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Bellflower, CA

Earthquake hazard, typical weather and growing season from public federal data. Population 77,593.

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.

Look up a specific Bellflower address →

Earthquake hazard very-high

Design category D

Very high seismic hazard — at or near a major active fault. Very strong ground shaking is likely and the most stringent seismic-design provisions apply. A site-specific ground-motion study is typically required. The ASCE 7 Seismic Design Category here is D. (Short-period design value Ss ≈ 1.578 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

83.2° in August, 46.6° in December

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

MonthHighLowRain
Jan67.4°46.9°2.89"
Feb66.8°48.4°3.02"
Mar68.6°51.2°1.65"
Apr71.4°53.9°0.56"
May73.1°57.9°0.26"
Jun76.1°61.3°0.07"
Jul81.4°64.9°0.05"
Aug83.2°65.5°0.01"
Sep82.4°63.9°0.08"
Oct77.7°59.1°0.53"
Nov72.5°51.6°0.75"
Dec66.7°46.6°2.15"

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 — Bellflower may well get plenty.

NOAA/NCEI 1991–2020 U.S. Climate Normals — station LONG BEACH DAUGHERTY FLD, CA US, 5.4 mi away.

Growing season zone 10b

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.

What this page does not tell you

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