ZIP code · Whippany · New Jersey · United States

ZIP code 07999 — Whippany

ZIP code 07999 serves Whippany, New Jersey.

Postal code: 07999
Single source Value from one source, not cross-checked.
City: Whippany
County: Morris
State: New Jersey
Country: United States
Coordinates: 40.8673, -74.5783 — 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: 973, 862
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 07999 with another ZIP · ZIPs within 25 miles · distance from 07999

Climate — monthly normals

Warmest month Jul (avg high 85°F), coldest Jan (avg low 21°F).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high °F	38	40	48	61	71	81	85	84	77	64	53	42
Avg low °F	21	22	29	39	49	59	64	62	54	42	33	26
Precip in	3.7	2.8	4.2	3.6	4.0	4.9	4.7	3.7	4.7	4.5	4.1	4.4

NOAA 1991–2020 climate normals from the nearest station: BOONTON 1 SE (9.6 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