ZIP code · East Olympia · Washington · United States
ZIP code 98540 — East Olympia
ZIP code 98540 serves East Olympia, Washington.
- Postal code
- 98540Single source Value from one source, not cross-checked.
- City
- East Olympia
- County
- Thurston
- State
- Washington
- Country
- United States
- Coordinates
- 46.9781, -122.7024 — precision precise (locality)
View on OpenStreetMap - USDA hardiness zone
- 8a (10 to 15 °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
- 360 (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 98540 with another ZIP · ZIPs within 25 miles · distance from 98540
Climate — monthly normals
Warmest month Aug (avg high 78°F), coldest Feb (avg low 32°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 46 | 49 | 54 | 59 | 66 | 71 | 78 | 78 | 72 | 60 | 51 | 45 |
| Avg low °F | 33 | 32 | 35 | 38 | 43 | 47 | 51 | 51 | 46 | 41 | 36 | 33 |
| Precip in | 7.8 | 5.1 | 5.7 | 3.7 | 2.3 | 1.5 | 0.5 | 1.0 | 2.0 | 5.1 | 8.2 | 7.8 |
NOAA 1991–2020 climate normals from the nearest station: OLYMPIA AP (9.5 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