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

Planting zone for 92672 — San Clemente, CA

ZIP code 92672 (San Clemente, Orange County) is in USDA zone 10b: the coldest winter night averages 35 to 40 °F. The median last spring frost is February 16 and the first fall frost December 8.

Where ZIP 92672 is

Outlined: the ZIP code area · 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 frostFeb 16
First frostDec 8
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 San Clemente, 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 in San Clemente, CA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostFebruary 16median — 50% chance of a later frost
Safe for tender plantsMarch 18only 10% chance of frost after
First fall frostDecember 8median — 10% chance by Nov 21
Growing season298 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 11 and returns around December 22.

From the NOAA station Camp Pendleton Mcas, CA — 11 miles away, elevation 75 ft. NOAA NCEI U.S. Climate Normals 1991–2020, 32 °F threshold. Low spots and valleys can freeze later in spring than the station.

When to plant vegetables in 92672

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Jan 5 – Jan 19
SpinachSow outdoors · Jan 5 – Jan 26
Broccoli, cabbageStart indoors · Dec 8 – Dec 22
Broccoli, cabbageTransplant · Jan 26 – Feb 9
Onion setsPlant outdoors · Jan 19 – Feb 2
PotatoesPlant outdoors · Jan 26 – Feb 9
LettuceSow outdoors · Jan 19 – Feb 2
Carrots, beetsSow outdoors · Jan 26 – Feb 9
TomatoesStart indoors · Dec 22 – Jan 5
TomatoesTransplant · Feb 23 – Mar 9
Peppers, eggplantStart indoors · Dec 8 – Dec 22
Peppers, eggplantTransplant · Mar 2 – Mar 16
BeansSow outdoors · Feb 23 – Mar 9
Sweet cornSow outdoors · Feb 23 – Mar 9
Cucumbers, squashSow outdoors · Feb 23 – Mar 9
Fall lettuce, spinachSow outdoors · Oct 13 – Oct 27
GarlicPlant cloves · Nov 24 – Dec 29
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Feb 16) and first fall frost (Dec 8) with the rules of thumb U.S. extension services publish. Cool-season crops take a light frost; warm-season crops do best once the soil is above about 60 °F.

When spring arrived in 2026

In 2026, spring leaf-out near 92672 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 San Clemente, CA

The soil mapped at the center of ZIP 92672 is Hambright — gravelly clay loam, well drained.

TextureGravelly clay loamholds water and nutrients; slow to drain and warm up
pH6.3slightly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Hambright gravelly clay loam, 30 to 75 percent slopes.

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 92672; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in San Clemente, CA

Summer high83 °Faverage high, August
Winter low39 °Faverage low, December
Hot days18days a year at 90 °F or more
Freezing nights15nights a year at 32 °F or less
Growing degree days4,531base 50 °F — the season’s usable heat
Longest day14 h 22 mindaylight on June 21
Shortest day9 h 56 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation10.3 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°90°32 °FJanuary: average high 69 °F, low 40 °F 69°40° JanFebruary: average high 69 °F, low 41 °F 69°41° FebMarch: average high 69 °F, low 45 °F 69°45° MarApril: average high 72 °F, low 48 °F 72°48° AprMay: average high 72 °F, low 53 °F 72°53° MayJune: average high 76 °F, low 57 °F 76°57° JunJuly: average high 80 °F, low 60 °F 80°60° JulAugust: average high 83 °F, low 61 °F 83°61° AugSeptember: average high 83 °F, low 58 °F 83°58° SepOctober: average high 79 °F, low 52 °F 79°52° OctNovember: average high 75 °F, low 44 °F 75°44° NovDecember: average high 69 °F, low 39 °F 69°39° Dec

Precipitation by month inches

0″1″2″3″January: 2.22 in precipitation 2.2 JanFebruary: 2.36 in precipitation 2.4 FebMarch: 1.41 in precipitation 1.4 MarApril: 0.80 in precipitation 0.8 AprMay: 0.28 in precipitation 0.3 MayJune: 0.08 in precipitation 0.1 JunJuly: 0.04 in precipitation 0.0 JulAugust: 0.02 in precipitation 0.0 AugSeptember: 0.16 in precipitation 0.2 SepOctober: 0.57 in precipitation 0.6 OctNovember: 0.76 in precipitation 0.8 NovDecember: 1.57 in precipitation 1.6 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Camp Pendleton Mcas, CA (11 mi away); precipitation: Oceanside Marina, CA (14 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

9205510b
Camp Pendleton, CA · 6 mi
9267410a
San Clemente, CA · 7 mi
9267310b
San Clemente, CA · 8 mi
9262410b
Capistrano Beach, CA · 10 mi
9269410b
Ladera Ranch, CA · 10 mi
9267510b
San Juan Capistrano, CA · 12 mi
9269310b
San Juan Capistrano, CA · 12 mi
9205810a
Oceanside, CA · 13 mi

All 3 ZIP codes in San Clemente → · California planting zones →

Questions about 92672

What planting zone is ZIP code 92672?

ZIP code 92672 (San Clemente, 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).

When is the last frost in San Clemente, CA?

The median last spring frost (32 °F) near 92672 is February 16; after March 18 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Camp Pendleton Mcas station.

When is the first frost in San Clemente, CA?

The median first fall frost near 92672 is December 8, giving a median frost-free growing season of 298 days.

When should I plant tomatoes in 92672?

Start tomato seeds indoors around Dec 22 – Jan 5 and set transplants outside around Feb 23 – Mar 9, one to three weeks after the median last frost.

How much rain and snow does 92672 get?

About 10.3 inches of precipitation a year (NOAA 1991–2020 normals, Oceanside Marina station).

How hot do summers get in San Clemente, CA?

The average high peaks at 83 °F in August, with about 18 days a year at 90 °F or more.

What kind of soil does 92672 have?

The USDA soil survey maps Hambright at the center of ZIP 92672: gravelly clay loam, well drained, pH about 6.3 (slightly acidic).

Did spring come early in San Clemente, CA in 2026?

Spring leaf-out near 92672 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 San Clemente, CA?

Intermediate onions: the longest day near 92672 is 14 h 22 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 92672 change?

Yes. The 2012 USDA map put 92672 in zone 10a; the 2023 map puts it in zone 10b. The newer map uses 1991–2020 data and more weather stations.