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

Planting zone for 86337 — Seligman, AZ

ZIP code 86337 (Seligman, Yavapai County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is May 10 and the first fall frost October 15.

Where ZIP 86337 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.

Zone7a0 to 5 °F

Coldest night−17.8 to −15 °C

Last frostMay 10

First frostOct 15

2012 zone7a

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 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Seligman, 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 Seligman, AZ

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 10median — 50% chance of a later frost

Safe for tender plantsMay 29only 10% chance of frost after

First fall frostOctober 15median — 10% chance by Oct 1

Growing season154 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 24 and returns around October 26.

From the NOAA station Seligman, AZ — 12 miles away, elevation 5,250 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 86337

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 29 – Apr 12

SpinachSow outdoors · Mar 29 – Apr 19

Broccoli, cabbageStart indoors · Mar 1 – Mar 15

Broccoli, cabbageTransplant · Apr 19 – May 3

Onion setsPlant outdoors · Apr 12 – Apr 26

PotatoesPlant outdoors · Apr 19 – May 3

LettuceSow outdoors · Apr 12 – Apr 26

Carrots, beetsSow outdoors · Apr 19 – May 3

TomatoesStart indoors · Mar 15 – Mar 29

TomatoesTransplant · May 17 – May 31

Peppers, eggplantStart indoors · Mar 1 – Mar 15

Peppers, eggplantTransplant · May 24 – Jun 7

BeansSow outdoors · May 17 – May 31

Sweet cornSow outdoors · May 17 – May 31

Cucumbers, squashSow outdoors · May 17 – May 31

Fall lettuce, spinachSow outdoors · Aug 20 – Sep 3

GarlicPlant cloves · Oct 1 – Nov 5

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 10) and first fall frost (Oct 15) 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 86337 came on Feb 16 — 21 days earlier than the 1991–2020 average (Mar 9).

average
Mar 92026
Feb 16

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 7a in Arizona

457 plants native to the lower 48 states, recorded in Arizona, and rated by the USDA to survive 0 °F or colder — the bottom of zone 7a. 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 Seligman, AZ.

Soil in Seligman, AZ

The soil mapped at the center of ZIP 86337 is Cabezon — very stony clay loam, well drained.

TextureVery stony clay loamholds water and nutrients; slow to drain and warm up

pH7.4slightly alkaline; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter1.5%low — add compost

Hydrologic groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Cabezon-Springerville complex, 5 to 25 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 86337; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Seligman, AZ

Summer high93 °Faverage high, July

Winter low23 °Faverage low, December

Hot days69days a year at 90 °F or more

Freezing nights148nights a year at 32 °F or less

Growing degree days3,326base 50 °F — the season’s usable heat

Longest day14 h 32 mindaylight on June 21

Shortest day9 h 47 mindaylight on December 21

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

Precipitation12.1 inper year, rain and melted snow

Snowfall10 inper year; 4 days with snow on the ground

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Seligman, AZ (12 mi away); precipitation: Seligman, AZ (12 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

863207a

Ash Fork, AZ · 26 mi

864378a

Valentine, AZ · 33 mi

Hackberry, AZ · 42 mi

864348a

Peach Springs, AZ · 42 mi

863219a

Bagdad, AZ · 48 mi

Arizona planting zones →

Questions about 86337

What planting zone is ZIP code 86337?

ZIP code 86337 (Seligman, AZ) is in USDA hardiness zone 7a on the 2023 map: the coldest night of an average winter reaches 0 to 5 °F (−17.8 to −15 °C).

When is the last frost in Seligman, AZ?

The median last spring frost (32 °F) near 86337 is May 10; after May 29 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Seligman station.

When is the first frost in Seligman, AZ?

The median first fall frost near 86337 is October 15, giving a median frost-free growing season of 154 days.

When should I plant tomatoes in 86337?

Start tomato seeds indoors around Mar 15 – Mar 29 and set transplants outside around May 17 – May 31, one to three weeks after the median last frost.

How much rain and snow does 86337 get?

About 12.1 inches of precipitation a year and 10 inches of snowfall (NOAA 1991–2020 normals, Seligman station).

How hot do summers get in Seligman, AZ?

The average high peaks at 93 °F in July, with about 69 days a year at 90 °F or more.

What kind of soil does 86337 have?

The USDA soil survey maps Cabezon at the center of ZIP 86337: very stony clay loam, well drained, pH about 7.4 (slightly alkaline).

Did spring come early in Seligman, AZ in 2026?

Spring leaf-out near 86337 came on Feb 16 in 2026, 21 days earlier than the 1991–2020 average (Mar 9), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Seligman, AZ?

Intermediate onions: the longest day near 86337 is 14 h 32 min, so day-neutral types bulb best; long-day varieties may not bulb fully.