West Middlesex, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for West Middlesex, a borough in Mercer County, Pennsylvania.
Overnight
56°F
Mostly Cloudy
Mostly cloudy, with a low around 56. East wind around 3 mph.
7-day forecast for West Middlesex
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Mostly Cloudy | 3 mph E | 1% |
| Saturday | 76°F | Mostly Cloudy | 5 mph E | 6% |
| Saturday Night | 62°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph SE | 69% |
| Sunday | 75°F | Showers And Thunderstorms | 5 to 9 mph SW | 90% |
| Sunday Night | 51°F | Chance Rain Showers then Mostly Cloudy | 6 to 10 mph N | 53% |
| Monday | 68°F | Mostly Cloudy then Slight Chance Rain Showers | 7 to 10 mph NE | 15% |
| Monday Night | 50°F | Chance Rain Showers | 10 mph NE | 48% |
| Tuesday | 63°F | Chance Rain Showers | 12 to 15 mph E | 48% |
| Tuesday Night | 49°F | Rain Showers Likely | 16 mph E | 58% |
| Wednesday | 64°F | Rain Showers Likely | 16 mph E | 58% |
| Wednesday Night | 49°F | Showers And Thunderstorms Likely | 12 to 15 mph E | 62% |
| Thursday | 66°F | Showers And Thunderstorms Likely | 12 mph E | 59% |
| Thursday Night | 48°F | Slight Chance Rain Showers | 5 to 8 mph E | 20% |
| Friday | 70°F | Slight Chance Rain Showers | 5 to 8 mph NE | 18% |
Forecast source: National Weather Service (api.weather.gov) for West Middlesex (41.174, -80.456). Updated through the day.
Growing snapshot for West Middlesex
Last spring frost
Apr 30
First fall frost
Oct 23
Growing season
175 days
Hardiness zone
6a
More local growing data for West Middlesex: nearby ZIP 16159 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Clark
Farrell
Fredonia
Greenville
Grove City
Hermitage
Jackson Center
Lake Latonka
Mercer
New Lebanon
Reynolds Heights
Sandy Lake
Sharon
Sharpsville
Sheakleyville
Stoneboro
Wheatland
Climate data from the nearest NOAA station, New Castle 1 N, Pa (11.1 mi from West Middlesex). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.