Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 85360 — Wikieup, AZ

ZIP code 85360 (Wikieup, Mohave County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F. The median last spring frost is March 19 and the first fall frost November 23.

Where ZIP 85360 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 frostMar 19

First frostNov 23

2012 zone9a

Was 9a on the 2012 map — half a zone warmer now. 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 Wikieup, AZ…

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 Wikieup, AZ

JanFebMarAprMayJunJulAugSepOctNovDec

Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free

Last spring frostMarch 19median — 50% chance of a later frost

Safe for tender plantsApril 22only 10% chance of frost after

First fall frostNovember 23median — 10% chance by Nov 4

Growing season246 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 22 and returns around December 5.

From the NOAA station Wikieup, AZ — 11 miles away, elevation 2,011 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 85360

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 5 – Feb 19

SpinachSow outdoors · Feb 5 – Feb 26

Broccoli, cabbageStart indoors · Jan 8 – Jan 22

Broccoli, cabbageTransplant · Feb 26 – Mar 12

Onion setsPlant outdoors · Feb 19 – Mar 5

PotatoesPlant outdoors · Feb 26 – Mar 12

LettuceSow outdoors · Feb 19 – Mar 5

Carrots, beetsSow outdoors · Feb 26 – Mar 12

TomatoesStart indoors · Jan 22 – Feb 5

TomatoesTransplant · Mar 26 – Apr 9

Peppers, eggplantStart indoors · Jan 8 – Jan 22

Peppers, eggplantTransplant · Apr 2 – Apr 16

BeansSow outdoors · Mar 26 – Apr 9

Sweet cornSow outdoors · Mar 26 – Apr 9

Cucumbers, squashSow outdoors · Mar 26 – Apr 9

Fall lettuce, spinachSow outdoors · Sep 28 – Oct 12

GarlicPlant cloves · Nov 9 – Dec 14

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 19) and first fall frost (Nov 23) 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 85360 came on Jan 23 — 4 days earlier than the 1991–2020 average (Jan 27).

average
Jan 272026
Jan 23

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).

Native plants for zone 9b in Arizona

499 plants native to the lower 48 states, recorded in Arizona, and rated by the USDA to survive 25 °F or colder — the bottom of zone 9b. Each links to its USDA PLANTS profile.

Source: USDA, NRCS. 2026. The PLANTS Database (plants.usda.gov), National Plant Data Team — state distribution, native status and the “Temperature, Minimum” characteristic. Check light, moisture and soil needs before buying; local nurseries and your state native plant society can confirm what thrives in Wikieup, AZ.

Soil in Wikieup, AZ

The soil mapped at the center of ZIP 85360 is Dudleyville — gravelly loamy sand, excessively drained.

TextureGravelly loamy sanddrains and warms fast; dries out and needs more feeding

pH7.9alkaline; most vegetables like 6.0–7.0

DrainageExcessively drainednatural drainage class

Organic matter0.75%low — add compost

Hydrologic groupAwater soaks in fast

Farmland classNot prime farmlandUSDA classification

Map unit: Dudleyville-Vinton-Riverwash complex, dry, 1 to 3 percent slopes.

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 85360; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Wikieup, AZ

Summer high105 °Faverage high, July

Winter low33 °Faverage low, December

Hot days159days a year at 90 °F or more

Freezing nights45nights a year at 32 °F or less

Growing degree days6,515base 50 °F — the season’s usable heat

Longest day14 h 28 mindaylight on June 21

Shortest day9 h 50 mindaylight on December 21

Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully

Precipitation8.4 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

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

Nearby ZIP codes

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

Lake Havasu City, AZ · 31 mi

853579a

Wenden, AZ · 37 mi

9226710a

Parker Dam, CA · 40 mi

864018b

Kingman, AZ · 40 mi

8640410a

Lake Havasu City, AZ · 42 mi

8640510a

Lake Havasu City, AZ · 43 mi

Arizona planting zones →

Questions about 85360

What planting zone is ZIP code 85360?

ZIP code 85360 (Wikieup, AZ) 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 Wikieup, AZ?

The median last spring frost (32 °F) near 85360 is March 19; after April 22 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Wikieup station.

When is the first frost in Wikieup, AZ?

The median first fall frost near 85360 is November 23, giving a median frost-free growing season of 246 days.

When should I plant tomatoes in 85360?

Start tomato seeds indoors around Jan 22 – Feb 5 and set transplants outside around Mar 26 – Apr 9, one to three weeks after the median last frost.

How much rain and snow does 85360 get?

About 8.4 inches of precipitation a year (NOAA 1991–2020 normals, Wikieup station).

How hot do summers get in Wikieup, AZ?

The average high peaks at 105 °F in July, with about 159 days a year at 90 °F or more.

What kind of soil does 85360 have?

The USDA soil survey maps Dudleyville at the center of ZIP 85360: gravelly loamy sand, excessively drained, pH about 7.9 (alkaline).

Did spring come early in Wikieup, AZ in 2026?

Spring leaf-out near 85360 came on Jan 23 in 2026, 4 days earlier than the 1991–2020 average (Jan 27), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Wikieup, AZ?

Intermediate onions: the longest day near 85360 is 14 h 28 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 85360 change?

Yes. The 2012 USDA map put 85360 in zone 9a; the 2023 map puts it in zone 9b. The newer map uses 1991–2020 data and more weather stations.