Union City, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Union City, a borough in Erie County, Pennsylvania.
Overnight
51°F
Mostly Cloudy
Mostly cloudy, with a low around 51. East wind around 3 mph.
7-day forecast for Union City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 51°F | Mostly Cloudy | 3 mph E | 1% |
| Saturday | 72°F | Mostly Cloudy | 5 mph SE | 9% |
| Saturday Night | 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% |
Forecast source: National Weather Service (api.weather.gov) for Union City (41.898, -79.843). Updated through the day.
Growing snapshot for Union City
Last spring frost
May 7
First fall frost
Oct 10
Growing season
155 days
Hardiness zone
6a
More local growing data for Union City: nearby ZIP 16438 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Albion
Avonia
Canadohta Lake
Corry
Cranesville
Edinboro
Elgin
Erie
Fairview
Girard
Lake City
Lawrence Park
McKean
Mill Village
North East
Northwest Harborcreek
Penn State Erie (Behrend)
Platea
Waterford
Wattsburg
Wesleyville
Climate data from the nearest NOAA station, Union City Filtration Plant, Pa (0.9 mi from Union City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.