ZIP code · Castine · Maine · United States
ZIP code 04420 — Castine
ZIP code 04420 serves Castine, Maine.
- Postal code
- 04420Single source Value from one source, not cross-checked.
- City
- Castine
- County
- Hancock
- State
- Maine
- Country
- United States
- Coordinates
- 44.4130, -68.7980 — precision precise (locality)
View on OpenStreetMap - USDA hardiness zone
- 5b (-15 to -10 °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
- 207Telephone 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 04420 with another ZIP · ZIPs within 25 miles · distance from 04420
Climate — monthly normals
Warmest month Jul (avg high 77°F), coldest Jan (avg low 10°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 30 | 32 | 40 | 52 | 63 | 72 | 77 | 76 | 70 | 57 | 46 | 35 |
| Avg low °F | 10 | 12 | 20 | 31 | 41 | 51 | 57 | 56 | 48 | 38 | 29 | 18 |
| Precip in | 3.9 | 3.2 | 4.1 | 4.4 | 3.9 | 4.3 | 3.2 | 3.1 | 4.1 | 5.4 | 4.7 | 4.7 |
NOAA 1991–2020 climate normals from the nearest station: BELFAST (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