Grantley, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grantley, a community in York County, Pennsylvania.
This Afternoon
72°F
Mostly Sunny
Mostly sunny, with a high near 72. South wind around 6 mph.
7-day forecast for Grantley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Mostly Sunny | 6 mph S | 2% |
| Tonight | 52°F | Mostly Clear | 5 mph S | 2% |
| Wednesday | 75°F | Mostly Sunny | 2 to 10 mph S | 2% |
| Wednesday Night | 61°F | Mostly Cloudy then Rain Showers Likely | 10 mph S | 56% |
| Thursday | 74°F | Rain Showers | 7 to 12 mph S | 79% |
| Thursday Night | 60°F | Rain Showers Likely | 1 to 6 mph SW | 66% |
| Friday | 70°F | Rain Showers Likely | 3 mph NW | 66% |
| Friday Night | 49°F | Chance Rain Showers | 5 mph NW | 54% |
| Saturday | 64°F | Slight Chance Rain Showers | 5 to 10 mph NW | 16% |
| Saturday Night | 41°F | Slight Chance Rain Showers then Partly Cloudy | 6 to 9 mph NW | 16% |
| Sunday | 61°F | Mostly Sunny | 5 to 9 mph W | 8% |
| Sunday Night | 39°F | Slight Chance Rain Showers | 8 mph W | 22% |
| Monday | 60°F | Slight Chance Rain Showers | 8 to 15 mph NW | 22% |
| Monday Night | 39°F | Slight Chance Rain Showers | 6 to 10 mph W | 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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Dillsburg
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Hallam
Hanover
Jacobus
Jefferson
Lewisberry
Loganville
Manchester
Mount Royal
Mount Wolf
New Freedom
New Market
New Salem
North York
Parkville
Pennville
Pleasureville
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 Nov 4, 2026.