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

Planting zone for 93306 — Bakersfield, CA

ZIP code 93306 (Bakersfield, Kern County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F.

Where ZIP 93306 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 zone10a

Was 10a on the 2012 map — half a zone colder now. 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 Bakersfield, 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 Bakersfield Airport, CA — 16 miles away, elevation 489 ft) the median growing season is 334 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 93306 came on Jan 24 — 6 days earlier than the 1991–2020 average (Jan 30).

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 Bakersfield, CA

The soil mapped at the center of ZIP 93306 is Cieneba — stony sandy loam, somewhat excessively drained.

TextureStony sandy loamdrains and warms fast; dries out and needs more feeding
pH6.5neutral; most vegetables like 6.0–7.0
DrainageSomewhat excessively drainednatural drainage class
Organic matter0.75%low — add compost
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Cieneba-Vista-Rock outcrop complex, 30 to 60 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 93306; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Bakersfield, CA

Summer high98 °Faverage high, July
Winter low40 °Faverage low, December
Hot days112days a year at 90 °F or more
Freezing nights10nights a year at 32 °F or less
Growing degree days6,145base 50 °F — the season’s usable heat
Longest day14 h 33 mindaylight on June 21
Shortest day9 h 45 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation6.4 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 59 °F, low 41 °F 59°41° JanFebruary: average high 64 °F, low 43 °F 64°43° FebMarch: average high 70 °F, low 47 °F 70°47° MarApril: average high 76 °F, low 51 °F 76°51° AprMay: average high 84 °F, low 58 °F 84°58° MayJune: average high 92 °F, low 65 °F 92°65° JunJuly: average high 98 °F, low 71 °F 98°71° JulAugust: average high 97 °F, low 70 °F 97°70° AugSeptember: average high 91 °F, low 65 °F 91°65° SepOctober: average high 80 °F, low 55 °F 80°55° OctNovember: average high 67 °F, low 45 °F 67°45° NovDecember: average high 59 °F, low 40 °F 59°40° Dec

Precipitation by month inches

0″1″2″January: 1.19 in precipitation, 0.1 in snowfall 1.2 JanFebruary: 1.18 in precipitation 1.2 FebMarch: 1.15 in precipitation 1.1 MarApril: 0.60 in precipitation 0.6 AprMay: 0.25 in precipitation 0.3 MayJune: 0.05 in precipitation 0.1 JunJuly: 0.00 in precipitation 0.0 JulAugust: 0.00 in precipitation 0.0 AugSeptember: 0.05 in precipitation 0.1 SepOctober: 0.28 in precipitation 0.3 OctNovember: 0.51 in precipitation 0.5 NovDecember: 1.10 in precipitation 1.1 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Bakersfield Airport, CA (16 mi away); precipitation: Bakersfield Airport, CA (16 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 9b.

932209b
Edison, CA · 6 mi
933089b
Bakersfield, CA · 11 mi
933059b
Bakersfield, CA · 13 mi
933039b
Bakersfield, CA · 14 mi
933809b
Bakersfield, CA · 14 mi
933839b
Bakersfield, CA · 14 mi
933859b
Bakersfield, CA · 14 mi
933869b
Bakersfield, CA · 14 mi

All 22 ZIP codes in Bakersfield → · California planting zones →

Questions about 93306

What planting zone is ZIP code 93306?

ZIP code 93306 (Bakersfield, 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 93306 get?

About 6.4 inches of precipitation a year (NOAA 1991–2020 normals, Bakersfield Airport station).

How hot do summers get in Bakersfield, CA?

The average high peaks at 98 °F in July, with about 112 days a year at 90 °F or more.

What kind of soil does 93306 have?

The USDA soil survey maps Cieneba at the center of ZIP 93306: stony sandy loam, somewhat excessively drained, pH about 6.5 (neutral).

Did spring come early in Bakersfield, CA in 2026?

Spring leaf-out near 93306 came on Jan 24 in 2026, 6 days earlier than the 1991–2020 average (Jan 30), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Bakersfield, CA?

Intermediate onions: the longest day near 93306 is 14 h 33 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 93306 change?

Yes. The 2012 USDA map put 93306 in zone 10a; the 2023 map puts it in zone 9b. The newer map uses 1991–2020 data and more weather stations.