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.
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 ≈ 1.184 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
77.1° in September, 46° in December
Thirty-year averages, not a forecast. Any individual year can differ substantially.
| Month | High | Low | Rain | Snow |
|---|---|---|---|---|
| Jan | 67.5° | 46.5° | 1.82" | 0" |
| Feb | 66.8° | 48.3° | 2.33" | 0" |
| Mar | 67° | 51.4° | 1.39" | 0" |
| Apr | 68.4° | 53.5° | 0.67" | 0" |
| May | 68.9° | 58° | 0.27" | 0" |
| Jun | 71° | 61.2° | 0.05" | 0" |
| Jul | 74.6° | 64.7° | 0.06" | 0" |
| Aug | 76.9° | 65.8° | 0.01" | 0" |
| Sep | 77.1° | 64° | 0.09" | 0" |
| Oct | 74.9° | 58.5° | 0.36" | 0" |
| Nov | 71.1° | 50.9° | 0.57" | 0" |
| Dec | 66.5° | 46° | 1.58" | 0" |
NOAA/NCEI 1991–2020 U.S. Climate Normals — station CHULA VISTA, CA US, 2.1 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
- Nothing about a specific property — only the area around it.
- No flood zone, deliberately: that is parcel-level and this page would have to guess.
- Nothing about wildfire, radon, subsidence, soil or the building itself.
- Climate normals describe a typical year, not the year you are about to have.