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

Planting zone for 94605 — Oakland, CA

ZIP code 94605 (Oakland, Alameda County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F.

Where ZIP 94605 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 Oakland, 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 Oakland Metro Intl Airport, CA — 5 miles away, elevation 7 ft) the median growing season is 356 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 94605 came on Jan 24 — 3 days earlier than the 1991–2020 average (Jan 27).

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 Oakland, CA

The soil mapped at the center of ZIP 94605 is Climara — clay, well drained.

TextureClayholds water and nutrients; slow to drain and warm up
pH7.5slightly alkaline; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupCwater soaks in slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Climara clay, 30 to 50 percent slopes, MLRA 15.

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 94605; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Oakland, CA

Summer high74 °Faverage high, September
Winter low42 °Faverage low, January
Hot days6days a year at 90 °F or more
Freezing nights3nights a year at 32 °F or less
Growing degree days3,106base 50 °F — the season’s usable heat
Longest day14 h 47 mindaylight on June 21
Shortest day9 h 33 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation25.3 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°32 °FJanuary: average high 58 °F, low 42 °F 58°42° JanFebruary: average high 60 °F, low 45 °F 60°45° FebMarch: average high 63 °F, low 47 °F 63°47° MarApril: average high 66 °F, low 49 °F 66°49° AprMay: average high 68 °F, low 52 °F 68°52° MayJune: average high 71 °F, low 54 °F 71°54° JunJuly: average high 72 °F, low 56 °F 72°56° JulAugust: average high 72 °F, low 57 °F 72°57° AugSeptember: average high 74 °F, low 56 °F 74°56° SepOctober: average high 72 °F, low 51 °F 72°51° OctNovember: average high 64 °F, low 46 °F 64°46° NovDecember: average high 58 °F, low 42 °F 58°42° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 4.57 in precipitation 4.6 JanFebruary: 4.68 in precipitation 4.7 FebMarch: 3.72 in precipitation 3.7 MarApril: 1.89 in precipitation 1.9 AprMay: 0.91 in precipitation 0.9 MayJune: 0.24 in precipitation 0.2 JunJuly: 0.00 in precipitation 0.0 JulAugust: 0.05 in precipitation 0.1 AugSeptember: 0.14 in precipitation 0.1 SepOctober: 1.22 in precipitation 1.2 OctNovember: 2.71 in precipitation 2.7 NovDecember: 5.12 in precipitation 5.1 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Oakland Metro Intl Airport, CA (5 mi away); precipitation: Upper San Leandro Filters, CA (within 1 mile). 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.

9460310a
Oakland, CA · 2 mi
9461910a
Oakland, CA · 2 mi
9461310a
Oakland, CA · 2 mi
945469b
Castro Valley, CA · 3 mi
9457710a
San Leandro, CA · 3 mi
9462110a
Oakland, CA · 3 mi
9461410a
Oakland, CA · 4 mi
9460110a
Oakland, CA · 4 mi

All 26 ZIP codes in Oakland → · California planting zones →

Questions about 94605

What planting zone is ZIP code 94605?

ZIP code 94605 (Oakland, 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 94605 get?

About 25.3 inches of precipitation a year (NOAA 1991–2020 normals, Upper San Leandro Filters station).

How hot do summers get in Oakland, CA?

The average high peaks at 74 °F in September, with about 6 days a year at 90 °F or more.

What kind of soil does 94605 have?

The USDA soil survey maps Climara at the center of ZIP 94605: clay, well drained, pH about 7.5 (slightly alkaline).

Did spring come early in Oakland, CA in 2026?

Spring leaf-out near 94605 came on Jan 24 in 2026, 3 days earlier than the 1991–2020 average (Jan 27), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Oakland, CA?

Intermediate onions: the longest day near 94605 is 14 h 47 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 94605 change?

Yes. The 2012 USDA map put 94605 in zone 10a; the 2023 map puts it in zone 9b. The newer map uses 1991–2020 data and more weather stations.