Cairnbrook, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cairnbrook, a community in Somerset County, Pennsylvania.
Today
78°F
Mostly Sunny
Mostly sunny, with a high near 78. Southeast wind around 6 mph.
7-day forecast for Cairnbrook
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Mostly Sunny | 6 mph SE | 0% |
| Tonight | 63°F | Partly Cloudy | 2 to 7 mph SE | 6% |
| Wednesday | 77°F | Mostly Cloudy then Chance Showers And Thunderstorms | 2 to 6 mph SE | 30% |
| Wednesday Night | 65°F | Chance Showers And Thunderstorms | 5 mph S | 49% |
| Thursday | 79°F | Showers And Thunderstorms | 2 to 7 mph SW | 86% |
| Thursday Night | 67°F | Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 3 mph SW | 86% |
| Friday | 80°F | Showers And Thunderstorms | 2 to 7 mph SW | 82% |
| Friday Night | 63°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph SW | 82% |
| Saturday | 78°F | Chance Showers And Thunderstorms | 5 to 8 mph W | 47% |
| Saturday Night | 63°F | Chance Showers And Thunderstorms | 6 mph W | 47% |
| Sunday | 79°F | Slight Chance Showers And Thunderstorms | 5 to 8 mph W | 21% |
| Sunday Night | 65°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 to 8 mph W | 21% |
| Monday | 80°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 8 to 12 mph W | 24% |
| Monday Night | 65°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 7 to 10 mph W | 34% |
Forecast source: National Weather Service (api.weather.gov) for Cairnbrook (40.125, -78.819). Updated through the day.
Growing snapshot for Cairnbrook
Last spring frost
May 4
First fall frost
Oct 10
Growing season
158 days
Hardiness zone
6a
More local growing data for Cairnbrook: nearby ZIP 15924 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Shawnee Sp, Pa (8.2 mi from Cairnbrook). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.