McKnightstown, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for McKnightstown, a community in Adams County, Pennsylvania.
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. East wind around 3 mph.
7-day forecast for McKnightstown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 3 mph E | 0% |
| Tonight | 69°F | Mostly Cloudy | 0 to 3 mph E | 8% |
| Wednesday | 81°F | Showers And Thunderstorms Likely | 0 to 3 mph E | 69% |
| Wednesday Night | 70°F | Showers And Thunderstorms Likely | 0 to 3 mph SE | 60% |
| Thursday | 88°F | Patchy Fog then Showers And Thunderstorms Likely | 1 to 6 mph S | 55% |
| Thursday Night | 71°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph SW | 55% |
| Friday | 88°F | Partly Sunny then Showers And Thunderstorms Likely | 0 to 5 mph W | 56% |
| Friday Night | 68°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 3 mph W | 56% |
| Saturday | 86°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 43% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 2 mph NW | 43% |
| Sunday | 88°F | Mostly Sunny | 0 to 5 mph NW | 13% |
| Sunday Night | 70°F | Partly Cloudy | 2 mph W | 13% |
| Monday | 89°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 7 mph W | 15% |
| Monday Night | 69°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 1 to 6 mph W | 15% |
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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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 Aug 4, 2026.