ZIP code · Royal Palm Beach · Florida · United States

ZIP code 33421 — Royal Palm Beach

ZIP code 33421 serves Royal Palm Beach, Florida.

Postal code: 33421
Single source Value from one source, not cross-checked.
City: Royal Palm Beach
County: Palm Beach
State: Florida
Country: United States
Coordinates: 26.7084, -80.2306 — precision precise (locality)
View on OpenStreetMap
USDA hardiness zone: 10b (35 to 40 °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: 561, 728 (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 33421 with another ZIP · ZIPs within 25 miles · distance from 33421

Climate — monthly normals

Warmest month Jul (avg high 90°F), coldest Jan (avg low 58°F).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high °F	75	77	79	82	86	88	90	90	88	85	80	77
Avg low °F	58	60	63	68	72	75	76	77	76	73	66	62
Precip in	3.5	2.6	3.3	3.7	4.9	8.5	5.6	8.7	8.0	5.9	3.6	3.5

NOAA 1991–2020 climate normals from the nearest station: WEST PALM BEACH INTL AP (8.3 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