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

Planting zone for 95134 — San Jose, CA

ZIP code 95134 (San Jose, Santa Clara County) is in USDA zone 10a: the coldest winter night averages 30 to 35 °F.

Where ZIP 95134 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.

Zone10a30 to 35 °F
Coldest night−1.1 to 1.7 °C
Last frostrare
First frostrare
2012 zone10a

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 10a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for San Jose, 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 San Jose, CA — 5 miles away, elevation 52 ft) the median growing season is 347 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 95134 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 San Jose, CA

The soil mapped at the center of ZIP 95134 is Campbell — silt loam, moderately well drained.

TextureSilt loama good balance for most vegetables
pH7.1neutral; most vegetables like 6.0–7.0
DrainageModerately well drainednatural drainage class
Organic matter3.4%moderate
Hydrologic groupCwater soaks in slowly
Farmland classPrime farmland if irrigatedUSDA classification

Map unit: Campbell silt loam, 0 to 2 percent slopes, protected.

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 95134; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in San Jose, CA

Summer high81 °Faverage high, July
Winter low42 °Faverage low, January
Hot days16days a year at 90 °F or more
Freezing nights3nights a year at 32 °F or less
Growing degree days4,040base 50 °F — the season’s usable heat
Longest day14 h 45 mindaylight on June 21
Shortest day9 h 35 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation13.5 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°90°32 °FJanuary: average high 60 °F, low 42 °F 60°42° JanFebruary: average high 62 °F, low 44 °F 62°44° FebMarch: average high 66 °F, low 46 °F 66°46° MarApril: average high 69 °F, low 48 °F 69°48° AprMay: average high 74 °F, low 52 °F 74°52° MayJune: average high 79 °F, low 56 °F 79°56° JunJuly: average high 81 °F, low 58 °F 81°58° JulAugust: average high 81 °F, low 59 °F 81°59° AugSeptember: average high 81 °F, low 57 °F 81°57° SepOctober: average high 76 °F, low 53 °F 76°53° OctNovember: average high 66 °F, low 46 °F 66°46° NovDecember: average high 60 °F, low 42 °F 60°42° Dec

Precipitation by month inches

0″1″2″3″January: 2.80 in precipitation 2.8 JanFebruary: 2.69 in precipitation 2.7 FebMarch: 2.08 in precipitation 2.1 MarApril: 1.07 in precipitation 1.1 AprMay: 0.39 in precipitation 0.4 MayJune: 0.18 in precipitation 0.2 JunJuly: 0.00 in precipitation 0.0 JulAugust: 0.05 in precipitation 0.1 AugSeptember: 0.07 in precipitation 0.1 SepOctober: 0.53 in precipitation 0.5 OctNovember: 1.33 in precipitation 1.3 NovDecember: 2.29 in precipitation 2.3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: San Jose, CA (5 mi away); precipitation: San Jose, CA (5 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

9503610a
Milpitas, CA · 2 mi
9505610a
Santa Clara, CA · 2 mi
9505410a
Santa Clara, CA · 3 mi
951649b
San Jose, CA · 3 mi
9500210a
Alviso, CA · 4 mi
9513110a
San Jose, CA · 4 mi
9503510a
Milpitas, CA · 4 mi
951509b
San Jose, CA · 4 mi

All 55 ZIP codes in San Jose → · California planting zones →

Questions about 95134

What planting zone is ZIP code 95134?

ZIP code 95134 (San Jose, CA) is in USDA hardiness zone 10a on the 2023 map: the coldest night of an average winter reaches 30 to 35 °F (−1.1 to 1.7 °C).

How much rain and snow does 95134 get?

About 13.5 inches of precipitation a year (NOAA 1991–2020 normals, San Jose station).

How hot do summers get in San Jose, CA?

The average high peaks at 81 °F in July, with about 16 days a year at 90 °F or more.

What kind of soil does 95134 have?

The USDA soil survey maps Campbell at the center of ZIP 95134: silt loam, moderately well drained, pH about 7.1 (neutral).

Did spring come early in San Jose, CA in 2026?

Spring leaf-out near 95134 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 San Jose, CA?

Intermediate onions: the longest day near 95134 is 14 h 45 min, so day-neutral types bulb best; long-day varieties may not bulb fully.