McKnightstown, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for McKnightstown, a community in Adams County, Pennsylvania.
This Afternoon
74°F
Mostly Sunny
Mostly sunny, with a high near 74. South wind around 9 mph.
7-day forecast for McKnightstown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Mostly Sunny | 9 mph S | 1% |
| Tonight | 61°F | Mostly Cloudy then Rain Showers | 6 to 10 mph S | 95% |
| Thursday | 74°F | Rain Showers | 3 to 10 mph S | 80% |
| Thursday Night | 54°F | Chance Rain Showers then Mostly Cloudy | 2 mph W | 51% |
| Friday | 68°F | Partly Sunny | 0 to 3 mph W | 10% |
| Friday Night | 45°F | Partly Cloudy | 1 to 6 mph NW | 10% |
| Saturday | 58°F | Mostly Sunny then Slight Chance Rain Showers | 7 to 13 mph NW | 16% |
| Saturday Night | 40°F | Slight Chance Rain Showers then Partly Cloudy | 8 to 12 mph NW | 16% |
| Sunday | 59°F | Mostly Sunny | 9 to 13 mph NW | 4% |
| Sunday Night | 38°F | Mostly Clear | 8 mph W | 0% |
| Monday | 60°F | Sunny | 8 to 13 mph W | 0% |
| Monday Night | 37°F | Mostly Clear | 3 to 7 mph W | 0% |
| Tuesday | 65°F | Sunny | 6 to 9 mph W | 0% |
| Tuesday Night | 38°F | Mostly Clear | 2 to 6 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for McKnightstown (39.873, -77.330). Updated through the day.
Growing snapshot for McKnightstown
Last spring frost
Apr 28
First fall frost
Oct 17
Growing season
170 days
Hardiness zone
7a
More local growing data for McKnightstown: nearby ZIP 17343 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
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Fairfield
Gettysburg
Hampton
Heidlersburg
Hunterstown
Lake Heritage
Lake Meade
Littlestown
McSherrystown
Midway
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Orrtanna
Table Rock
York Springs
Climate data from the nearest NOAA station, Cashtown 1S, Pa (1.4 mi from McKnightstown). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.