Collinsburg, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Collinsburg, a community in Westmoreland County, Pennsylvania.
Overnight
51°F
Mostly Clear
Mostly clear, with a low around 51. East wind around 1 mph.
7-day forecast for Collinsburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 51°F | Mostly Clear | 1 mph E | 1% |
| Wednesday | 78°F | Partly Sunny | 1 to 9 mph S | 7% |
| Wednesday Night | 60°F | Light Rain | 10 mph S | 91% |
| Thursday | 70°F | Chance Light Rain then Partly Sunny | 8 to 14 mph SW | 52% |
| Thursday Night | 47°F | Partly Cloudy | 2 to 7 mph SW | 2% |
| Friday | 64°F | Partly Sunny then Slight Chance Light Rain | 2 to 9 mph SW | 20% |
| Friday Night | 40°F | Chance Light Rain | 3 to 8 mph W | 35% |
| Saturday | 53°F | Chance Light Rain | 8 to 14 mph W | 33% |
| Saturday Night | 34°F | Chance Light Rain | 7 to 12 mph W | 28% |
| Sunday | 55°F | Partly Sunny | 7 to 15 mph W | 8% |
| Sunday Night | 31°F | Partly Cloudy | 12 mph SW | 6% |
| Monday | 56°F | Mostly Sunny | 9 to 15 mph W | 11% |
| Monday Night | 32°F | Mostly Clear | 8 to 12 mph SW | 10% |
| Tuesday | 60°F | Mostly Sunny | 12 to 17 mph SW | 4% |
Forecast source: National Weather Service (api.weather.gov) for Collinsburg (40.221, -79.781). Updated through the day.
Growing snapshot for Collinsburg
Last spring frost
Apr 27
First fall frost
Oct 22
Growing season
177 days
More local growing data for Collinsburg: nearby ZIP 15660 weather · frost dates · planting calendar · Pennsylvania frost dates
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Level Green
Climate data from the nearest NOAA station, Donora 1 Sw, Pa (7.7 mi from Collinsburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.