ZIP code · Mount Washington · New Hampshire · United States
ZIP code 03589 — Mount Washington
ZIP code 03589 serves Mount Washington, New Hampshire.
- Postal code
- 03589Single source Value from one source, not cross-checked.
- City
- Mount Washington
- County
- Coos
- State
- New Hampshire
- Country
- United States
- Coordinates
- 44.6956, -71.3874 — precision estimated (postal-area centroid)
View on OpenStreetMap - USDA hardiness zone
- 4a (-30 to -25 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
- Area code
- 603 (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 03589 with another ZIP · ZIPs within 25 miles · distance from 03589
Nearby localities
Climate — monthly normals
Warmest month Jul (avg high 79°F), coldest Jan (avg low 2°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 25 | 28 | 37 | 52 | 66 | 74 | 79 | 77 | 70 | 56 | 42 | 31 |
| Avg low °F | 2 | 2 | 14 | 29 | 40 | 50 | 55 | 53 | 45 | 34 | 24 | 12 |
| Precip in | 2.5 | 2.2 | 2.4 | 3.0 | 3.7 | 4.4 | 4.5 | 4.0 | 3.6 | 4.2 | 2.9 | 3.0 |
NOAA 1991–2020 climate normals from the nearest station: N STRATFORD (9.8 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