Clark, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Clark, a borough in Mercer County, Pennsylvania.
Today
75°F
Mostly Cloudy
Mostly cloudy, with a high near 75. East wind around 6 mph.
7-day forecast for Clark
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Mostly Cloudy | 6 mph E | 6% |
| Tonight | 62°F | Showers And Thunderstorms Likely | 6 mph SE | 66% |
| Sunday | 73°F | Showers And Thunderstorms | 6 to 10 mph W | 89% |
| Sunday Night | 50°F | Chance Rain Showers then Mostly Cloudy | 7 to 12 mph NE | 53% |
| Monday | 67°F | Mostly Cloudy | 10 mph NE | 12% |
| Monday Night | 49°F | Chance Rain Showers | 12 mph NE | 47% |
| Tuesday | 62°F | Chance Rain Showers | 12 to 15 mph E | 47% |
| Tuesday Night | 49°F | Rain Showers Likely | 16 mph E | 57% |
| Wednesday | 62°F | Rain Showers Likely | 14 to 17 mph E | 57% |
| Wednesday Night | 49°F | Showers And Thunderstorms Likely | 12 to 15 mph E | 63% |
| Thursday | 65°F | Showers And Thunderstorms Likely | 12 mph E | 60% |
| Thursday Night | 49°F | Slight Chance Rain Showers | 5 to 8 mph E | 19% |
| Friday | 69°F | Slight Chance Rain Showers | 6 to 9 mph NE | 19% |
| Friday Night | 48°F | Partly Cloudy | 3 to 9 mph NE | 12% |
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 Sep 19, 2026.