ZIP code · Seguin · Texas · United States
ZIP code 78156 — Seguin
ZIP code 78156 serves Seguin, Texas.
- Postal code
- 78156Single source Value from one source, not cross-checked.
- City
- Seguin
- County
- Guadalupe
- State
- Texas
- Country
- United States
- Coordinates
- 29.6118, -97.9712 — precision precise (locality)
View on OpenStreetMap - USDA hardiness zone
- 9a (20 to 25 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Chicago (UTC−6 / UTC−5 DST)
- Area code
- 830Telephone 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 78156 with another ZIP · ZIPs within 25 miles · distance from 78156
Climate — monthly normals
Warmest month Aug (avg high 98°F), coldest Jan (avg low 40°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 64 | 68 | 75 | 82 | 88 | 93 | 96 | 98 | 92 | 84 | 73 | 65 |
| Avg low °F | 40 | 44 | 51 | 58 | 66 | 71 | 73 | 73 | 68 | 59 | 49 | 42 |
| Precip in | 2.1 | 1.7 | 2.5 | 2.0 | 3.6 | 3.4 | 2.2 | 2.0 | 3.5 | 3.3 | 2.5 | 2.4 |
NOAA 1991–2020 climate normals from the nearest station: AUSTIN SAN ANTONIO (7.2 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