ZIP code · Rockford · Illinois · United States

ZIP code 61105 — Rockford

ZIP code 61105 serves Rockford, Illinois.

Postal code: 61105
Single source Value from one source, not cross-checked.
City: Rockford
County: Winnebago
State: Illinois
Country: United States
Coordinates: 42.2711, -89.0940 — precision precise (locality)
View on OpenStreetMap
USDA hardiness zone: 5b (-15 to -10 °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: 815, 779
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 61105 with another ZIP · ZIPs within 25 miles · distance from 61105

Climate — monthly normals

Warmest month Jul (avg high 84°F), coldest Jan (avg low 15°F).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high °F	29	33	47	60	71	81	84	82	75	62	47	34
Avg low °F	15	18	28	39	50	60	64	62	54	42	31	20
Precip in	1.6	1.6	2.4	3.8	4.2	5.2	3.8	4.2	3.6	2.6	2.3	1.9

NOAA 1991–2020 climate normals from the nearest station: ROCKFORD GTR ROCKFORD AP (5.4 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