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

Planting zone for 86433 — Oatman, AZ

ZIP code 86433 (Oatman, Mohave County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F. The median last spring frost is February 18 and the first fall frost December 2.

Where ZIP 86433 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 18
First frostDec 2
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 Oatman, 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 Oatman, AZ

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostFebruary 18median — 50% chance of a later frost
Safe for tender plantsMarch 16only 10% chance of frost after
First fall frostDecember 2median — 10% chance by Nov 16
Growing season288 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 19 and returns around December 16.

From the NOAA station Yucca 1 Nne, AZ — 13 miles away, elevation 1,949 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 86433

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Jan 7 – Jan 21
SpinachSow outdoors · Jan 7 – Jan 28
Broccoli, cabbageStart indoors · Dec 10 – Dec 24
Broccoli, cabbageTransplant · Jan 28 – Feb 11
Onion setsPlant outdoors · Jan 21 – Feb 4
PotatoesPlant outdoors · Jan 28 – Feb 11
LettuceSow outdoors · Jan 21 – Feb 4
Carrots, beetsSow outdoors · Jan 28 – Feb 11
TomatoesStart indoors · Dec 24 – Jan 7
TomatoesTransplant · Feb 25 – Mar 11
Peppers, eggplantStart indoors · Dec 10 – Dec 24
Peppers, eggplantTransplant · Mar 4 – Mar 18
BeansSow outdoors · Feb 25 – Mar 11
Sweet cornSow outdoors · Feb 25 – Mar 11
Cucumbers, squashSow outdoors · Feb 25 – Mar 11
Fall lettuce, spinachSow outdoors · Oct 7 – Oct 21
GarlicPlant cloves · Nov 18 – Dec 23
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Feb 18) and first fall frost (Dec 2) 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 86433 came on Jan 18 — 8 days earlier than the 1991–2020 average (Jan 26).

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.

Trees 26

Arizona cypress50 ft · blooms spring · low shade tolerance · to −23 °FArizona madrone30 ft · blooms late spring · high shade tolerance · to −4 °FArizona sycamore80 ft · blooms early spring · high shade tolerance · to −8 °FArizona walnut50 ft · blooms late spring · high shade tolerance · to −33 °Fblack locust60 ft · blooms spring · high shade tolerance · to −37 °Fblue spruce100 ft · blooms late spring · medium shade tolerance · to −38 °F

Shrubs 113

alderleaf mountain mahogany15 ft · blooms late spring · medium shade tolerance · to −41 °FAmerican plum24 ft · blooms mid spring · high shade tolerance · to −38 °FAmerican tarwort3 ft · blooms late spring · high shade tolerance · to −23 °Fantelope bitterbrush6 ft · blooms early spring · medium shade tolerance · to −36 °FApache plume6 ft · blooms late spring · high shade tolerance · to −23 °Fbig sagebrush4 ft · blooms mid summer · high shade tolerance · to −43 °F

Wildflowers & perennials 199

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °Falpine bistort1 ft · blooms mid spring · high shade tolerance · to −38 °Falpine mountainsorrel1 ft · blooms mid summer · medium shade tolerance · to −43 °FAmerican alpine speedwell1 ft · blooms summer · medium shade tolerance · to −28 °FAmerican bistort1.5 ft · blooms mid spring · high shade tolerance · to −38 °FAmerican century plant6 ft · blooms indeterminate · high shade tolerance · to 12 °F

Grasses 152

alkali cordgrass3 ft · blooms late summer · high shade tolerance · to −38 °Falkali sacaton3 ft · blooms mid summer · high shade tolerance · to −38 °Falpine timothy1.4 ft · blooms late spring · medium shade tolerance · to −43 °Fanalogue sedge1.5 ft · blooms late spring · medium shade tolerance · to −38 °FArizona cottontop4 ft · blooms late summer · high shade tolerance · to −13 °FArizona fescue2 ft · blooms late spring · high shade tolerance · to −23 °F

Vines 1

western white clematis1 ft · blooms mid summer · medium shade tolerance · to −38 °F

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 Oatman, AZ.

