91788 ZIP Code
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ZIP code 91788 covers Walnut, California. It has no Census ZIP Code Tabulation Area, which is how the Census Bureau treats ZIP codes that are not residential neighbourhoods — PO box-only ranges, military addresses, and codes assigned to a single large organisation. There are no population or income figures for it because nobody is counted as living there.
- Time zone
- Pacific UTC-08:00observes daylight saving time
- Businesses
- 16
Where 91788 is
Walnut, California — the point the Postal Service gives for this ZIP code. A ZIP code is a set of delivery routes rather than an area, so this marks its centre, not its boundary.
Business and employment
Census ZIP Code Business Patterns 2022
| Business establishments | 16 |
|---|---|
| People employed | 205 |
| Annual payroll | $5,806,000 |
Climate
NOAA US Climate Normals 1991-2020, from the nearest weather station with a full year of records. The station and its distance are named above, because a station forty kilometres away describes somewhere else.
| Weather station | POMONA/FAIRPLEX, CA US11.4 km away |
|---|---|
| Rain in a year | 14 in |
Average high and low by month
| January | 67.9°F / 43.1°F2.91 in rain |
|---|---|
| February | 67.3°F / 44.5°F4.15 in rain |
| March | 72°F / 47°F2.12 in rain |
| April | 75.8°F / 49.6°F0.97 in rain |
| May | 78.4°F / 54°F0.22 in rain |
| June | 84.3°F / 57.2°F0.06 in rain |
| July | 90.3°F / 62.3°F0 in rain |
| August | 92.4°F / 62.7°F0.03 in rain |
| September | 88.7°F / 60.4°F0.01 in rain |
| October | 80.5°F / 53.9°F0.97 in rain |
| November | 73.5°F / 47°F0.74 in rain |
| December | 66.9°F / 41.5°F2.29 in rain |
Nearby ZIP codes
The closest ZIP codes by centre point, which is not the same as sharing a border.
| 91789 Walnut, CA | 1 km away |
|---|---|
| 91792 West Covina, CA | 3 km away |
| 91748 Rowland Heights, CA | 5.2 km away |
| 91765 Diamond Bar, CA | 5.3 km away |
| 91791 West Covina, CA | 5.8 km away |
| 91744 La Puente, CA | 6.7 km away |
| 91723 Covina, CA | 7.5 km away |
| 91747 La Puente, CA | 7.8 km away |
Location, counties and time zone
County shares from Census 2020 ZCTA relationship files. Time zone from the USDOT National Transportation Atlas, which renders the boundaries written into 49 CFR Part 71.
| Time zone | Pacific (UTC-08:00 standard) |
|---|---|
| Daylight saving time | Observed |
| Latitude, longitude | 34.0203, -117.8653 |
Figures are published for this ZIP code or its Census tabulation area unless a section says otherwise. Estimates whose margin of error made them unreliable are omitted rather than shown. Sources: US Census Bureau, CDC, IRS.