Clark, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Clark, a borough in Mercer County, Pennsylvania.
Today
84°F
Areas Of Fog then Sunny
Areas of fog before 9am. Sunny, with a high near 84. Southeast wind 0 to 3 mph.
7-day forecast for Clark
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Areas Of Fog then Sunny | 0 to 3 mph SE | 0% |
| Tonight | 64°F | Mostly Clear | 3 mph SE | 0% |
| Wednesday | 87°F | Mostly Sunny then Scattered Showers And Thunderstorms | 6 mph S | 50% |
| Wednesday Night | 67°F | Scattered Showers And Thunderstorms | 3 mph S | 50% |
| Thursday | 86°F | Chance Rain Showers then Chance Showers And Thunderstorms | 3 to 7 mph SW | 48% |
| Thursday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph S | 59% |
| Friday | 84°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 | 84°F | Chance Showers And Thunderstorms | 3 to 7 mph SW | 39% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 39% |
| Sunday | 87°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 | 31% |
| Monday | 86°F | Chance Rain Showers | 6 to 10 mph SW | 43% |
| Monday Night | 66°F | Chance Showers And Thunderstorms | 3 to 8 mph SW | 51% |
Forecast source: National Weather Service (api.weather.gov) for Clark (41.288, -80.405). Updated through the day.
Growing snapshot for Clark
Last spring frost
May 15
First fall frost
Oct 3
Growing season
140 days
Hardiness zone
6a
More local growing data for Clark: nearby ZIP 16113 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Farrell
Fredonia
Greenville
Grove City
Hermitage
Jackson Center
Lake Latonka
Mercer
New Lebanon
Reynolds Heights
Sandy Lake
Sharon
Sharpsville
Sheakleyville
Stoneboro
West Middlesex
Wheatland
Climate data from the nearest NOAA station, Mercer, Pa (10.6 mi from Clark). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.