Collinsburg, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Collinsburg, a community in Westmoreland County, Pennsylvania.
Today
76°F
Partly Sunny
Partly sunny, with a high near 76. South wind 5 to 8 mph.
7-day forecast for Collinsburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Partly Sunny | 5 to 8 mph S | 11% |
| Tonight | 61°F | Light Rain | 10 mph S | 87% |
| Thursday | 70°F | Chance Light Rain then Partly Sunny | 8 to 15 mph SW | 36% |
| Thursday Night | 47°F | Partly Cloudy | 3 to 7 mph SW | 0% |
| Friday | 64°F | Slight Chance Light Rain | 5 to 10 mph SW | 18% |
| Friday Night | 38°F | Chance Light Rain | 5 to 8 mph W | 31% |
| Saturday | 52°F | Chance Light Rain | 8 to 15 mph W | 25% |
| Saturday Night | 34°F | Chance Light Rain then Mostly Cloudy | 7 to 13 mph W | 25% |
| Sunday | 56°F | Mostly Sunny | 8 to 15 mph W | 3% |
| Sunday Night | 32°F | Partly Cloudy | 8 to 13 mph W | 2% |
| Monday | 59°F | Mostly Sunny | 9 to 16 mph W | 3% |
| Monday Night | 33°F | Mostly Clear | 8 to 12 mph SW | 3% |
| Tuesday | 63°F | Sunny | 10 to 16 mph SW | 0% |
| Tuesday Night | 33°F | Partly Cloudy | 3 to 9 mph SW | 1% |
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.