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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
Nearby towns & communities
Alexandria
Allenport
Allensville
Beavertown
Broad Top City
Burnt Cabins
Cassville
Cedar Crest
Coalmont
Dudley
Huntingdon
Kistler
Mapleton
Marklesburg
McConnellstown
Mill Creek
Orbisonia
Petersburg
Robertsdale
Rockhill
Saltillo
Shade Gap
Shirleysburg
Three Springs
Wood
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.