ZIP code · Allentown · Pennsylvania · United States

ZIP code 18105 — Allentown

ZIP code 18105 serves Allentown, Pennsylvania.

Postal code: 18105
Single source Value from one source, not cross-checked.
City: Allentown
County: Lehigh
State: Pennsylvania
Country: United States
Coordinates: 40.6084, -75.4902 — 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: 484, 610, 835
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 18105 with another ZIP · ZIPs within 25 miles · distance from 18105

Climate — monthly normals

Warmest month Jul (avg high 86°F), coldest Jan (avg low 22°F).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high °F	38	42	51	63	74	82	86	84	77	66	54	43
Avg low °F	22	23	31	40	51	60	65	63	55	44	34	27
Precip in	3.3	2.8	3.6	3.7	3.6	4.4	5.3	4.6	4.8	4.1	3.2	3.9

NOAA 1991–2020 climate normals from the nearest station: ALLENTOWN INTL AP (3.6 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