West Middlesex, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for West Middlesex, a borough in Mercer County, Pennsylvania.
Today
86°F
Sunny
Sunny, with a high near 86. Southeast wind around 3 mph.
7-day forecast for West Middlesex
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Sunny | 3 mph SE | 0% |
| Tonight | 64°F | Mostly Clear | 3 mph SE | 0% |
| Wednesday | 88°F | Partly Sunny then Scattered Showers And Thunderstorms | 5 mph S | 50% |
| Wednesday Night | 67°F | Scattered Showers And Thunderstorms | 0 to 3 mph S | 50% |
| Thursday | 87°F | Chance Rain Showers then Chance Showers And Thunderstorms | 2 to 7 mph SW | 49% |
| Thursday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 1 to 5 mph S | 59% |
| Friday | 85°F | Showers And Thunderstorms | 2 to 7 mph SW | 80% |
| Friday Night | 65°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph SW | 80% |
| Saturday | 85°F | Chance Showers And Thunderstorms | 3 to 7 mph SW | 37% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 37% |
| Sunday | 88°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 3 to 9 mph SW | 22% |
| Sunday Night | 68°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 8 mph SW | 28% |
| Monday | 88°F | Chance Rain Showers | 6 to 10 mph SW | 41% |
| Monday Night | 66°F | Chance Showers And Thunderstorms | 3 to 8 mph SW | 50% |
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 Aug 4, 2026.