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

Planting zone for 95435 — Finley, CA

ZIP code 95435 (Finley, Lake County) is in USDA zone 8b: the coldest winter night averages 15 to 20 °F. The median last spring frost is February 25 and the first fall frost December 3.

Where ZIP 95435 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.

Zone8b15 to 20 °F
Coldest night−9.4 to −6.7 °C
Last frostFeb 25
First frostDec 3
2012 zone9a

Was 9a 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 8b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Finley, 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 Finley, CA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostFebruary 25median — 50% chance of a later frost
Safe for tender plantsApril 2only 10% chance of frost after
First fall frostDecember 3median — 10% chance by Nov 14
Growing season279 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 12 and returns around December 19.

From the NOAA station Cloverdale, CA — 17 miles away, elevation 400 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 95435

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Jan 14 – Jan 28
SpinachSow outdoors · Jan 14 – Feb 4
Broccoli, cabbageStart indoors · Dec 17 – Dec 31
Broccoli, cabbageTransplant · Feb 4 – Feb 18
Onion setsPlant outdoors · Jan 28 – Feb 11
PotatoesPlant outdoors · Feb 4 – Feb 18
LettuceSow outdoors · Jan 28 – Feb 11
Carrots, beetsSow outdoors · Feb 4 – Feb 18
TomatoesStart indoors · Dec 31 – Jan 14
TomatoesTransplant · Mar 4 – Mar 18
Peppers, eggplantStart indoors · Dec 17 – Dec 31
Peppers, eggplantTransplant · Mar 11 – Mar 25
BeansSow outdoors · Mar 4 – Mar 18
Sweet cornSow outdoors · Mar 4 – Mar 18
Cucumbers, squashSow outdoors · Mar 4 – Mar 18
Fall lettuce, spinachSow outdoors · Oct 8 – Oct 22
GarlicPlant cloves · Nov 19 – Dec 24
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Feb 25) and first fall frost (Dec 3) 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 95435 came on Jan 31 — 6 days earlier than the 1991–2020 average (Feb 6).

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 Finley, CA

The soil mapped at the center of ZIP 95435 is Cole — clay loam, somewhat poorly drained.

TextureClay loamholds water and nutrients; slow to drain and warm up
pH6.5neutral; most vegetables like 6.0–7.0
DrainageSomewhat poorly drainedconsider raised beds
Organic matter2.5%moderate
Hydrologic groupCwater soaks in slowly
Farmland classPrime farmland if irrigatedUSDA classification

Map unit: Cole clay loam, drained.

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 95435; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Finley, CA

Summer high94 °Faverage high, July
Winter low38 °Faverage low, January
Hot days84days a year at 90 °F or more
Freezing nights13nights a year at 32 °F or less
Growing degree days4,557base 50 °F — the season’s usable heat
Longest day14 h 54 mindaylight on June 21
Shortest day9 h 25 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation39.6 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°90°100°32 °FJanuary: average high 60 °F, low 38 °F 60°38° JanFebruary: average high 63 °F, low 40 °F 63°40° FebMarch: average high 68 °F, low 42 °F 68°42° MarApril: average high 74 °F, low 45 °F 74°45° AprMay: average high 82 °F, low 50 °F 82°50° MayJune: average high 89 °F, low 54 °F 89°54° JunJuly: average high 94 °F, low 55 °F 94°55° JulAugust: average high 93 °F, low 55 °F 93°55° AugSeptember: average high 90 °F, low 54 °F 90°54° SepOctober: average high 81 °F, low 49 °F 81°49° OctNovember: average high 67 °F, low 42 °F 67°42° NovDecember: average high 59 °F, low 38 °F 59°38° Dec

Precipitation by month inches

0″2″4″6″8″January: 7.41 in precipitation 7.4 JanFebruary: 7.15 in precipitation 7.2 FebMarch: 5.47 in precipitation 5.5 MarApril: 2.64 in precipitation 2.6 AprMay: 1.49 in precipitation 1.5 MayJune: 0.41 in precipitation 0.4 JunJuly: 0.11 in precipitation 0.1 JulAugust: 0.05 in precipitation 0.1 AugSeptember: 0.17 in precipitation 0.2 SepOctober: 1.77 in precipitation 1.8 OctNovember: 4.24 in precipitation 4.2 NovDecember: 8.68 in precipitation 8.7 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Cloverdale, CA (17 mi away); precipitation: Upper Lake 3.6 W, CA (12 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

954538b
Lakeport, CA · 5 mi
954519b
Kelseyville, CA · 7 mi
954439b
Glenhaven, CA · 8 mi
954648b
Nice, CA · 9 mi
954589a
Lucerne, CA · 9 mi
954249a
Clearlake Park, CA · 12 mi
954229a
Clearlake, CA · 13 mi
954239a
Clearlake Oaks, CA · 14 mi

California planting zones →

Questions about 95435

What planting zone is ZIP code 95435?

ZIP code 95435 (Finley, CA) is in USDA hardiness zone 8b on the 2023 map: the coldest night of an average winter reaches 15 to 20 °F (−9.4 to −6.7 °C).

When is the last frost in Finley, CA?

The median last spring frost (32 °F) near 95435 is February 25; after April 2 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Cloverdale station.

When is the first frost in Finley, CA?

The median first fall frost near 95435 is December 3, giving a median frost-free growing season of 279 days.

When should I plant tomatoes in 95435?

Start tomato seeds indoors around Dec 31 – Jan 14 and set transplants outside around Mar 4 – Mar 18, one to three weeks after the median last frost.

How much rain and snow does 95435 get?

About 39.6 inches of precipitation a year (NOAA 1991–2020 normals, Upper Lake 3.6 W station).

How hot do summers get in Finley, CA?

The average high peaks at 94 °F in July, with about 84 days a year at 90 °F or more.

What kind of soil does 95435 have?

The USDA soil survey maps Cole at the center of ZIP 95435: clay loam, somewhat poorly drained, pH about 6.5 (neutral).

Did spring come early in Finley, CA in 2026?

Spring leaf-out near 95435 came on Jan 31 in 2026, 6 days earlier than the 1991–2020 average (Feb 6), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Finley, CA?

Intermediate onions: the longest day near 95435 is 14 h 54 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 95435 change?

Yes. The 2012 USDA map put 95435 in zone 9a; the 2023 map puts it in zone 8b. The newer map uses 1991–2020 data and more weather stations.