Grantley, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grantley, a community in York County, Pennsylvania.
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. East wind around 5 mph.
7-day forecast for Grantley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 5 mph E | 0% |
| Tonight | 68°F | Mostly Cloudy | 3 mph SE | 9% |
| Wednesday | 83°F | Showers And Thunderstorms Likely | 1 to 5 mph E | 68% |
| Wednesday Night | 71°F | Showers And Thunderstorms Likely | 2 to 6 mph S | 70% |
| Thursday | 89°F | Partly Sunny then Showers And Thunderstorms Likely | 3 to 8 mph S | 57% |
| Thursday Night | 72°F | Showers And Thunderstorms Likely | 2 to 7 mph SW | 57% |
| Friday | 89°F | Mostly Sunny then Showers And Thunderstorms Likely | 1 to 6 mph SW | 58% |
| Friday Night | 70°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 1 to 5 mph SW | 58% |
| Saturday | 88°F | Partly Sunny then Chance Showers And Thunderstorms | 1 to 6 mph W | 49% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 1 to 5 mph SW | 49% |
| Sunday | 89°F | Mostly Sunny | 1 to 6 mph W | 14% |
| Sunday Night | 71°F | Partly Cloudy | 5 mph SW | 14% |
| Monday | 92°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 9 mph W | 19% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms | 3 to 8 mph SW | 19% |
Forecast source: National Weather Service (api.weather.gov) for Grantley (39.940, -76.731). Updated through the day.
Growing snapshot for Grantley
Last spring frost
Apr 26
First fall frost
Oct 19
Growing season
177 days
Hardiness zone
7a
More local growing data for Grantley: nearby ZIP 17401 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Cross Roads
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Delta
Dillsburg
Dover
East Prospect
East York
Emigsville
Fawn Grove
Felton
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Goldsboro
Hallam
Hanover
Jacobus
Jefferson
Lewisberry
Loganville
Manchester
Mount Royal
Mount Wolf
New Freedom
New Market
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North York
Parkville
Pennville
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Queens Gate
Climate data from the nearest NOAA station, York 3 Ssw Pump Stn, Pa (3 mi from Grantley). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.