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

Planting zone for 93563 — Valyermo, CA

ZIP code 93563 (Valyermo, Los Angeles County) is in USDA zone 8a: the coldest winter night averages 10 to 15 °F. The median last spring frost is May 16 and the first fall frost October 13.

Where ZIP 93563 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.

Zone8a10 to 15 °F
Coldest night−12.2 to −9.4 °C
Last frostMay 16
First frostOct 13
2012 zone8a

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 8a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Valyermo, 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 Valyermo, CA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 16median — 50% chance of a later frost
Safe for tender plantsJune 9only 10% chance of frost after
First fall frostOctober 13median — 10% chance by Sep 25
Growing season151 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 25 and returns around October 30.

From the NOAA station Wrightwood, CA — 10 miles away, elevation 6,001 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 93563

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Apr 4 – Apr 18
SpinachSow outdoors · Apr 4 – Apr 25
Broccoli, cabbageStart indoors · Mar 7 – Mar 21
Broccoli, cabbageTransplant · Apr 25 – May 9
Onion setsPlant outdoors · Apr 18 – May 2
PotatoesPlant outdoors · Apr 25 – May 9
LettuceSow outdoors · Apr 18 – May 2
Carrots, beetsSow outdoors · Apr 25 – May 9
TomatoesStart indoors · Mar 21 – Apr 4
TomatoesTransplant · May 23 – Jun 6
Peppers, eggplantStart indoors · Mar 7 – Mar 21
Peppers, eggplantTransplant · May 30 – Jun 13
BeansSow outdoors · May 23 – Jun 6
Sweet cornSow outdoors · May 23 – Jun 6
Cucumbers, squashSow outdoors · May 23 – Jun 6
Fall lettuce, spinachSow outdoors · Aug 18 – Sep 1
GarlicPlant cloves · Sep 29 – Nov 3
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 16) and first fall frost (Oct 13) 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 93563 came on Feb 15 — 13 days earlier than the 1991–2020 average (Feb 28).

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 Valyermo, CA

The soil mapped at the center of ZIP 93563 is Bakeoven family — gravelly loam, well drained.

TextureGravelly loama good balance for most vegetables
pH6.6neutral; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1%low — add compost
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Bakeoven-Sur, moderately deep families complex, 50 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 93563; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Valyermo, CA

Summer high83 °Faverage high, July
Winter low25 °Faverage low, February
Hot days4days a year at 90 °F or more
Freezing nights159nights a year at 32 °F or less
Growing degree days2,050base 50 °F — the season’s usable heat
Longest day14 h 27 mindaylight on June 21
Shortest day9 h 51 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation30.4 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 48 °F, low 26 °F 48°26° JanFebruary: average high 48 °F, low 25 °F 48°25° FebMarch: average high 54 °F, low 29 °F 54°29° MarApril: average high 60 °F, low 32 °F 60°32° AprMay: average high 69 °F, low 39 °F 69°39° MayJune: average high 78 °F, low 44 °F 78°44° JunJuly: average high 83 °F, low 53 °F 83°53° JulAugust: average high 82 °F, low 51 °F 82°51° AugSeptember: average high 75 °F, low 46 °F 75°46° SepOctober: average high 64 °F, low 37 °F 64°37° OctNovember: average high 55 °F, low 29 °F 55°29° NovDecember: average high 48 °F, low 25 °F 48°25° Dec

Precipitation by month inches

0″2″4″6″8″January: 7.12 in precipitation 7.1 JanFebruary: 7.51 in precipitation 7.5 FebMarch: 4.62 in precipitation 4.6 MarApril: 2.17 in precipitation 2.2 AprMay: 0.94 in precipitation 0.9 MayJune: 0.30 in precipitation 0.3 JunJuly: 0.22 in precipitation 0.2 JulAugust: 0.21 in precipitation 0.2 AugSeptember: 0.15 in precipitation 0.1 SepOctober: 0.97 in precipitation 1.0 OctNovember: 1.76 in precipitation 1.8 NovDecember: 4.48 in precipitation 4.5 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Wrightwood, CA (10 mi away); precipitation: Crystal Lake Fc238c, CA (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

923977b
Wrightwood, CA · 4 mi
917029b
Azusa, CA · 6 mi
935538b
Pearblossom, CA · 7 mi
935448b
Llano, CA · 9 mi
917598a
Mount Baldy, CA · 10 mi
935438b
Littlerock, CA · 11 mi
923728b
Pinon Hills, CA · 12 mi
923298b
Phelan, CA · 14 mi

California planting zones →

Questions about 93563

What planting zone is ZIP code 93563?

ZIP code 93563 (Valyermo, CA) is in USDA hardiness zone 8a on the 2023 map: the coldest night of an average winter reaches 10 to 15 °F (−12.2 to −9.4 °C).

When is the last frost in Valyermo, CA?

The median last spring frost (32 °F) near 93563 is May 16; after June 9 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Wrightwood station.

When is the first frost in Valyermo, CA?

The median first fall frost near 93563 is October 13, giving a median frost-free growing season of 151 days.

When should I plant tomatoes in 93563?

Start tomato seeds indoors around Mar 21 – Apr 4 and set transplants outside around May 23 – Jun 6, one to three weeks after the median last frost.

How much rain and snow does 93563 get?

About 30.4 inches of precipitation a year (NOAA 1991–2020 normals, Crystal Lake Fc238c station).

How hot do summers get in Valyermo, CA?

The average high peaks at 83 °F in July, with about 4 days a year at 90 °F or more.

What kind of soil does 93563 have?

The USDA soil survey maps Bakeoven family at the center of ZIP 93563: gravelly loam, well drained, pH about 6.6 (neutral).

Did spring come early in Valyermo, CA in 2026?

Spring leaf-out near 93563 came on Feb 15 in 2026, 13 days earlier than the 1991–2020 average (Feb 28), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Valyermo, CA?

Intermediate onions: the longest day near 93563 is 14 h 27 min, so day-neutral types bulb best; long-day varieties may not bulb fully.