ZIP code · New Castle · Delaware · United States
ZIP code 19726 — New Castle
ZIP code 19726 serves New Castle, Delaware.
- Postal code
- 19726Single source Value from one source, not cross-checked.
- City
- New Castle
- County
- New Castle
- State
- Delaware
- Country
- United States
- Coordinates
- 39.6621, -75.5663 — precision precise (locality)
View on OpenStreetMap - USDA hardiness zone
- 7b (5 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
- 302Telephone 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 19726 with another ZIP · ZIPs within 25 miles · distance from 19726
Nearby localities
Climate — monthly normals
Warmest month Jul (avg high 87°F), coldest Jan (avg low 26°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 41 | 44 | 53 | 64 | 74 | 82 | 87 | 85 | 79 | 67 | 56 | 46 |
| Avg low °F | 26 | 27 | 34 | 44 | 53 | 63 | 68 | 67 | 59 | 47 | 37 | 30 |
| Precip in | 3.2 | 2.8 | 4.2 | 3.5 | 3.6 | 4.7 | 4.4 | 4.0 | 4.4 | 3.7 | 3.1 | 3.9 |
NOAA 1991–2020 climate normals from the nearest station: WILMINGTON NEW CASTLE CO AP (2.0 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