Donegal, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Donegal, a borough in Westmoreland County, Pennsylvania.
Today
84°F
Patchy Fog then Sunny
Patchy fog before 9am. Sunny, with a high near 84. Southeast wind 0 to 3 mph.
7-day forecast for Donegal
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Patchy Fog then Sunny | 0 to 3 mph SE | 0% |
| Tonight | 64°F | Partly Cloudy | 2 to 6 mph SE | 1% |
| Wednesday | 83°F | Patchy Fog then Scattered Showers And Thunderstorms | 5 mph SE | 32% |
| Wednesday Night | 66°F | Scattered Showers And Thunderstorms | 3 mph SE | 45% |
| Thursday | 83°F | Showers And Thunderstorms | 2 to 7 mph SW | 80% |
| Thursday Night | 65°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph SW | 80% |
| Friday | 82°F | Showers And Thunderstorms | 2 to 7 mph SW | 83% |
| Friday Night | 64°F | Showers And Thunderstorms | 5 mph SW | 83% |
| Saturday | 81°F | Showers And Thunderstorms Likely | 5 to 8 mph SW | 58% |
| Saturday Night | 64°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 2 to 6 mph SW | 58% |
| Sunday | 83°F | Chance Showers And Thunderstorms | 3 to 8 mph SW | 25% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms | 3 to 7 mph SW | 25% |
| Monday | 84°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 7 to 12 mph SW | 42% |
| Monday Night | 65°F | Chance Showers And Thunderstorms | 5 to 8 mph SW | 49% |
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 Aug 4, 2026.