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

Planting zone for 92284 — Yucca Valley, CA

ZIP code 92284 (Yucca Valley, San Bernardino County) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F. The median last spring frost is March 14 and the first fall frost November 28.

Where ZIP 92284 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.

Zone9a20 to 25 °F
Coldest night−6.7 to −3.9 °C
Last frostMar 14
First frostNov 28
2012 zone8b

Was 8b 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 9a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Yucca Valley, 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 Yucca Valley, CA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 14median — 50% chance of a later frost
Safe for tender plantsApril 1only 10% chance of frost after
First fall frostNovember 28median — 10% chance by Nov 10
Growing season255 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 7 and returns around December 8.

From the NOAA station Yucca Valley, CA — 3 miles away, elevation 3,248 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 92284

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Jan 31 – Feb 14
SpinachSow outdoors · Jan 31 – Feb 21
Broccoli, cabbageStart indoors · Jan 3 – Jan 17
Broccoli, cabbageTransplant · Feb 21 – Mar 7
Onion setsPlant outdoors · Feb 14 – Feb 28
PotatoesPlant outdoors · Feb 21 – Mar 7
LettuceSow outdoors · Feb 14 – Feb 28
Carrots, beetsSow outdoors · Feb 21 – Mar 7
TomatoesStart indoors · Jan 17 – Jan 31
TomatoesTransplant · Mar 21 – Apr 4
Peppers, eggplantStart indoors · Jan 3 – Jan 17
Peppers, eggplantTransplant · Mar 28 – Apr 11
BeansSow outdoors · Mar 21 – Apr 4
Sweet cornSow outdoors · Mar 21 – Apr 4
Cucumbers, squashSow outdoors · Mar 21 – Apr 4
Fall lettuce, spinachSow outdoors · Oct 3 – Oct 17
GarlicPlant cloves · Nov 14 – Dec 19
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 14) and first fall frost (Nov 28) 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 92284 came on Jan 27 — 7 days earlier than the 1991–2020 average (Feb 3).

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 Yucca Valley, CA

The soil mapped at the center of ZIP 92284 is Typic Torriorthents — gravelly sandy loam, somewhat excessively drained.

TextureGravelly sandy loamdrains and warms fast; dries out and needs more feeding
pH8.0alkaline; most vegetables like 6.0–7.0
DrainageSomewhat excessively drainednatural drainage class
Organic matter0.25%low — add compost
Hydrologic groupAwater soaks in fast
Farmland classNot prime farmlandUSDA classification

Map unit: Typic Torriorthents and Typic Haplargids; thermic fan piedmonts.

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 92284; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Yucca Valley, CA

Summer high96 °Faverage high, July
Winter low34 °Faverage low, December
Hot days109days a year at 90 °F or more
Freezing nights31nights a year at 32 °F or less
Growing degree days5,224base 50 °F — the season’s usable heat
Longest day14 h 26 mindaylight on June 21
Shortest day9 h 52 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation6.3 inper year, rain and melted snow
Snowfall2 inper year

Average high and low, by month

20°30°40°50°60°70°80°90°100°110°32 °FJanuary: average high 58 °F, low 38 °F 58°38° JanFebruary: average high 61 °F, low 39 °F 61°39° FebMarch: average high 67 °F, low 40 °F 67°40° MarApril: average high 73 °F, low 47 °F 73°47° AprMay: average high 82 °F, low 52 °F 82°52° MayJune: average high 91 °F, low 59 °F 91°59° JunJuly: average high 96 °F, low 66 °F 96°66° JulAugust: average high 96 °F, low 68 °F 96°68° AugSeptember: average high 89 °F, low 60 °F 89°60° SepOctober: average high 80 °F, low 50 °F 80°50° OctNovember: average high 66 °F, low 41 °F 66°41° NovDecember: average high 58 °F, low 34 °F 58°34° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″January: 1.41 in precipitation 1.4 JanFebruary: 1.22 in precipitation, 0.7 in snowfall 1.2❄1 FebMarch: 0.78 in precipitation 0.8 MarApril: 0.25 in precipitation 0.3 AprMay: 0.06 in precipitation 0.1 MayJune: 0.00 in precipitation 0.0 JunJuly: 0.46 in precipitation 0.5 JulAugust: 0.17 in precipitation 0.2 AugSeptember: 0.15 in precipitation 0.1 SepOctober: 0.61 in precipitation 0.6 OctNovember: 0.27 in precipitation, 0.1 in snowfall 0.3 NovDecember: 0.87 in precipitation, 0.9 in snowfall 0.9❄1 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Yucca Valley, CA (3 mi away); precipitation: Yucca Valley, CA (3 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.

922869a
Yucca Valley, CA · 4 mi
922689a
Pioneertown, CA · 7 mi
922529a
Joshua Tree, CA · 8 mi
922569b
Morongo Valley, CA · 13 mi
922859a
Landers, CA · 13 mi
9224010a
Desert Hot Springs, CA · 15 mi
9225810a
North Palm Springs, CA · 18 mi
922829b
Whitewater, CA · 19 mi

All 2 ZIP codes in Yucca Valley → · California planting zones →

Questions about 92284

What planting zone is ZIP code 92284?

ZIP code 92284 (Yucca Valley, CA) is in USDA hardiness zone 9a on the 2023 map: the coldest night of an average winter reaches 20 to 25 °F (−6.7 to −3.9 °C).

When is the last frost in Yucca Valley, CA?

The median last spring frost (32 °F) near 92284 is March 14; after April 1 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Yucca Valley station.

When is the first frost in Yucca Valley, CA?

The median first fall frost near 92284 is November 28, giving a median frost-free growing season of 255 days.

When should I plant tomatoes in 92284?

Start tomato seeds indoors around Jan 17 – Jan 31 and set transplants outside around Mar 21 – Apr 4, one to three weeks after the median last frost.

How much rain and snow does 92284 get?

About 6.3 inches of precipitation a year and 2 inches of snowfall (NOAA 1991–2020 normals, Yucca Valley station).

How hot do summers get in Yucca Valley, CA?

The average high peaks at 96 °F in July, with about 109 days a year at 90 °F or more.

What kind of soil does 92284 have?

The USDA soil survey maps Typic Torriorthents at the center of ZIP 92284: gravelly sandy loam, somewhat excessively drained, pH about 8.0 (alkaline).

Did spring come early in Yucca Valley, CA in 2026?

Spring leaf-out near 92284 came on Jan 27 in 2026, 7 days earlier than the 1991–2020 average (Feb 3), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Yucca Valley, CA?

Intermediate onions: the longest day near 92284 is 14 h 26 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 92284 change?

Yes. The 2012 USDA map put 92284 in zone 8b; the 2023 map puts it in zone 9a. The newer map uses 1991–2020 data and more weather stations.