ZIP code · Silverlake · Washington · United States
ZIP code 98645 — Silverlake
ZIP code 98645 serves Silverlake, Washington.
- Postal code
- 98645Single source Value from one source, not cross-checked.
- City
- Silverlake
- County
- Cowlitz FIPS 53015
- State
- Washington
- Country
- United States
- Coordinates
- 46.3163, -122.7649 — precision estimated (postal-area centroid)
View on OpenStreetMap - Population
- 2,195 (ZCTA, ACS 5-year)
- Population density
- 145 / sq mi
- Land area
- 15.2 sq mi (39.3 km²) (ZCTA, ACS 5-year)
- Median household income
- $102,664
- Per-capita income
- $45,664
- Median age
- 52.7
- Households
- 851
- Housing units
- 891
- Median home value
- $467,000
- Median gross rent
- $782 / month
- Congressional district
- WA-3 (119th Congress)
- USDA hardiness zone
- 8b (15 to 20 °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
- 425Telephone 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 98645 with another ZIP · ZIPs within 25 miles · distance from 98645
Map of ZIP code 98645
Climate — monthly normals
Warmest month Aug (avg high 81°F), coldest Feb (avg low 34°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 46 | 51 | 56 | 61 | 68 | 72 | 79 | 81 | 75 | 62 | 52 | 45 |
| Avg low °F | 35 | 34 | 38 | 41 | 46 | 50 | 52 | 51 | 47 | 42 | 37 | 35 |
NOAA 1991–2020 climate normals from the nearest station: TOLEDO FAA AP (11.8 mi) · NOAA NCEI
Places in ZIP 98645
- 2 schools
- 1 parks
- 1 playgrounds
- 1 post offices
- 1 gas stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
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 · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page