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
73°F
Partly Sunny then Light Rain Likely
Rain likely after 1pm. Partly sunny, with a high near 73. South wind 6 to 12 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for West Middlesex
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Partly Sunny then Light Rain Likely | 6 to 12 mph S | 62% |
| Tonight | 57°F | Light Rain | 7 to 13 mph S | 97% |
| Thursday | 67°F | Partly Sunny | 6 to 13 mph SW | 5% |
| Thursday Night | 44°F | Partly Cloudy | 2 to 6 mph SW | 0% |
| Friday | 61°F | Chance Light Rain | 2 to 7 mph SW | 40% |
| Friday Night | 38°F | Chance Light Rain | 2 to 6 mph W | 52% |
| Saturday | 53°F | Chance Light Rain | 7 to 12 mph W | 51% |
| Saturday Night | 32°F | Chance Light Rain | 5 to 8 mph W | 38% |
| Sunday | 54°F | Partly Sunny | 5 to 12 mph W | 8% |
| Sunday Night | 31°F | Partly Cloudy | 7 mph W | 9% |
| Monday | 56°F | Slight Chance Light Rain | 5 to 10 mph W | 18% |
| Monday Night | 32°F | Partly Cloudy | 6 mph SW | 14% |
| Tuesday | 60°F | Mostly Sunny | 7 to 12 mph SW | 6% |
| Tuesday Night | 31°F | Partly Cloudy | 2 to 6 mph W | 6% |
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 Nov 4, 2026.