Winterstown, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winterstown, a borough in York County, Pennsylvania.
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. East wind 1 to 6 mph.
7-day forecast for Winterstown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 1 to 6 mph E | 0% |
| Tonight | 65°F | Mostly Cloudy then Patchy Fog | 5 mph SE | 14% |
| Wednesday | 82°F | Showers And Thunderstorms | 2 to 7 mph SE | 75% |
| Wednesday Night | 69°F | Showers And Thunderstorms Likely | 3 to 7 mph S | 66% |
| Thursday | 88°F | Mostly Sunny then Showers And Thunderstorms Likely | 5 to 9 mph S | 57% |
| Thursday Night | 70°F | Showers And Thunderstorms Likely | 3 to 8 mph SW | 57% |
| Friday | 88°F | Mostly Sunny then Showers And Thunderstorms Likely | 3 to 7 mph SW | 59% |
| Friday Night | 68°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 2 to 6 mph SW | 59% |
| Saturday | 86°F | Partly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph W | 49% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 49% |
| Sunday | 87°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 7 mph W | 15% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SW | 15% |
| Monday | 89°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 9 mph W | 21% |
| Monday Night | 69°F | Slight Chance Showers And Thunderstorms | 5 to 8 mph W | 21% |
Forecast source: National Weather Service (api.weather.gov) for Winterstown (39.841, -76.617). Updated through the day.
Growing snapshot for Winterstown
Last spring frost
Apr 26
First fall frost
Oct 19
Growing season
177 days
Hardiness zone
7a
More local growing data for Winterstown: nearby ZIP 17313 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, York 3 Ssw Pump Stn, Pa (5.4 mi from Winterstown). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.