Union City, PA Weather & Growing Conditions
Today
72°F
Mostly Cloudy
Mostly cloudy, with a high near 72. Southeast wind around 5 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Mostly Cloudy | 5 mph SE | 9% |
| Tonight | 57°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms | 6 mph SE | 84% |
| Sunday | 69°F | Showers And Thunderstorms | 3 to 9 mph W | 83% |
| Sunday Night | 45°F | Chance Rain Showers then Mostly Cloudy | 5 to 8 mph NE | 27% |
| Monday | 64°F | Mostly Cloudy | 10 mph NE | 2% |
| Monday Night | 44°F | Chance Rain Showers | 9 mph E | 37% |
| Tuesday | 62°F | Chance Rain Showers | 12 mph E | 37% |
| Tuesday Night | 44°F | Chance Rain Showers | 9 to 13 mph E | 54% |
| Wednesday | 60°F | Chance Rain Showers | 14 mph SE | 54% |
| Wednesday Night | 44°F | Chance Showers And Thunderstorms | 8 to 14 mph SE | 49% |
| Thursday | 64°F | Chance Showers And Thunderstorms | 9 mph E | 48% |
| Thursday Night | 45°F | Chance Rain Showers | 2 to 7 mph E | 25% |
| Friday | 67°F | Slight Chance Rain Showers | 3 to 9 mph NE | 18% |
| Friday Night | 44°F | Slight Chance Rain Showers then Partly Cloudy | 2 to 8 mph NE | 15% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Union City, PA
Last spring frost
May 7
First fall frost
Oct 10
Growing season
155 days
Hardiness zone
6a
Explore more for Union City, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Union City Filtration Plant, Pa (0.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.