Cairnbrook, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cairnbrook, a community in Somerset County, Pennsylvania.
Tonight
48°F
Mostly Clear
Mostly clear, with a low around 48. Southeast wind around 6 mph.
7-day forecast for Cairnbrook
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Mostly Clear | 6 mph SE | 1% |
| Wednesday | 69°F | Partly Sunny | 5 to 12 mph SE | 2% |
| Wednesday Night | 57°F | Rain Showers | 7 to 10 mph S | 98% |
| Thursday | 67°F | Rain Showers Likely | 6 to 10 mph SW | 67% |
| Thursday Night | 49°F | Mostly Cloudy then Slight Chance Rain Showers | 1 to 6 mph W | 22% |
| Friday | 61°F | Chance Rain Showers | 1 to 6 mph W | 28% |
| Friday Night | 43°F | Chance Rain Showers | 5 mph NW | 25% |
| Saturday | 51°F | Chance Rain Showers | 6 to 14 mph W | 31% |
| Saturday Night | 36°F | Chance Rain Showers | 8 to 12 mph W | 29% |
| Sunday | 50°F | Partly Sunny | 9 to 13 mph W | 14% |
| Sunday Night | 34°F | Slight Chance Rain Showers | 10 to 17 mph W | 23% |
| Monday | 50°F | Chance Rain Showers | 18 mph W | 32% |
| Monday Night | 36°F | Chance Rain Showers | 13 to 17 mph W | 32% |
| Tuesday | 54°F | Mostly Sunny | 21 mph W | 14% |
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
Nearby towns & communities
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Somerset
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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 Nov 4, 2026.