Harman US

McKnightstown, PA Weather & Growing Conditions

Tonight
53°F
Mostly Clear
Mostly clear, with a low around 53. North wind around 5 mph.

7-day forecast

WhenTempForecastWindPrecip
Tonight 53°F Mostly Clear 5 mph N 0%
Saturday 76°F Mostly Sunny 5 mph NE 3%
Saturday Night 63°F Chance Rain Showers 3 to 7 mph SE 39%
Sunday 78°F Showers And Thunderstorms 6 to 9 mph S 85%
Sunday Night 60°F Showers And Thunderstorms 2 to 8 mph NW 85%
Monday 69°F Chance Rain Showers 8 mph NE 38%
Monday Night 56°F Rain Showers Likely 5 to 8 mph NE 59%
Tuesday 61°F Rain Showers Likely 9 mph NE 70%
Tuesday Night 51°F Rain Showers Likely 7 to 10 mph NE 70%
Wednesday 59°F Rain Showers Likely 10 mph NE 56%
Wednesday Night 51°F Chance Showers And Thunderstorms 5 to 8 mph NE 53%
Thursday 61°F Chance Showers And Thunderstorms 8 mph NE 49%
Thursday Night 51°F Chance Rain Showers 1 to 5 mph N 42%
Friday 67°F Slight Chance Rain Showers 7 mph N 24%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for McKnightstown, PA

Last spring frost
Apr 28
First fall frost
Oct 17
Growing season
170 days
Hardiness zone
7a

Explore more for McKnightstown, PA: full frost dates · planting calendar · Pennsylvania frost dates

Climate data from the nearest NOAA station, Cashtown 1S, Pa (1.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.