ZIP code · Rochester · New Hampshire · United States
ZIP code 03866 — Rochester
ZIP code 03866 serves Rochester, New Hampshire.
- Postal code
- 03866Single source Value from one source, not cross-checked.
- City
- Rochester
- County
- Strafford
- State
- New Hampshire
- Country
- United States
- Coordinates
- 43.3045, -70.9756 — precision precise (locality)
View on OpenStreetMap - USDA hardiness zone
- 6a (-10 to -5 °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
- 603Telephone 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 03866 with another ZIP · ZIPs within 25 miles · distance from 03866
Nearby localities
Climate — monthly normals
Warmest month Jul (avg high 82°F), coldest Jan (avg low 15°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 33 | 35 | 44 | 57 | 67 | 77 | 82 | 81 | 73 | 60 | 48 | 37 |
| Avg low °F | 15 | 17 | 25 | 35 | 45 | 54 | 60 | 58 | 50 | 39 | 31 | 22 |
| Precip in | 2.5 | 2.2 | 3.7 | 3.7 | 3.5 | 3.9 | 3.5 | 3.2 | 3.4 | 4.4 | 3.9 | 3.3 |
NOAA 1991–2020 climate normals from the nearest station: ROCHESTER SKYHAVEN AP (3.2 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