Hallam, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hallam, a borough in York County, Pennsylvania.
Today
86°F
Mostly Sunny
Mostly sunny, with a high near 86. Northeast wind around 5 mph.
7-day forecast for Hallam
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Mostly Sunny | 5 mph NE | 0% |
| Tonight | 67°F | Mostly Cloudy | 1 to 5 mph SE | 7% |
| Wednesday | 85°F | Showers And Thunderstorms Likely | 2 to 6 mph E | 70% |
| Wednesday Night | 71°F | Showers And Thunderstorms Likely | 3 to 7 mph S | 69% |
| Thursday | 90°F | Partly Sunny then Showers And Thunderstorms Likely | 5 to 9 mph S | 61% |
| Thursday Night | 71°F | Showers And Thunderstorms Likely | 2 to 8 mph SW | 61% |
| Friday | 90°F | Mostly Sunny then Showers And Thunderstorms Likely | 2 to 7 mph SW | 63% |
| Friday Night | 70°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 1 to 6 mph SW | 63% |
| Saturday | 88°F | Partly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph W | 49% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 49% |
| Sunday | 89°F | Mostly Sunny | 2 to 6 mph W | 14% |
| Sunday Night | 71°F | Partly Cloudy | 2 to 6 mph SW | 14% |
| Monday | 91°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 9 mph W | 20% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms | 5 to 8 mph W | 20% |
Forecast source: National Weather Service (api.weather.gov) for Hallam (40.002, -76.604). Updated through the day.
Growing snapshot for Hallam
Last spring frost
Apr 26
First fall frost
Oct 19
Growing season
177 days
Hardiness zone
7a
More local growing data for Hallam: nearby ZIP 17406 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Cross Roads
Dallastown
Delta
Dillsburg
Dover
East Prospect
East York
Emigsville
Fawn Grove
Felton
Franklintown
Glen Rock
Goldsboro
Grantley
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 (8.9 mi from Hallam). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.