Knox, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Knox, a borough in Clarion County, Pennsylvania.
This Afternoon
74°F
Mostly Sunny
Mostly sunny, with a high near 74. North wind around 6 mph.
7-day forecast for Knox
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Mostly Sunny | 6 mph N | 10% |
| Tonight | 54°F | Partly Cloudy | 6 mph NE | 10% |
| Saturday | 73°F | Partly Sunny | 6 mph E | 14% |
| Saturday Night | 61°F | Mostly Cloudy then Showers And Thunderstorms | 3 to 7 mph SE | 81% |
| Sunday | 73°F | Showers And Thunderstorms | 7 mph SW | 93% |
| Sunday Night | 53°F | Rain Showers Likely | 9 mph N | 64% |
| Monday | 67°F | Chance Rain Showers | 9 mph NE | 26% |
| Monday Night | 52°F | Chance Rain Showers | 8 to 12 mph E | 54% |
| Tuesday | 63°F | Rain Showers Likely | 12 mph E | 59% |
| Tuesday Night | 50°F | Showers And Thunderstorms Likely | 14 mph E | 63% |
| Wednesday | 61°F | Rain Showers Likely | 10 to 14 mph E | 63% |
| Wednesday Night | 49°F | Chance Showers And Thunderstorms | 13 mph E | 53% |
| Thursday | 63°F | Chance Rain Showers | 7 to 10 mph E | 47% |
| Thursday Night | 49°F | Chance Rain Showers | 7 mph E | 25% |
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 Sep 18, 2026.