Soil in Oatman, AZ

The soil mapped at the center of ZIP 86433 is Razorback — very gravelly sandy loam, somewhat excessively drained.

TextureVery gravelly sandy loamdrains and warms fast; dries out and needs more feeding
pH7.9alkaline; most vegetables like 6.0–7.0
DrainageSomewhat excessively drainednatural drainage class
Organic matter0.75%low — add compost
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Rock outcrop-Razorback complex, 20 to 70 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 86433; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Oatman, AZ

Summer high103 °Faverage high, July
Winter low37 °Faverage low, December
Hot days150days a year at 90 °F or more
Freezing nights15nights a year at 32 °F or less
Growing degree days6,978base 50 °F — the season’s usable heat
Longest day14 h 30 mindaylight on June 21
Shortest day9 h 48 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation6.7 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°90°100°110°32 °FJanuary: average high 61 °F, low 38 °F 61°38° JanFebruary: average high 65 °F, low 40 °F 65°40° FebMarch: average high 72 °F, low 45 °F 72°45° MarApril: average high 79 °F, low 50 °F 79°50° AprMay: average high 89 °F, low 60 °F 89°60° MayJune: average high 99 °F, low 69 °F 99°69° JunJuly: average high 103 °F, low 77 °F 103°77° JulAugust: average high 102 °F, low 76 °F 102°76° AugSeptember: average high 96 °F, low 68 °F 96°68° SepOctober: average high 84 °F, low 56 °F 84°56° OctNovember: average high 71 °F, low 44 °F 71°44° NovDecember: average high 60 °F, low 37 °F 60°37° Dec

Precipitation by month inches

0″1″2″January: 1.06 in precipitation 1.1 JanFebruary: 1.29 in precipitation 1.3 FebMarch: 0.83 in precipitation 0.8 MarApril: 0.27 in precipitation 0.3 AprMay: 0.10 in precipitation 0.1 MayJune: 0.05 in precipitation 0.1 JunJuly: 0.45 in precipitation 0.5 JulAugust: 0.55 in precipitation 0.6 AugSeptember: 0.49 in precipitation 0.5 SepOctober: 0.52 in precipitation 0.5 OctNovember: 0.46 in precipitation 0.5 NovDecember: 0.59 in precipitation 0.6 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Yucca 1 Nne, AZ (13 mi away); precipitation: Yucca 1 Nne, AZ (13 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

864409b
Mohave Valley, AZ · 11 mi
864269b
Fort Mohave, AZ · 12 mi
864369b
Topock, AZ · 14 mi
864279b
Fort Mohave, AZ · 14 mi
864469a
Mohave Valley, AZ · 14 mi
8644210a
Bullhead City, AZ · 16 mi
864139a
Golden Valley, AZ · 18 mi
8643010a
Bullhead City, AZ · 18 mi

Arizona planting zones →

Questions about 86433

What planting zone is ZIP code 86433?

ZIP code 86433 (Oatman, 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 Oatman, AZ?

The median last spring frost (32 °F) near 86433 is February 18; after March 16 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Yucca 1 Nne station.

When is the first frost in Oatman, AZ?

The median first fall frost near 86433 is December 2, giving a median frost-free growing season of 288 days.

When should I plant tomatoes in 86433?

Start tomato seeds indoors around Dec 24 – Jan 7 and set transplants outside around Feb 25 – Mar 11, one to three weeks after the median last frost.

How much rain and snow does 86433 get?

About 6.7 inches of precipitation a year (NOAA 1991–2020 normals, Yucca 1 Nne station).

How hot do summers get in Oatman, AZ?

The average high peaks at 103 °F in July, with about 150 days a year at 90 °F or more.

What kind of soil does 86433 have?

The USDA soil survey maps Razorback at the center of ZIP 86433: very gravelly sandy loam, somewhat excessively drained, pH about 7.9 (alkaline).

Did spring come early in Oatman, AZ in 2026?

Spring leaf-out near 86433 came on Jan 18 in 2026, 8 days earlier than the 1991–2020 average (Jan 26), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Oatman, AZ?

Intermediate onions: the longest day near 86433 is 14 h 30 min, so day-neutral types bulb best; long-day varieties may not bulb fully.