Northumberland County, Pennsylvania
Local growing conditions for Northumberland County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 22 ZIP codes in our data.
Hardiness zones in Northumberland County
Northumberland County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Northumberland County for its live forecast, frost dates, and planting calendar:
Dalmatia 17017
Dewart 17730
McEwensville 17749
Dewart 17777
Sunbury 17801
Trevorton 17823
Herndon 17830
Kulpmont 17832
Kulpmont 17834
Fairview-Ferndale 17836
Locust Gap 17840
Milton 17847
Montandon 17850
Atlas 17851
Northumberland 17857
Elysburg 17860
Milton 17865
Fairview-Ferndale 17866
Klingerstown 17867
Riverside 17868
Trevorton 17872
Trevorton 17881
More for Pennsylvania
- Agriculture in Pennsylvania
- Frost dates across Pennsylvania
- USDA hardiness zones explained
- Planting calendar by ZIP code
← All counties in Pennsylvania
County growing conditions are compiled from our ZIP-code database, USDA hardiness-zone data, and NOAA climate normals. Conditions vary within a county by elevation and local microclimate. Page updated Aug 4, 2026.