Cairnbrook, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cairnbrook, a community in Somerset County, Pennsylvania.
This Afternoon
71°F
Partly Sunny
Partly sunny, with a high near 71. North wind around 7 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Cairnbrook
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Partly Sunny | 7 mph N | 1% |
| Tonight | 53°F | Partly Cloudy | 2 to 6 mph NE | 6% |
| Saturday | 69°F | Partly Sunny | 3 to 7 mph SE | 3% |
| Saturday Night | 59°F | Mostly Cloudy then Chance Rain Showers | 9 mph SE | 43% |
| Sunday | 71°F | Rain Showers | 8 mph SW | 95% |
| Sunday Night | 56°F | Showers And Thunderstorms | 6 mph N | 95% |
| Monday | 62°F | Chance Rain Showers | 7 mph E | 47% |
| Monday Night | 52°F | Rain Showers Likely | 7 to 13 mph E | 74% |
| Tuesday | 56°F | Showers And Thunderstorms | 14 mph E | 78% |
| Tuesday Night | 48°F | Showers And Thunderstorms | 14 to 17 mph E | 75% |
| Wednesday | 54°F | Showers And Thunderstorms Likely | 12 to 15 mph E | 70% |
| Wednesday Night | 47°F | Showers And Thunderstorms Likely | 10 to 15 mph SE | 57% |
| Thursday | 57°F | Chance Showers And Thunderstorms | 10 mph E | 54% |
| Thursday Night | 48°F | Chance Rain Showers | 7 mph E | 35% |
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 Sep 19, 2026.