Union City, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Union City, a borough in Erie County, Pennsylvania.
Today
82°F
Patchy Fog then Sunny
Patchy fog before 8am. Sunny, with a high near 82. South wind 0 to 3 mph.
7-day forecast for Union City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Patchy Fog then Sunny | 0 to 3 mph S | 0% |
| Tonight | 60°F | Mostly Clear | 3 mph SE | 0% |
| Wednesday | 85°F | Mostly Sunny then Chance Showers And Thunderstorms | 6 mph S | 51% |
| Wednesday Night | 64°F | Chance Showers And Thunderstorms | 1 to 5 mph S | 48% |
| Thursday | 84°F | Showers And Thunderstorms Likely | 3 to 7 mph SW | 63% |
| Thursday Night | 64°F | Showers And Thunderstorms Likely | 1 to 5 mph SW | 63% |
| Friday | 81°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 2 to 6 mph SW | 74% |
| Friday Night | 62°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 1 to 5 mph SW | 74% |
| Saturday | 82°F | Chance Showers And Thunderstorms | 2 to 7 mph SW | 47% |
| Saturday Night | 63°F | Chance Showers And Thunderstorms | 1 to 5 mph SW | 47% |
| Sunday | 85°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 3 to 9 mph SW | 23% |
| Sunday Night | 65°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 8 mph SW | 44% |
| Monday | 83°F | Chance Rain Showers | 6 to 10 mph SW | 49% |
| Monday Night | 62°F | Chance Showers And Thunderstorms | 2 to 8 mph SW | 51% |
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 Aug 4, 2026.