°F | Partly Sunny then Slight Chance Light Rain | 3 to 9 mph SW | 18% |
| Sunday Night | 33°F | Chance Light Rain | 8 mph W | 25% |
| Monday | 54°F | Chance Light Rain | 8 to 12 mph W | 35% |
| Monday Night | 34°F | Chance Light Rain | 8 mph SW | 35% |
| Tuesday | 57°F | Mostly Sunny | 9 to 14 mph W | 14% |
Forecast source: National Weather Service (api.weather.gov) for Knox (41.234, -79.536). Updated through the day.
Growing snapshot for Knox
Last spring frost
May 9
First fall frost
Oct 11
Growing season
154 days
Hardiness zone
6a
More local growing data for Knox: nearby ZIP 16232 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Callensburg
Clarion
Crown
Foxburg
Hawthorn
Leeper
Marianne
Parker
Rimersburg
Shippenville
Sligo
St. Petersburg
Strattanville
Tylersburg
Vowinckel
Climate data from the nearest NOAA station, Clarion 3 Sw, Pa (6.2 mi from Knox). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.