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

Planting zone for 91387 — Canyon Country, CA

ZIP code 91387 (Canyon Country, Los Angeles County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F.

Where ZIP 91387 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.

Zone9b25 to 30 °F
Coldest night−3.9 to −1.1 °C
Last frostrare
First frostrare
2012 zone9b

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 9b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Canyon Country, 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 Newhall 5nw, CA — 13 miles away, elevation 1,765 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 91387 came on Jan 18 — 8 days earlier than the 1991–2020 average (Jan 26).

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 Canyon Country, CA

The soil mapped at the center of ZIP 91387 is Caperton 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: Caperton-Trigo, granitic substratum-Lodo families complex, 50 to 85 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 91387; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Canyon Country, CA

Summer high96 °Faverage high, August
Winter low44 °Faverage low, December
Hot days87days a year at 90 °F or more
Freezing nights1nights a year at 32 °F or less
Growing degree days5,822base 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
Precipitation15.5 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°90°100°110°32 °FJanuary: average high 63 °F, low 47 °F 63°47° JanFebruary: average high 65 °F, low 45 °F 65°45° FebMarch: average high 70 °F, low 47 °F 70°47° MarApril: average high 74 °F, low 49 °F 74°49° AprMay: average high 81 °F, low 54 °F 81°54° MayJune: average high 87 °F, low 57 °F 87°57° JunJuly: average high 94 °F, low 63 °F 94°63° JulAugust: average high 96 °F, low 64 °F 96°64° AugSeptember: average high 91 °F, low 62 °F 91°62° SepOctober: average high 81 °F, low 56 °F 81°56° OctNovember: average high 71 °F, low 49 °F 71°49° NovDecember: average high 62 °F, low 44 °F 62°44° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 3.22 in precipitation 3.2 JanFebruary: 4.21 in precipitation 4.2 FebMarch: 2.75 in precipitation 2.8 MarApril: 0.86 in precipitation 0.9 AprMay: 0.40 in precipitation 0.4 MayJune: 0.09 in precipitation 0.1 JunJuly: 0.06 in precipitation 0.1 JulAugust: 0.03 in precipitation 0.0 AugSeptember: 0.15 in precipitation 0.1 SepOctober: 0.67 in precipitation 0.7 OctNovember: 0.83 in precipitation 0.8 NovDecember: 2.27 in precipitation 2.3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Newhall 5nw, CA (13 mi away); precipitation: Canyon Country 2.6 E, CA (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

9134210a
Sylmar, CA · 5 mi
9135110a
Canyon Country, CA · 6 mi
9138610a
Canyon Country, CA · 6 mi
9132110a
Newhall, CA · 8 mi
9139210a
Sylmar, CA · 8 mi
9135010a
Santa Clarita, CA · 8 mi
9104210a
Tujunga, CA · 8 mi
935109a
Acton, CA · 8 mi

All 3 ZIP codes in Canyon Country → · California planting zones →

Questions about 91387

What planting zone is ZIP code 91387?

ZIP code 91387 (Canyon Country, CA) is in USDA hardiness zone 9b on the 2023 map: the coldest night of an average winter reaches 25 to 30 °F (−3.9 to −1.1 °C).

How much rain and snow does 91387 get?

About 15.5 inches of precipitation a year (NOAA 1991–2020 normals, Canyon Country 2.6 E station).

How hot do summers get in Canyon Country, CA?

The average high peaks at 96 °F in August, with about 87 days a year at 90 °F or more.

What kind of soil does 91387 have?

The USDA soil survey maps Caperton family at the center of ZIP 91387: gravelly loam, well drained, pH about 6.6 (neutral).

Did spring come early in Canyon Country, CA in 2026?

Spring leaf-out near 91387 came on Jan 18 in 2026, 8 days earlier than the 1991–2020 average (Jan 26), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Canyon Country, CA?

Intermediate onions: the longest day near 91387 is 14 h 27 min, so day-neutral types bulb best; long-day varieties may not bulb fully.