Donegal, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Donegal, a borough in Westmoreland County, Pennsylvania.
This Afternoon
75°F
Sunny
Sunny. High near 75, with temperatures falling to around 68 in the afternoon. South wind 1 to 9 mph.
7-day forecast for Donegal
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Sunny | 1 to 9 mph S | 1% |
| Tonight | 51°F | Mostly Clear | 2 to 7 mph S | 2% |
| Wednesday | 76°F | Partly Sunny | 2 to 7 mph SE | 3% |
| Wednesday Night | 59°F | Light Rain | 8 mph S | 99% |
| Thursday | 69°F | Light Rain Likely | 6 to 12 mph SW | 64% |
| Thursday Night | 50°F | Mostly Cloudy then Slight Chance Light Rain | 0 to 5 mph SW | 16% |
| Friday | 64°F | Chance Light Rain | 0 to 6 mph W | 25% |
| Friday Night | 43°F | Chance Light Rain | 0 to 3 mph NW | 40% |
| Saturday | 53°F | Chance Light Rain | 3 to 10 mph W | 40% |
| Saturday Night | 36°F | Chance Light Rain | 2 to 7 mph W | 39% |
| Sunday | 53°F | Slight Chance Light Rain | 3 to 10 mph SW | 24% |
| Sunday Night | 35°F | Chance Light Rain | 9 mph W | 29% |
| Monday | 53°F | Chance Light Rain | 9 to 16 mph W | 39% |
| Monday Night | 36°F | Chance Light Rain | 8 to 12 mph SW | 39% |
Forecast source: National Weather Service (api.weather.gov) for Donegal (40.112, -79.381). Updated through the day.
Growing snapshot for Donegal
Last spring frost
Apr 30
First fall frost
Oct 17
Growing season
170 days
Hardiness zone
6a
More local growing data for Donegal: nearby ZIP 15628 weather · frost dates · planting calendar · Pennsylvania frost dates
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Level Green
Climate data from the nearest NOAA station, Donegal 2 Nw, Pa (2.7 mi from Donegal). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.