McKnightstown, PA Weather & Growing Conditions
This Afternoon
76°F
Partly Sunny
Partly sunny, with a high near 76. East wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Partly Sunny | 3 mph E | 10% |
| Tonight | 62°F | Chance Rain Showers | 3 to 8 mph SE | 51% |
| Sunday | 76°F | Showers And Thunderstorms | 5 to 10 mph S | 91% |
| Sunday Night | 55°F | Showers And Thunderstorms | 2 to 9 mph NW | 91% |
| Monday | 67°F | Chance Rain Showers | 6 to 9 mph NE | 26% |
| Monday Night | 51°F | Chance Rain Showers | 3 to 8 mph NE | 53% |
| Tuesday | 59°F | Rain Showers Likely | 9 mph NE | 65% |
| Tuesday Night | 48°F | Rain Showers Likely | 7 to 10 mph NE | 57% |
| Wednesday | 58°F | Chance Rain Showers | 10 mph NE | 47% |
| Wednesday Night | 49°F | Chance Rain Showers | 7 to 10 mph NE | 41% |
| Thursday | 61°F | Chance Rain Showers | 7 to 10 mph NE | 41% |
| Thursday Night | 48°F | Chance Rain Showers | 3 to 8 mph NE | 38% |
| Friday | 65°F | Slight Chance Rain Showers | 8 mph N | 22% |
| Friday Night | 49°F | Slight Chance Rain Showers | 2 to 7 mph N | 16% |
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.