ZIP code · Pasadena · California · United States
ZIP code 91121 — Pasadena
ZIP code 91121 serves Pasadena, California.
- Postal code
- 91121Single source Value from one source, not cross-checked.
- City
- Pasadena
- County
- Los Angeles
- State
- California
- Country
- United States
- Coordinates
- 34.1478, -118.1445 — precision precise (locality)
View on OpenStreetMap - USDA hardiness zone
- 10a (30 to 35 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Los_Angeles (UTC−8 / UTC−7 DST)
- Area code
- 626 (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 91121 with another ZIP · ZIPs within 25 miles · distance from 91121
Climate — monthly normals
Warmest month Aug (avg high 91°F), coldest Dec (avg low 45°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 68 | 69 | 73 | 76 | 78 | 84 | 89 | 91 | 90 | 83 | 75 | 67 |
| Avg low °F | 46 | 46 | 48 | 51 | 54 | 58 | 62 | 63 | 62 | 56 | 50 | 45 |
| Precip in | 4.5 | 5.2 | 3.0 | 1.1 | 0.5 | 0.2 | 0.1 | 0.0 | 0.2 | 0.8 | 1.1 | 3.3 |
NOAA 1991–2020 climate normals from the nearest station: PASADENA (0.1 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