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

Planting zone for 86432 — Littlefield, AZ

ZIP code 86432 (Littlefield, Mohave County) is in USDA zone 8b: the coldest winter night averages 15 to 20 °F. The median last spring frost is March 7 and the first fall frost November 19.

Where ZIP 86432 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 frostMar 7
First frostNov 19
2012 zone8b

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 8b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Littlefield, 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 Littlefield, AZ

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 7median — 50% chance of a later frost
Safe for tender plantsApril 10only 10% chance of frost after
First fall frostNovember 19median — 10% chance by Nov 1
Growing season251 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 20 and returns around December 1.

From the NOAA station Beaver Dam, AZ — 14 miles away, elevation 1,933 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 86432

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Jan 24 – Feb 7
SpinachSow outdoors · Jan 24 – Feb 14
Broccoli, cabbageStart indoors · Dec 27 – Jan 10
Broccoli, cabbageTransplant · Feb 14 – Feb 28
Onion setsPlant outdoors · Feb 7 – Feb 21
PotatoesPlant outdoors · Feb 14 – Feb 28
LettuceSow outdoors · Feb 7 – Feb 21
Carrots, beetsSow outdoors · Feb 14 – Feb 28
TomatoesStart indoors · Jan 10 – Jan 24
TomatoesTransplant · Mar 14 – Mar 28
Peppers, eggplantStart indoors · Dec 27 – Jan 10
Peppers, eggplantTransplant · Mar 21 – Apr 4
BeansSow outdoors · Mar 14 – Mar 28
Sweet cornSow outdoors · Mar 14 – Mar 28
Cucumbers, squashSow outdoors · Mar 14 – Mar 28
Fall lettuce, spinachSow outdoors · Sep 24 – Oct 8
GarlicPlant cloves · Nov 5 – Dec 10
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 7) and first fall frost (Nov 19) 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 86432 came on Feb 23 — 7 days earlier than the 1991–2020 average (Mar 2).

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 8b in Arizona

482 plants native to the lower 48 states, recorded in Arizona, and rated by the USDA to survive 15 °F or colder — the bottom of zone 8b. Each links to its USDA PLANTS profile.

Trees 25

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 105

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 196

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 147

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 Littlefield, AZ.

Soil in Littlefield, AZ

The soil mapped at the center of ZIP 86432 is Tsezhin family — very cobbly loam, well drained.

TextureVery cobbly loama good balance for most vegetables
pH7.9alkaline; 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: Tsezhin family-Ashfork family-Rock outcrop complex, 10 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 86432; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Littlefield, AZ

Summer high109 °Faverage high, July
Winter low32 °Faverage low, December
Hot days151days a year at 90 °F or more
Freezing nights41nights a year at 32 °F or less
Growing degree days7,022base 50 °F — the season’s usable heat
Longest day14 h 41 mindaylight on June 21
Shortest day9 h 38 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation7 inper year, rain and melted snow

Average high and low, by month

20°30°40°50°60°70°80°90°100°110°120°32 °FJanuary: average high 62 °F, low 33 °F 62°33° JanFebruary: average high 66 °F, low 36 °F 66°36° FebMarch: average high 75 °F, low 43 °F 75°43° MarApril: average high 82 °F, low 48 °F 82°48° AprMay: average high 93 °F, low 58 °F 93°58° MayJune: average high 104 °F, low 65 °F 104°65° JunJuly: average high 109 °F, low 74 °F 109°74° JulAugust: average high 107 °F, low 73 °F 107°73° AugSeptember: average high 100 °F, low 64 °F 100°64° SepOctober: average high 86 °F, low 53 °F 86°53° OctNovember: average high 72 °F, low 40 °F 72°40° NovDecember: average high 60 °F, low 32 °F 60°32° Dec

Precipitation by month inches

0″1″2″January: 0.88 in precipitation 0.9 JanFebruary: 1.20 in precipitation 1.2 FebMarch: 0.87 in precipitation 0.9 MarApril: 0.50 in precipitation 0.5 AprMay: 0.28 in precipitation 0.3 MayJune: 0.16 in precipitation 0.2 JunJuly: 0.38 in precipitation 0.4 JulAugust: 0.44 in precipitation 0.4 AugSeptember: 0.34 in precipitation 0.3 SepOctober: 0.69 in precipitation 0.7 OctNovember: 0.45 in precipitation 0.5 NovDecember: 0.83 in precipitation 0.8 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Beaver Dam, AZ (14 mi away); precipitation: Beaver Dam, AZ (14 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

847908b
Saint George, UT · 19 mi
847718b
Saint George, UT · 22 mi
847918b
Saint George, UT · 22 mi
847708b
Saint George, UT · 24 mi
847808b
Washington, UT · 27 mi
847388b
Ivins, UT · 29 mi
847468b
Leeds, UT · 37 mi
847458a
La Verkin, UT · 38 mi

Arizona planting zones →

Questions about 86432

What planting zone is ZIP code 86432?

ZIP code 86432 (Littlefield, AZ) 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 Littlefield, AZ?

The median last spring frost (32 °F) near 86432 is March 7; after April 10 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Beaver Dam station.

When is the first frost in Littlefield, AZ?

The median first fall frost near 86432 is November 19, giving a median frost-free growing season of 251 days.

When should I plant tomatoes in 86432?

Start tomato seeds indoors around Jan 10 – Jan 24 and set transplants outside around Mar 14 – Mar 28, one to three weeks after the median last frost.

How much rain and snow does 86432 get?

About 7 inches of precipitation a year (NOAA 1991–2020 normals, Beaver Dam station).

How hot do summers get in Littlefield, AZ?

The average high peaks at 109 °F in July, with about 151 days a year at 90 °F or more.

What kind of soil does 86432 have?

The USDA soil survey maps Tsezhin family at the center of ZIP 86432: very cobbly loam, well drained, pH about 7.9 (alkaline).

Did spring come early in Littlefield, AZ in 2026?

Spring leaf-out near 86432 came on Feb 23 in 2026, 7 days earlier than the 1991–2020 average (Mar 2), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Littlefield, AZ?

Intermediate onions: the longest day near 86432 is 14 h 41 min, so day-neutral types bulb best; long-day varieties may not bulb fully.