Collinsburg, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Collinsburg, a community in Westmoreland County, Pennsylvania.
Today
86°F
Patchy Fog then Sunny
Patchy fog before 9am. Sunny, with a high near 86. East wind 1 to 5 mph.
7-day forecast for Collinsburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Patchy Fog then Sunny | 1 to 5 mph E | 0% |
| Tonight | 67°F | Partly Cloudy | 5 mph SE | 1% |
| Wednesday | 87°F | Mostly Sunny then Isolated Showers And Thunderstorms | 2 to 6 mph S | 17% |
| Wednesday Night | 68°F | Scattered Showers And Thunderstorms | 5 mph S | 48% |
| Thursday | 86°F | Showers And Thunderstorms | 3 to 9 mph SW | 76% |
| Thursday Night | 68°F | Showers And Thunderstorms | 3 to 7 mph SW | 76% |
| Friday | 85°F | Showers And Thunderstorms | 3 to 9 mph SW | 82% |
| Friday Night | 67°F | Showers And Thunderstorms | 7 mph SW | 82% |
| Saturday | 84°F | Showers And Thunderstorms Likely | 9 mph SW | 58% |
| Saturday Night | 67°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 to 8 mph SW | 58% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms | 6 to 10 mph SW | 24% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms | 9 mph SW | 24% |
| Monday | 87°F | Chance Showers And Thunderstorms | 9 to 14 mph SW | 39% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 7 to 10 mph SW | 49% |
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 Aug 4, 2026.