Address reportCitiesCalifornia › Oceanside

Oceanside, CA

Earthquake hazard, typical weather and growing season from public federal data. Population 172,794.

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 Oceanside address →

Earthquake hazard high

Design category D

High seismic hazard. Strong ground shaking is expected over the life of a building. Substantial seismic-resistant design, detailing, and inspection are required by code. The ASCE 7 Seismic Design Category here is D. (Short-period design value Ss ≈ 1.064 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

71.3° in August, 46.7° in December

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

MonthHighLowRainSnow
Jan62.7°47.2°2.22"0"
Feb62°48°2.36"0"
Mar61.9°50.7°1.41"0"
Apr63.4°53.4°0.8"0"
May64.6°57.9°0.28"0"
Jun66.4°61.1°0.08"0"
Jul69.9°65°0.04"0"
Aug71.3°65.6°0.02"0"
Sep71.2°63.5°0.16"0"
Oct69.5°58.2°0.57"0"
Nov66.7°51.4°0.76"0"
Dec63.2°46.7°1.57"0"

NOAA/NCEI 1991–2020 U.S. Climate Normals — station OCEANSIDE MARINA, CA US, 7.2 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.

What this page does not tell you

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