ZIP code · Old Zionsville · Pennsylvania · United States

ZIP code 18068 — Old Zionsville

ZIP code 18068 serves Old Zionsville, Pennsylvania.

Postal code: 18068
Single source Value from one source, not cross-checked.
City: Old Zionsville
County: Lehigh
State: Pennsylvania
Country: United States
Coordinates: 40.4865, -75.5202 — precision precise (locality)
View on OpenStreetMap
USDA hardiness zone: 7a (0 to 5 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone: America/New_York (UTC−5 / UTC−4 DST)
Area codes: 610, 484 (from the nearest rate centre)
Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.

Tools: compare 18068 with another ZIP · ZIPs within 25 miles · distance from 18068

Climate — monthly normals

Warmest month Jul (avg high 85°F), coldest Jan (avg low 20°F).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high °F	38	41	49	62	72	80	85	83	77	65	53	43
Avg low °F	20	21	29	39	49	58	62	60	53	41	32	25
Precip in	3.4	2.8	3.9	4.1	3.8	4.5	5.4	4.4	4.8	4.3	3.6	3.8

NOAA 1991–2020 climate normals from the nearest station: RODALE RSCH CTR (11.5 mi) · NOAA NCEI

About this page

US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.

GeoNames · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page