Atlas, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Atlas, a community in Northumberland County, Pennsylvania.
Tonight
50°F
Mostly Clear
Mostly clear, with a low around 50. South wind around 2 mph.
7-day forecast for Atlas
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Mostly Clear | 2 mph S | 2% |
| Wednesday | 70°F | Mostly Sunny | 2 to 7 mph S | 2% |
| Wednesday Night | 58°F | Mostly Cloudy then Rain Showers Likely | 7 mph S | 69% |
| Thursday | 68°F | Rain Showers | 3 to 7 mph S | 90% |
| Thursday Night | 56°F | Chance Rain Showers | 2 mph SW | 48% |
| Friday | 65°F | Chance Rain Showers | 2 mph NW | 48% |
| Friday Night | 46°F | Chance Rain Showers | 2 mph NW | 46% |
| Saturday | 59°F | Slight Chance Rain Showers | 2 to 6 mph NW | 18% |
| Saturday Night | 38°F | Slight Chance Rain Showers then Partly Cloudy | 5 mph NW | 17% |
| Sunday | 56°F | Mostly Sunny | 5 mph W | 6% |
| Sunday Night | 36°F | Slight Chance Rain Showers | 6 mph W | 18% |
| Monday | 55°F | Slight Chance Rain Showers | 6 to 9 mph NW | 24% |
| Monday Night | 36°F | Slight Chance Rain Showers | 6 mph W | 23% |
| Tuesday | 58°F | Mostly Sunny | 8 mph SW | 14% |
Forecast source: National Weather Service (api.weather.gov) for Atlas (40.797, -76.428). Updated through the day.
Growing snapshot for Atlas
Last spring frost
Apr 27
First fall frost
Oct 20
Growing season
172 days
Hardiness zone
6b
More local growing data for Atlas: nearby ZIP 17851 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Allenwood
Dalmatia
Dewart
Edgewood
Fairview-Ferndale
Klingerstown
Kulpmont
Lewisburg
Linntown
Locust Gap
Marion Heights
Marshallton
McEwensville
Montandon
Mount Carmel
Northumberland
Ranshaw
Riverside
Shamokin
Snydertown
Strong
Sunbury
Tharptown (Uniontown)
Trevorton
Turbotville
Watsontown
Climate data from the nearest NOAA station, Bear Gap, Pa (4 mi from Atlas). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.