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

Planting zone for 95323 — Hickman, CA

ZIP code 95323 (Hickman, Stanislaus County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F.

Where ZIP 95323 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 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 Hickman, 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 Turlock #2, CA — 11 miles away, elevation 102 ft) the median growing season is 351 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 95323 came on Jan 31 — about the same time as the 1991–2020 average (Feb 1).

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 Hickman, CA

The soil mapped at the center of ZIP 95323 is Whitney — sandy loam, well drained.

TextureSandy loamdrains and warms fast; dries out and needs more feeding
pH6.7neutral; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter0.75%low — add compost
Hydrologic groupCwater soaks in slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Whitney sandy loams, 8 to 15 percent slopes, eroded.

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 95323; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Hickman, CA

Summer high93 °Faverage high, July
Winter low42 °Faverage low, January
Hot days80days a year at 90 °F or more
Freezing nights7nights a year at 32 °F or less
Growing degree days5,351base 50 °F — the season’s usable heat
Longest day14 h 46 mindaylight on June 21
Shortest day9 h 34 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation12.4 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°90°100°32 °FJanuary: average high 55 °F, low 42 °F 55°42° JanFebruary: average high 61 °F, low 45 °F 61°45° FebMarch: average high 67 °F, low 49 °F 67°49° MarApril: average high 72 °F, low 52 °F 72°52° AprMay: average high 80 °F, low 57 °F 80°57° MayJune: average high 88 °F, low 62 °F 88°62° JunJuly: average high 93 °F, low 66 °F 93°66° JulAugust: average high 92 °F, low 65 °F 92°65° AugSeptember: average high 88 °F, low 62 °F 88°62° SepOctober: average high 77 °F, low 55 °F 77°55° OctNovember: average high 64 °F, low 47 °F 64°47° NovDecember: average high 55 °F, low 42 °F 55°42° Dec

Precipitation by month inches

0″1″2″3″January: 2.63 in precipitation 2.6 JanFebruary: 2.29 in precipitation 2.3 FebMarch: 1.85 in precipitation 1.9 MarApril: 0.93 in precipitation 0.9 AprMay: 0.59 in precipitation 0.6 MayJune: 0.12 in precipitation 0.1 JunJuly: 0.00 in precipitation 0.0 JulAugust: 0.01 in precipitation 0.0 AugSeptember: 0.03 in precipitation 0.0 SepOctober: 0.61 in precipitation 0.6 OctNovember: 1.07 in precipitation 1.1 NovDecember: 2.26 in precipitation 2.3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Turlock #2, CA (11 mi away); precipitation: Turlock #2, CA (11 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 9b.

953169b
Denair, CA · 5 mi
953869b
Waterford, CA · 5 mi
953039b
Ballico, CA · 9 mi
953269b
Hughson, CA · 9 mi
953829b
Turlock, CA · 11 mi
953199b
Empire, CA · 11 mi
953819b
Turlock, CA · 11 mi
953579b
Modesto, CA · 12 mi

California planting zones →

Questions about 95323

What planting zone is ZIP code 95323?

ZIP code 95323 (Hickman, 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 95323 get?

About 12.4 inches of precipitation a year (NOAA 1991–2020 normals, Turlock #2 station).

How hot do summers get in Hickman, CA?

The average high peaks at 93 °F in July, with about 80 days a year at 90 °F or more.

What kind of soil does 95323 have?

The USDA soil survey maps Whitney at the center of ZIP 95323: sandy loam, well drained, pH about 6.7 (neutral).

Did spring come early in Hickman, CA in 2026?

Spring leaf-out near 95323 came on Jan 31 in 2026, about the same as the 1991–2020 average (Feb 1), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Hickman, CA?

Intermediate onions: the longest day near 95323 is 14 h 46 min, so day-neutral types bulb best; long-day varieties may not bulb fully.