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

Planting zone for 95618 — Davis, CA

ZIP code 95618 (Davis, Yolo County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F. The median last spring frost is February 10 and the first fall frost December 1.

Where ZIP 95618 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 frostFeb 10
First frostDec 1
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 Davis, 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 Davis, CA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostFebruary 10median — 50% chance of a later frost
Safe for tender plantsMarch 11only 10% chance of frost after
First fall frostDecember 1median — 10% chance by Nov 13
Growing season295 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 6 and returns around December 18.

From the NOAA station Davis 2 Wsw Exp Farm, CA — 4 miles away, elevation 59 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 95618

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Dec 30 – Jan 13
SpinachSow outdoors · Dec 30 – Jan 20
Broccoli, cabbageStart indoors · Dec 2 – Dec 16
Broccoli, cabbageTransplant · Jan 20 – Feb 3
Onion setsPlant outdoors · Jan 13 – Jan 27
PotatoesPlant outdoors · Jan 20 – Feb 3
LettuceSow outdoors · Jan 13 – Jan 27
Carrots, beetsSow outdoors · Jan 20 – Feb 3
TomatoesStart indoors · Dec 16 – Dec 30
TomatoesTransplant · Feb 17 – Mar 3
Peppers, eggplantStart indoors · Dec 2 – Dec 16
Peppers, eggplantTransplant · Feb 24 – Mar 10
BeansSow outdoors · Feb 17 – Mar 3
Sweet cornSow outdoors · Feb 17 – Mar 3
Cucumbers, squashSow outdoors · Feb 17 – Mar 3
Fall lettuce, spinachSow outdoors · Oct 6 – Oct 20
GarlicPlant cloves · Nov 17 – Dec 22
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Feb 10) and first fall frost (Dec 1) 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 95618 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 Davis, CA

The soil mapped at the center of ZIP 95618 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 groupBwater soaks in moderately
Farmland classPrime farmland if irrigatedUSDA classification

Map unit: Sycamore silt loam, drained, 0 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 95618; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Davis, CA

Summer high93 °Faverage high, July
Winter low38 °Faverage low, January
Hot days88days a year at 90 °F or more
Freezing nights18nights a year at 32 °F or less
Growing degree days4,562base 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
Precipitation21 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 38 °F 56°38° JanFebruary: average high 61 °F, low 41 °F 61°41° FebMarch: average high 66 °F, low 44 °F 66°44° MarApril: average high 73 °F, low 47 °F 73°47° AprMay: average high 81 °F, low 52 °F 81°52° MayJune: average high 89 °F, low 56 °F 89°56° JunJuly: average high 93 °F, low 57 °F 93°57° JulAugust: average high 93 °F, low 56 °F 93°56° AugSeptember: average high 90 °F, low 55 °F 90°55° SepOctober: average high 80 °F, low 50 °F 80°50° OctNovember: average high 65 °F, low 43 °F 65°43° NovDecember: average high 56 °F, low 38 °F 56°38° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 4.32 in precipitation 4.3 JanFebruary: 4.10 in precipitation 4.1 FebMarch: 2.85 in precipitation 2.9 MarApril: 1.36 in precipitation 1.4 AprMay: 0.79 in precipitation 0.8 MayJune: 0.22 in precipitation 0.2 JunJuly: 0.00 in precipitation 0.0 JulAugust: 0.03 in precipitation 0.0 AugSeptember: 0.18 in precipitation 0.2 SepOctober: 0.84 in precipitation 0.8 OctNovember: 2.16 in precipitation 2.2 NovDecember: 4.18 in precipitation 4.2 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Davis 2 Wsw Exp Farm, CA (4 mi away); precipitation: Davis 1.2 Se, CA (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 9b.

956179b
Davis, CA · 2 mi
956169b
Davis, CA · 6 mi
957999b
West Sacramento, CA · 7 mi
958999b
Sacramento, CA · 7 mi
956919b
West Sacramento, CA · 8 mi
956059b
West Sacramento, CA · 9 mi
957989b
West Sacramento, CA · 9 mi
958319b
Sacramento, CA · 9 mi

All 3 ZIP codes in Davis → · California planting zones →

Questions about 95618

What planting zone is ZIP code 95618?

ZIP code 95618 (Davis, 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).

When is the last frost in Davis, CA?

The median last spring frost (32 °F) near 95618 is February 10; after March 11 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Davis 2 Wsw Exp Farm station.

When is the first frost in Davis, CA?

The median first fall frost near 95618 is December 1, giving a median frost-free growing season of 295 days.

When should I plant tomatoes in 95618?

Start tomato seeds indoors around Dec 16 – Dec 30 and set transplants outside around Feb 17 – Mar 3, one to three weeks after the median last frost.

How much rain and snow does 95618 get?

About 21 inches of precipitation a year (NOAA 1991–2020 normals, Davis 1.2 Se station).

How hot do summers get in Davis, CA?

The average high peaks at 93 °F in July, with about 88 days a year at 90 °F or more.

What kind of soil does 95618 have?

The USDA soil survey maps Sycamore at the center of ZIP 95618: silt loam, somewhat poorly drained, pH about 6.5 (neutral).

Did spring come early in Davis, CA in 2026?

Spring leaf-out near 95618 came on Jan 31 in 2026, about the same as the 1991–2020 average (Jan 31), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Davis, CA?

Intermediate onions: the longest day near 95618 is 14 h 52 min, so day-neutral types bulb best; long-day varieties may not bulb fully.