McDonald, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for McDonald, a borough in Washington County, Pennsylvania.
Overnight
55°F
Mostly Clear
Mostly clear, with a low around 55. South wind around 9 mph.
7-day forecast for McDonald
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Mostly Clear | 9 mph S | 1% |
| Wednesday | 76°F | Mostly Cloudy then Chance Light Rain | 6 to 12 mph S | 38% |
| Wednesday Night | 60°F | Light Rain | 10 to 15 mph S | 94% |
| Thursday | 67°F | Partly Sunny | 8 to 14 mph SW | 11% |
| Thursday Night | 48°F | Partly Cloudy | 3 to 7 mph SW | 1% |
| Friday | 61°F | Partly Sunny then Slight Chance Light Rain | 3 to 9 mph SW | 20% |
| Friday Night | 42°F | Chance Light Rain | 6 to 9 mph W | 30% |
| Saturday | 51°F | Chance Light Rain | 13 mph W | 30% |
| Saturday Night | 37°F | Chance Light Rain | 7 to 10 mph W | 25% |
| Sunday | 54°F | Partly Sunny | 7 to 14 mph W | 6% |
| Sunday Night | 35°F | Partly Cloudy | 10 mph W | 5% |
| Monday | 55°F | Mostly Sunny | 8 to 13 mph W | 9% |
| Monday Night | 36°F | Mostly Clear | 7 to 12 mph SW | 7% |
| Tuesday | 59°F | Mostly Sunny | 12 to 15 mph SW | 3% |
Forecast source: National Weather Service (api.weather.gov) for McDonald (40.370, -80.233). Updated through the day.
Growing snapshot for McDonald
Last spring frost
Apr 23
First fall frost
Oct 23
Growing season
181 days
Hardiness zone
6b
More local growing data for McDonald: nearby ZIP 15057 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Pittsburgh Intl Ap, Pa (9 mi from McDonald). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.