McKnightstown, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for McKnightstown, a community in Adams County, Pennsylvania.
Today
74°F
Mostly Sunny
Mostly sunny, with a high near 74. South wind 3 to 10 mph.
7-day forecast for McKnightstown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Mostly Sunny | 3 to 10 mph S | 1% |
| Tonight | 60°F | Mostly Cloudy then Light Rain | 6 to 9 mph S | 82% |
| Thursday | 74°F | Light Rain | 3 to 10 mph S | 78% |
| Thursday Night | 57°F | Chance Light Rain | 0 to 3 mph W | 48% |
| Friday | 69°F | Slight Chance Light Rain | 2 mph NW | 21% |
| Friday Night | 46°F | Slight Chance Light Rain then Partly Cloudy | 0 to 3 mph NW | 18% |
| Saturday | 60°F | Mostly Sunny | 3 to 12 mph W | 13% |
| Saturday Night | 39°F | Partly Cloudy | 6 to 10 mph W | 13% |
| Sunday | 59°F | Mostly Sunny | 9 mph NW | 3% |
| Sunday Night | 37°F | Mostly Clear | 7 mph W | 3% |
| Monday | 59°F | Sunny | 7 to 12 mph W | 4% |
| Monday Night | 35°F | Mostly Clear | 2 to 7 mph W | 3% |
| Tuesday | 63°F | Sunny | 5 to 10 mph W | 2% |
| Tuesday Night | 37°F | Mostly Clear | 2 to 6 mph W | 0% |
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
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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 4, 2026.