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

Planting zone for West Sacramento, CA

West Sacramento, CA is in USDA zone 9b across its 4 ZIP codes. The median last spring frost is February 2 and the first fall frost December 2.

West Sacramento on the zone map

Outlined: its 2 ZIP code areas · 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
ZIP codes4
Last frostFeb 2
First frostDec 2
Growing season301 days

9b 4 ZIPs

Frost forecast — next 7 nights

live from the National Weather Service

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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 West Sacramento, CA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostFebruary 2median — 50% chance of a later frost
Safe for tender plantsMarch 5only 10% chance of frost after
First fall frostDecember 2median — 10% chance by Nov 16
Growing season301 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 4 and returns around December 16.

From the NOAA station Sacramento Executive Airport, CA, elevation 16 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 West Sacramento

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Dec 22 – Jan 5
SpinachSow outdoors · Dec 22 – Jan 12
Broccoli, cabbageStart indoors · Nov 24 – Dec 8
Broccoli, cabbageTransplant · Jan 12 – Jan 26
Onion setsPlant outdoors · Jan 5 – Jan 19
PotatoesPlant outdoors · Jan 12 – Jan 26
LettuceSow outdoors · Jan 5 – Jan 19
Carrots, beetsSow outdoors · Jan 12 – Jan 26
TomatoesStart indoors · Dec 8 – Dec 22
TomatoesTransplant · Feb 9 – Feb 23
Peppers, eggplantStart indoors · Nov 24 – Dec 8
Peppers, eggplantTransplant · Feb 16 – Mar 2
BeansSow outdoors · Feb 9 – Feb 23
Sweet cornSow outdoors · Feb 9 – Feb 23
Cucumbers, squashSow outdoors · Feb 9 – Feb 23
Fall lettuce, spinachSow outdoors · Oct 7 – Oct 21
GarlicPlant cloves · Nov 18 – Dec 23
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Feb 2) and first fall frost (Dec 2) 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 95605 came on Jan 31 — about the same time as the 1991–2020 average (Jan 31).

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 West Sacramento, CA

The soil mapped at the center of ZIP 95605 is Sycamore — silt loam, somewhat poorly drained.

TextureSilt loama good balance for most vegetables
pH6.5neutral; most vegetables like 6.0–7.0
DrainageSomewhat poorly drainedconsider raised beds
Organic matter2.2%moderate
Hydrologic groupCwater soaks in slowly
Farmland classPrime farmland if irrigated and drainedUSDA classification

Map unit: Sycamore silt loam, 0 to 1 percent slopes, MLRA 17.

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 95605; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in West Sacramento, CA

Summer high93 °Faverage high, July
Winter low39 °Faverage low, January
Hot days76days a year at 90 °F or more
Freezing nights15nights a year at 32 °F or less
Growing degree days4,621base 50 °F — the season’s usable heat
Longest day14 h 52 mindaylight on June 21
Shortest day9 h 28 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation20.4 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°90°100°32 °FJanuary: average high 56 °F, low 39 °F 56°39° JanFebruary: average high 61 °F, low 42 °F 61°42° FebMarch: average high 66 °F, low 45 °F 66°45° MarApril: average high 72 °F, low 47 °F 72°47° AprMay: average high 80 °F, low 52 °F 80°52° MayJune: average high 88 °F, low 57 °F 88°57° JunJuly: average high 93 °F, low 59 °F 93°59° JulAugust: average high 92 °F, low 59 °F 92°59° AugSeptember: average high 89 °F, low 57 °F 89°57° SepOctober: average high 79 °F, low 50 °F 79°50° OctNovember: average high 65 °F, low 43 °F 65°43° NovDecember: average high 56 °F, low 39 °F 56°39° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 4.10 in precipitation 4.1 JanFebruary: 3.77 in precipitation 3.8 FebMarch: 3.00 in precipitation 3.0 MarApril: 1.50 in precipitation 1.5 AprMay: 0.89 in precipitation 0.9 MayJune: 0.22 in precipitation 0.2 JunJuly: 0.00 in precipitation 0.0 JulAugust: 0.03 in precipitation 0.0 AugSeptember: 0.14 in precipitation 0.1 SepOctober: 0.87 in precipitation 0.9 OctNovember: 1.94 in precipitation 1.9 NovDecember: 3.95 in precipitation 4.0 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Sacramento Executive Airport, CA (6 mi away); precipitation: Sacramento 2.0 Se, CA (6 mi away). Daylight is calculated from latitude.

ZIP codes in West Sacramento

956059b
25 to 30 °F
956919b
25 to 30 °F
957989b
25 to 30 °F
957999b
25 to 30 °F

California planting zones →

Questions about West Sacramento

What planting zone is West Sacramento, CA?

West Sacramento, CA is in USDA hardiness zone 9b on the 2023 map (9b: 25 to 30 °F).

When is the last frost in West Sacramento, CA?

The median last spring frost is February 2 and the median first fall frost is December 2 (NOAA 1991–2020 normals, Sacramento Executive Airport station).

When can I plant a garden in West Sacramento, CA?

Cool-season crops like peas and spinach go in around Dec 22 – Jan 12; tomatoes, peppers, beans and squash after about Feb 9, once frost risk has passed.

What kind of onions grow in West Sacramento, CA?

Intermediate onions: the longest day is 14 h 52 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

How much rain and snow does West Sacramento, CA get?

About 20.4 inches of precipitation a year (NOAA 1991–2020 normals).