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Mount Union, PA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Mount Union, a borough in Huntingdon County, Pennsylvania.

Tonight
64°F
Rain Showers Likely
Rain showers likely. Mostly cloudy, with a low around 64. East wind 1 to 7 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.

7-day forecast for Mount Union

WhenTempForecastWindPrecip
Tonight 64°F Rain Showers Likely 1 to 7 mph E 57%
Sunday 80°F Rain Showers 2 to 6 mph SW 97%
Sunday Night 55°F Showers And Thunderstorms then Mostly Cloudy 5 mph NW 89%
Monday 72°F Partly Sunny then Chance Rain Showers 5 mph NE 32%
Monday Night 54°F Rain Showers Likely 5 mph NE 65%
Tuesday 64°F Rain Showers Likely 6 mph E 70%
Tuesday Night 51°F Rain Showers Likely 6 mph E 58%
Wednesday 60°F Chance Rain Showers 6 mph E 54%
Wednesday Night 49°F Chance Rain Showers 6 mph E 36%
Thursday 62°F Chance Rain Showers 6 mph NE 29%
Thursday Night 49°F Slight Chance Rain Showers 3 mph NE 24%
Friday 69°F Chance Rain Showers 5 mph N 26%
Friday Night 49°F Chance Rain Showers 5 mph N 26%
Saturday 72°F Slight Chance Rain Showers 5 mph N 17%

Forecast source: National Weather Service (api.weather.gov) for Mount Union (40.384, -77.882). Updated through the day.

Growing snapshot for Mount Union

Last spring frost
Apr 19
First fall frost
Oct 28
Growing season
191 days
Hardiness zone
7a

More local growing data for Mount Union: nearby ZIP 17066 weather · frost dates · planting calendar · Pennsylvania frost dates

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Climate data from the nearest NOAA station, Raystown Lake 2, Pa (11.7 mi from Mount Union). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.