Address reportCitiesAlabama › Mobile

Mobile, AL

Earthquake hazard, typical weather and growing season from public federal data. Population 194,899.

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 low

Design category B

Low seismic hazard. Earthquakes are infrequent and usually minor here, but the building code still applies light seismic detailing to new construction. The ASCE 7 Seismic Design Category here is B. (Short-period design value Ss ≈ 0.094 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

91.9° in August, 42.5° in January

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

MonthHighLowRain
Jan62.1°42.5°5.19"
Feb65.8°46.1°3.77"
Mar71.8°51.8°5.11"
Apr77.9°58.6°4.86"
May85°66.3°4.42"
Jun90°73.1°5.78"
Jul91.7°75.3°6.57"
Aug91.9°75.3°7.14"
Sep88.8°71.8°4.47"
Oct81.3°61°3.8"
Nov71.6°49.9°4.13"
Dec64.3°44.9°5.28"

This station records temperature and precipitation but not snowfall, so no snow column is shown. That is missing data, not a report of zero snow — Mobile may well get plenty.

NOAA/NCEI 1991–2020 U.S. Climate Normals — station MOBILE DWTN AP, AL US, 5.2 mi away.

Growing season zone 9a

292 frost-free days

Last spring frost around February 21, first fall frost around December 6. Roughly half of years see frost outside that window.

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

What this page does not tell you

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