Williamsburg, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Williamsburg, a borough in Blair County, Pennsylvania.
Tonight
52°F
Partly Cloudy then Patchy Fog
Patchy fog after midnight. Partly cloudy, with a low around 52. Northeast wind around 3 mph.
7-day forecast for Williamsburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Partly Cloudy then Patchy Fog | 3 mph NE | 0% |
| Saturday | 75°F | Patchy Fog then Partly Sunny | 5 mph E | 3% |
| Saturday Night | 63°F | Chance Rain Showers | 6 mph SE | 53% |
| Sunday | 77°F | Rain Showers | 6 mph SW | 96% |
| Sunday Night | 56°F | Showers And Thunderstorms | 2 to 7 mph NW | 96% |
| Monday | 68°F | Chance Rain Showers | 7 mph NE | 33% |
| Monday Night | 53°F | Rain Showers Likely | 7 mph E | 66% |
| Tuesday | 62°F | Showers And Thunderstorms Likely | 7 mph E | 71% |
| Tuesday Night | 49°F | Rain Showers Likely | 8 mph E | 66% |
| Wednesday | 59°F | Rain Showers Likely | 8 mph E | 60% |
| Wednesday Night | 49°F | Showers And Thunderstorms Likely | 6 mph E | 56% |
| Thursday | 62°F | Chance Showers And Thunderstorms | 5 mph NE | 51% |
| Thursday Night | 50°F | Chance Rain Showers | 3 mph NE | 36% |
| Friday | 69°F | Slight Chance Rain Showers then Partly Sunny | 1 to 6 mph N | 21% |
Forecast source: National Weather Service (api.weather.gov) for Williamsburg (40.463, -78.205). Updated through the day.
Growing snapshot for Williamsburg
Last spring frost
Apr 19
First fall frost
Oct 28
Growing season
191 days
Hardiness zone
6b
More local growing data for Williamsburg: nearby ZIP 16693 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Altoona
Bald Eagle
Bellwood
Birmingham
Brooks Mill
Canan Station
Canoe Creek
Carson Valley
Charlottsville
Clappertown
Claysburg
Cotton Town
Cove Forge
Cross Keys
Culp
Curryville
Dumb Hundred
Duncansville
East Altoona
East Freedom
East Sharpsburg
Elberta
Eldorado
Fisherville
Foot of Ten
Fort Fetter
Fostoria
Franklin Forge
Frankstown
Fredericksburg
Climate data from the nearest NOAA station, Raystown Lake 2, Pa (9.8 mi from Williamsburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.