Address reportCitiesTexas › Brownsville

Brownsville, TX

Earthquake hazard, typical weather and growing season from public federal data. Population 181,860.

Flood zone: it depends on the exact parcel

There is no such thing as a flood zone for a whole city. Two houses on the same street can sit in different zones, and it is the single fact here that changes most over a short distance. So this page does not guess one.

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Earthquake hazard very-low

Design category A

Very low seismic hazard. Damaging earthquakes are rare at this location and design ground motions are minimal. Ordinary buildings carry essentially no special seismic-detailing requirement. The ASCE 7 Seismic Design Category here is A. (Short-period design value Ss ≈ 0.036 g — the standard headline measure of ground-shaking hazard.)

USGS Seismic Design Web Services (ASCE 7), assuming Site Class D — stiff or unknown soil. Real soil conditions can move the category either way.

Typical weather

96.3° in August, 53.1° in January

Thirty-year averages, not a forecast. Any individual year can differ substantially.

MonthHighLowRainSnow
Jan72.6°53.1°1.08"0"
Feb76.2°56.9°1.03"0"
Mar80.6°62°1.45"0"
Apr85.7°67.7°1.47"0"
May90.3°73.7°2.22"0"
Jun94°77.2°2.86"0"
Jul95°77.8°1.98"0"
Aug96.3°77.8°2.16"0"
Sep92.2°74.7°5.73"0"
Oct87.3°68.6°3.83"0"
Nov80.3°60.8°1.76"0"
Dec74.2°54.7°1.21"0"

NOAA/NCEI 1991–2020 U.S. Climate Normals — station BROWNSVILLE, TX US, 8.7 mi away.

Growing season zone 10a

365 frost-free days

Last spring frost around n/a, first fall frost around n/a. Roughly half of years see frost outside that window.

2023 USDA Plant Hardiness Zone Map and NOAA/NCEI 1991–2020 frost normals.

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