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

Planting zone for 92676 — Silverado, CA

ZIP code 92676 (Silverado, Orange County) is in USDA zone 10b: the coldest winter night averages 35 to 40 °F.

Where ZIP 92676 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 frostrare
First frostrare
2012 zone10b

Same zone as on the 2012 map. 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 Silverado, 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 — 9 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 92676 came on Jan 17 — 3 days earlier than the 1991–2020 average (Jan 20).

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 Silverado, CA

The soil mapped at the center of ZIP 92676 is Friant — gravelly fine sandy loam, well drained.

TextureGravelly fine sandy loamdrains and warms fast; dries out and needs more feeding
pH6.5neutral; 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: Friant fine sandy 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 92676; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Silverado, CA

Summer high90 °Faverage high, August
Winter low48 °Faverage low, February
Hot days62days a year at 90 °F or more
Freezing nights1nights a year at 32 °F or less
Growing degree days6,135base 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
Precipitation17.3 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 71 °F, low 48 °F 71°48° FebMarch: average high 73 °F, low 50 °F 73°50° MarApril: average high 76 °F, low 52 °F 76°52° AprMay: average high 79 °F, low 56 °F 79°56° MayJune: average high 83 °F, low 59 °F 83°59° JunJuly: average high 88 °F, low 62 °F 88°62° JulAugust: average high 90 °F, low 62 °F 90°62° AugSeptember: average high 89 °F, low 62 °F 89°62° SepOctober: average high 84 °F, low 58 °F 84°58° OctNovember: average high 76 °F, low 53 °F 76°53° NovDecember: average high 68 °F, low 48 °F 68°48° Dec

Precipitation by month inches

0″1″2″3″4″January: 3.35 in precipitation 3.4 JanFebruary: 3.95 in precipitation 4.0 FebMarch: 2.40 in precipitation 2.4 MarApril: 1.17 in precipitation 1.2 AprMay: 0.49 in precipitation 0.5 MayJune: 0.08 in precipitation 0.1 JunJuly: 0.09 in precipitation 0.1 JulAugust: 0.04 in precipitation 0.0 AugSeptember: 0.18 in precipitation 0.2 SepOctober: 0.75 in precipitation 0.8 OctNovember: 1.50 in precipitation 1.5 NovDecember: 3.26 in precipitation 3.3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Irvine Rch, CA (6 mi away); precipitation: Silverado 1.0 Ese, CA (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

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

9261010b
Foothill Ranch, CA · 5 mi
9288110a
Corona, CA · 6 mi
9286210b
Orange, CA · 6 mi
9260210b
Irvine, CA · 7 mi
9267910b
Trabuco Canyon, CA · 8 mi
9288310a
Corona, CA · 8 mi
9288210a
Corona, CA · 8 mi
9263010b
Lake Forest, CA · 8 mi

California planting zones →

Questions about 92676

What planting zone is ZIP code 92676?

ZIP code 92676 (Silverado, 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 92676 get?

About 17.3 inches of precipitation a year (NOAA 1991–2020 normals, Silverado 1.0 Ese station).

How hot do summers get in Silverado, CA?

The average high peaks at 90 °F in August, with about 62 days a year at 90 °F or more.

What kind of soil does 92676 have?

The USDA soil survey maps Friant at the center of ZIP 92676: gravelly fine sandy loam, well drained, pH about 6.5 (neutral).

Did spring come early in Silverado, CA in 2026?

Spring leaf-out near 92676 came on Jan 17 in 2026, 3 days earlier than the 1991–2020 average (Jan 20), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Silverado, CA?

Intermediate onions: the longest day near 92676 is 14 h 24 min, so day-neutral types bulb best; long-day varieties may not bulb fully.