Knoxville, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Knoxville, a borough in Tioga County, Pennsylvania.
This Afternoon
69°F
Partly Sunny
Partly sunny, with a high near 69. North wind around 8 mph.
7-day forecast for Knoxville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Partly Sunny | 8 mph N | 2% |
| Tonight | 47°F | Widespread Fog | 1 to 7 mph N | 1% |
| Saturday | 65°F | Widespread Fog then Partly Sunny | 0 to 3 mph E | 2% |
| Saturday Night | 54°F | Mostly Cloudy then Rain Showers | 2 to 6 mph SE | 86% |
| Sunday | 65°F | Showers And Thunderstorms | 7 mph SW | 95% |
| Sunday Night | 48°F | Rain Showers Likely | 8 mph N | 62% |
| Monday | 59°F | Partly Sunny then Slight Chance Rain Showers | 9 mph NE | 19% |
| Monday Night | 45°F | Chance Rain Showers | 7 to 10 mph NE | 46% |
| Tuesday | 57°F | Chance Rain Showers | 9 mph E | 46% |
| Tuesday Night | 43°F | Chance Rain Showers | 10 mph E | 43% |
| Wednesday | 55°F | Chance Rain Showers | 8 mph E | 43% |
| Wednesday Night | 44°F | Chance Showers And Thunderstorms | 8 mph E | 43% |
| Thursday | 57°F | Chance Showers And Thunderstorms | 7 mph E | 42% |
| Thursday Night | 45°F | Chance Rain Showers | 7 mph NE | 42% |
Forecast source: National Weather Service (api.weather.gov) for Knoxville (41.960, -77.438). Updated through the day.
Growing snapshot for Knoxville
Last spring frost
May 9
First fall frost
Oct 12
Growing season
155 days
Hardiness zone
5b
More local growing data for Knoxville: nearby ZIP 16928 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Arnot
Blossburg
Elkland
Lawrenceville
Liberty
Mainesburg
Mansfield
Millerton
Morris Run
Roseville
Sabinsville
Tioga
Wellsboro
Westfield
Climate data from the nearest NOAA station, Cowanesque Dam, Pa (14.5 mi from Knoxville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.