ZIP code · Janesville · Illinois · United States
ZIP code 62435 — Janesville
ZIP code 62435 serves Janesville, Illinois.
- Postal code
- 62435Single source Value from one source, not cross-checked.
- City
- Janesville
- County
- Cumberland
- State
- Illinois
- Country
- United States
- Coordinates
- 39.3743, -88.2445 — precision precise (locality)
View on OpenStreetMap - Time zone
- America/Chicago (UTC−6 / UTC−5 DST)
- Area code
- 217 (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 62435 with another ZIP · ZIPs within 25 miles · distance from 62435
Climate — monthly normals
Warmest month Jul (avg high 86°F), coldest Jan (avg low 20°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 35 | 40 | 52 | 64 | 74 | 83 | 86 | 84 | 79 | 66 | 51 | 40 |
| Avg low °F | 20 | 24 | 33 | 43 | 54 | 63 | 66 | 64 | 56 | 45 | 35 | 26 |
| Precip in | 2.0 | 1.8 | 2.2 | 4.1 | 3.9 | 4.7 | 4.0 | 2.4 | 2.9 | 3.1 | 3.0 | 1.8 |
NOAA 1991–2020 climate normals from the nearest station: MATTOON COLES CO AP (7.4 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. Data generated on 2026-08-21. Methodology · Report an error on this page