Mount Pleasant, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Pleasant, a borough in Westmoreland County, Pennsylvania.
Overnight
52°F
Mostly Clear
Mostly clear, with a low around 52. South wind 0 to 3 mph.
7-day forecast for Mount Pleasant
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Mostly Clear | 0 to 3 mph S | 1% |
| Wednesday | 78°F | Partly Sunny | 2 to 8 mph S | 2% |
| Wednesday Night | 60°F | Light Rain | 9 mph S | 90% |
| Thursday | 69°F | Chance Light Rain then Partly Sunny | 8 to 15 mph SW | 53% |
| Thursday Night | 49°F | Partly Cloudy | 2 to 6 mph SW | 3% |
| Friday | 63°F | Partly Sunny then Slight Chance Light Rain | 3 to 8 mph SW | 20% |
| Friday Night | 41°F | Chance Light Rain | 2 to 7 mph W | 47% |
| Saturday | 52°F | Chance Light Rain | 8 to 14 mph W | 47% |
| Saturday Night | 36°F | Chance Light Rain | 6 to 12 mph W | 33% |
| Sunday | 54°F | Slight Chance Light Rain then Partly Sunny | 7 to 16 mph W | 15% |
| Sunday Night | 33°F | Partly Cloudy | 7 to 12 mph SW | 8% |
| Monday | 54°F | Mostly Sunny | 9 to 16 mph W | 14% |
| Monday Night | 34°F | Mostly Clear | 7 to 12 mph SW | 14% |
| Tuesday | 59°F | Sunny | 13 to 20 mph SW | 5% |
Forecast source: National Weather Service (api.weather.gov) for Mount Pleasant (40.151, -79.543). Updated through the day.
Growing snapshot for Mount Pleasant
Last spring frost
May 1
First fall frost
Oct 13
Growing season
164 days
Hardiness zone
6b
More local growing data for Mount Pleasant: nearby ZIP 15666 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Mt Pleasant, Pa (3.8 mi from Mount Pleasant). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.