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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
53°F
Mostly Clear then Patchy Fog
Patchy fog after midnight. Mostly clear, with a low around 53. Northwest wind around 3 mph.

7-day forecast for Mount Union

WhenTempForecastWindPrecip
Tonight 53°F Mostly Clear then Patchy Fog 3 mph NW 0%
Saturday 76°F Patchy Fog then Mostly Sunny 2 mph E 3%
Saturday Night 63°F Chance Rain Showers 1 to 6 mph SE 47%
Sunday 78°F Rain Showers 2 to 6 mph SW 95%
Sunday Night 57°F Showers And Thunderstorms 1 to 6 mph NW 95%
Monday 70°F Chance Rain Showers 6 mph NE 32%
Monday Night 55°F Rain Showers Likely 6 mph NE 66%
Tuesday 63°F Rain Showers Likely 6 mph E 71%
Tuesday Night 50°F Rain Showers Likely 6 mph E 66%
Wednesday 61°F Rain Showers Likely 6 mph E 57%
Wednesday Night 50°F Chance Showers And Thunderstorms 5 mph NE 54%
Thursday 64°F Chance Showers And Thunderstorms 3 mph NE 51%
Thursday Night 51°F Chance Rain Showers 2 mph N 38%
Friday 71°F Slight Chance Rain Showers then Partly Sunny 3 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 19, 2026.