ZIP code · Chatham · Pennsylvania · United States

ZIP code 19318 — Chatham

ZIP code 19318 serves Chatham, Pennsylvania.

Postal code: 19318
Single source Value from one source, not cross-checked.
City: Chatham
County: Chester
State: Pennsylvania
Country: United States
Coordinates: 39.8524, -75.8118 — 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 (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 19318 with another ZIP · ZIPs within 25 miles · distance from 19318

Climate — monthly normals

Warmest month Jul (avg high 84°F), coldest Jan (avg low 23°F).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high °F	39	41	50	62	71	80	84	82	75	64	53	43
Avg low °F	23	24	31	40	50	59	64	62	55	44	34	28
Precip in	3.6	3.1	4.4	3.8	3.6	4.4	4.2	4.3	4.5	4.0	3.2	4.0

NOAA 1991–2020 climate normals from the nearest station: AVONDALE 2 N (1.4 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