Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated

Planting zone for 92711 — Santa Ana, CA

ZIP code 92711 (Santa Ana, Orange County) is in USDA zone 10b: the coldest winter night averages 35 to 40 °F.

Where ZIP 92711 is

tap the map for the zone at any spot · scroll or pinch to zoom

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.

Zone10b35 to 40 °F
Coldest night1.7 to 4.4 °C
Last frostrare
First frostrare
2012 zone10a

Was 10a on the 2012 map — half a zone warmer now. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 10b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Santa Ana, CA…

Forecast data: National Weather Service (api.weather.gov), public domain. This is not a warning service — for official frost and freeze warnings see weather.gov.

Frost dates

A 32 °F frost doesn't happen here in most winters. At the nearest station (NOAA station Tustin Irvine Rch, CA — 6 miles away, elevation 236 ft) the median growing season is 365 days. When frost does come, it is a midwinter night or two; cover tender plants when a freeze is forecast.

Frost data: NOAA NCEI U.S. Climate Normals 1991–2020.

When spring arrived in 2026

In 2026, spring leaf-out near 92711 came on Jan 16 — 5 days earlier than the 1991–2020 average (Jan 21).

JanFebMarAprMayJun

The Spring Index marks the day when accumulated warmth is enough for lilac and honeysuckle to leaf out — a widely used signal that the growing season has started. Source: USA National Phenology Network, www.usanpn.org — Spring Indices, first leaf, 2026 (data as of 2026-09-08) and 30-year average 1991–2020 (CC BY 4.0).

Soil in Santa Ana, CA

The soil mapped at the center of ZIP 92711 is Cropley — clay, moderately well drained.

TextureClayholds water and nutrients; slow to drain and warm up
pH7.0neutral; most vegetables like 6.0–7.0
DrainageModerately well drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupCwater soaks in slowly
Farmland classPrime farmland if irrigatedUSDA classification

Map unit: Cropley clay, 0 to 2 percent slopes, warm MAAT, MLRA 19.

Soil Survey Staff, Natural Resources Conservation Service, USDA. Soil Survey Geographic (SSURGO) Database, via Soil Data Access, accessed 2026-10-29. The soil at the center point of ZIP 92711; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Santa Ana, CA

Summer high85 °Faverage high, August
Winter low48 °Faverage low, December
Hot days30days a year at 90 °F or more
Freezing nights0nights a year at 32 °F or less
Growing degree days5,886base 50 °F — the season’s usable heat
Longest day14 h 24 mindaylight on June 21
Shortest day9 h 54 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation12.7 inper year, rain and melted snow

Average high and low, by month

40°50°60°70°80°90°100°January: average high 69 °F, low 49 °F 69°49° JanFebruary: average high 69 °F, low 50 °F 69°50° FebMarch: average high 71 °F, low 52 °F 71°52° MarApril: average high 73 °F, low 54 °F 73°54° AprMay: average high 75 °F, low 58 °F 75°58° MayJune: average high 78 °F, low 61 °F 78°61° JunJuly: average high 83 °F, low 65 °F 83°65° JulAugust: average high 85 °F, low 65 °F 85°65° AugSeptember: average high 84 °F, low 64 °F 84°64° SepOctober: average high 79 °F, low 59 °F 79°59° OctNovember: average high 74 °F, low 53 °F 74°53° NovDecember: average high 68 °F, low 48 °F 68°48° Dec

Precipitation by month inches

0″1″2″3″January: 2.89 in precipitation 2.9 JanFebruary: 2.90 in precipitation 2.9 FebMarch: 1.90 in precipitation 1.9 MarApril: 0.69 in precipitation 0.7 AprMay: 0.33 in precipitation 0.3 MayJune: 0.09 in precipitation 0.1 JunJuly: 0.08 in precipitation 0.1 JulAugust: 0.02 in precipitation 0.0 AugSeptember: 0.11 in precipitation 0.1 SepOctober: 0.56 in precipitation 0.6 OctNovember: 0.86 in precipitation 0.9 NovDecember: 2.30 in precipitation 2.3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Santa Ana Fire Stn, CA (4 mi away); precipitation: Irvine 4.1 Nne, CA (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

4 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

9270510b
Santa Ana, CA · 1 mi
9278110a
Tustin, CA · 2 mi
9278010a
Tustin, CA · 2 mi
9285610b
Orange, CA · 3 mi
9286610b
Orange, CA · 3 mi
9285910a
Orange, CA · 3 mi
9278210a
Tustin, CA · 3 mi
9286910b
Orange, CA · 3 mi

All 11 ZIP codes in Santa Ana → · California planting zones →

Questions about 92711

What planting zone is ZIP code 92711?

ZIP code 92711 (Santa Ana, CA) is in USDA hardiness zone 10b on the 2023 map: the coldest night of an average winter reaches 35 to 40 °F (1.7 to 4.4 °C).

How much rain and snow does 92711 get?

About 12.7 inches of precipitation a year (NOAA 1991–2020 normals, Irvine 4.1 Nne station).

How hot do summers get in Santa Ana, CA?

The average high peaks at 85 °F in August, with about 30 days a year at 90 °F or more.

What kind of soil does 92711 have?

The USDA soil survey maps Cropley at the center of ZIP 92711: clay, moderately well drained, pH about 7.0 (neutral).

Did spring come early in Santa Ana, CA in 2026?

Spring leaf-out near 92711 came on Jan 16 in 2026, 5 days earlier than the 1991–2020 average (Jan 21), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Santa Ana, CA?

Intermediate onions: the longest day near 92711 is 14 h 24 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 92711 change?

Yes. The 2012 USDA map put 92711 in zone 10a; the 2023 map puts it in zone 10b. The newer map uses 1991–2020 data and more weather stations.