Williamsburg, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Williamsburg, a borough in Blair County, Pennsylvania.
Tonight
47°F
Mostly Clear then Areas Of Fog
Areas of fog after 1am. Mostly clear, with a low around 47. East wind 0 to 3 mph.
7-day forecast for Williamsburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Mostly Clear then Areas Of Fog | 0 to 3 mph E | 1% |
| Wednesday | 76°F | Areas Of Fog then Mostly Sunny | 0 to 8 mph SE | 2% |
| Wednesday Night | 60°F | Mostly Cloudy then Rain Showers | 7 mph SE | 96% |
| Thursday | 75°F | Rain Showers Likely | 3 to 7 mph SW | 66% |
| Thursday Night | 50°F | Mostly Cloudy then Slight Chance Rain Showers | 0 to 3 mph W | 20% |
| Friday | 70°F | Chance Rain Showers | 2 mph NW | 38% |
| Friday Night | 43°F | Slight Chance Rain Showers | 2 mph NW | 22% |
| Saturday | 61°F | Slight Chance Rain Showers | 2 to 9 mph NW | 21% |
| Saturday Night | 36°F | Slight Chance Rain Showers then Partly Cloudy | 2 to 6 mph W | 21% |
| Sunday | 59°F | Mostly Sunny | 3 to 8 mph W | 8% |
| Sunday Night | 35°F | Partly Cloudy then Slight Chance Rain Showers | 7 mph W | 16% |
| Monday | 59°F | Chance Rain Showers | 7 to 12 mph W | 25% |
| Monday Night | 35°F | Slight Chance Rain Showers then Partly Cloudy | 7 mph W | 23% |
| Tuesday | 63°F | Mostly Sunny | 6 to 13 mph W | 7% |
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 Nov 4, 2026.