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 ≈ 1.223 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
87.3° in August, 42.8° in December
Thirty-year averages, not a forecast. Any individual year can differ substantially.
| Month | High | Low | Rain | Snow |
|---|---|---|---|---|
| Jan | 67.8° | 43.3° | 3.09" | 0" |
| Feb | 69.1° | 44.6° | 3.39" | 0" |
| Mar | 71.7° | 47.8° | 2.11" | 0" |
| Apr | 74.2° | 49.6° | 0.8" | 0" |
| May | 76.6° | 54.6° | 0.32" | 0" |
| Jun | 79.6° | 58.2° | 0.09" | 0" |
| Jul | 85.1° | 61.4° | 0.01" | 0" |
| Aug | 87.3° | 63.1° | 0" | 0" |
| Sep | 86.8° | 61.1° | 0.18" | 0" |
| Oct | 83.6° | 54.8° | 0.67" | 0" |
| Nov | 75.9° | 47.3° | 1.21" | 0" |
| Dec | 69.9° | 42.8° | 2.25" | 0" |
NOAA/NCEI 1991–2020 U.S. Climate Normals — station TUSTIN IRVINE RCH, CA US, 5.6 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.