Mount Pleasant, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Pleasant, a borough in Westmoreland County, Pennsylvania.
This Afternoon
76°F
Slight Chance Rain Showers
A slight chance of rain showers. Mostly sunny, with a high near 76. North wind around 8 mph. Chance of precipitation is 20%.
7-day forecast for Mount Pleasant
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Slight Chance Rain Showers | 8 mph N | 19% |
| Tonight | 58°F | Partly Cloudy | 2 to 7 mph NE | 14% |
| Saturday | 79°F | Partly Sunny | 6 mph E | 2% |
| Saturday Night | 65°F | Partly Cloudy then Chance Showers And Thunderstorms | 6 to 10 mph SE | 51% |
| Sunday | 77°F | Showers And Thunderstorms | 7 to 10 mph SW | 95% |
| Sunday Night | 61°F | Showers And Thunderstorms | 5 to 8 mph N | 95% |
| Monday | 71°F | Chance Rain Showers | 10 mph NE | 44% |
| Monday Night | 58°F | Showers And Thunderstorms Likely | 13 mph E | 69% |
| Tuesday | 66°F | Showers And Thunderstorms Likely | 14 to 18 mph E | 74% |
| Tuesday Night | 54°F | Showers And Thunderstorms Likely | 18 mph E | 71% |
| Wednesday | 63°F | Showers And Thunderstorms Likely | 17 mph E | 64% |
| Wednesday Night | 53°F | Chance Showers And Thunderstorms | 12 to 17 mph E | 52% |
| Thursday | 65°F | Chance Rain Showers | 10 mph E | 46% |
| Thursday Night | 53°F | Chance Rain Showers | 3 to 9 mph E | 28% |
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 Sep 18, 2026.