ZIP code · Leander · Texas · United States

ZIP code 78646 — Leander

ZIP code 78646 serves Leander, Texas.

Postal code: 78646
Single source Value from one source, not cross-checked.
City: Leander
County: Williamson
State: Texas
Country: United States
Coordinates: 30.5788, -97.8531 — precision precise (locality)
View on OpenStreetMap
USDA hardiness zone: 8b (15 to 20 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone: America/Chicago (UTC−6 / UTC−5 DST)
Area codes: 512, 737
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 78646 with another ZIP · ZIPs within 25 miles · distance from 78646

Climate — monthly normals

Warmest month Aug (avg high 97°F), coldest Jan (avg low 36°F).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high °F	60	65	72	79	85	92	96	97	90	81	70	62
Avg low °F	36	40	47	54	63	70	72	72	67	57	46	38
Precip in	2.5	2.2	3.1	3.0	4.3	4.0	2.2	2.6	4.0	3.9	2.7	2.6

NOAA 1991–2020 climate normals from the nearest station: GEORGETOWN LAKE (10.4 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