Clarks Summit, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Clarks Summit, a borough in Lackawanna County, Pennsylvania.
Tonight
48°F
Partly Cloudy
Partly cloudy, with a low around 48. North wind 5 to 9 mph.
7-day forecast for Clarks Summit
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Partly Cloudy | 5 to 9 mph N | 0% |
| Saturday | 70°F | Mostly Sunny | 3 mph E | 1% |
| Saturday Night | 55°F | Mostly Cloudy then Rain Showers | 2 to 12 mph SE | 79% |
| Sunday | 65°F | Showers And Thunderstorms | 6 to 12 mph S | 98% |
| Sunday Night | 54°F | Rain Showers | 6 to 12 mph NW | 98% |
| Monday | 65°F | Slight Chance Rain Showers | 6 to 12 mph N | 23% |
| Monday Night | 49°F | Chance Rain Showers | 6 to 12 mph NE | 32% |
| Tuesday | 59°F | Chance Rain Showers | 8 to 12 mph E | 36% |
| Tuesday Night | 45°F | Chance Rain Showers | 8 to 15 mph E | 36% |
| Wednesday | 58°F | Chance Rain Showers | 10 to 15 mph E | 32% |
| Wednesday Night | 46°F | Chance Showers And Thunderstorms | 9 to 13 mph E | 39% |
| Thursday | 59°F | Chance Showers And Thunderstorms | 8 to 12 mph NE | 39% |
| Thursday Night | 48°F | Chance Showers And Thunderstorms | 7 mph NE | 34% |
| Friday | 66°F | Slight Chance Rain Showers | 9 mph N | 21% |
Forecast source: National Weather Service (api.weather.gov) for Clarks Summit (41.490, -75.707). Updated through the day.
Growing snapshot for Clarks Summit
Last spring frost
Apr 23
First fall frost
Oct 20
Growing season
178 days
Hardiness zone
6a
More local growing data for Clarks Summit: nearby ZIP 18471 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Archbald
Big Bass Lake
Blakely
Carbondale
Chinchilla
Clarks Green
Dalton
Dickson City
Dunmore
Eagle Lake
Factoryville
Glenburn
Gouldsboro
Jermyn
Jessup
Mayfield
Moosic
Moscow
Mount Cobb
Old Forge
Olyphant
Scranton
Simpson
Taylor
Throop
Waverly
Climate data from the nearest NOAA station, Wilkes-Barre Intl Ap, Pa (13.6 mi from Clarks Summit). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.