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

Planting zone for 85942 — Woodruff, AZ

ZIP code 85942 (Woodruff, Navajo County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is May 4 and the first fall frost October 16.

Where ZIP 85942 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 4

First frostOct 16

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 Woodruff, 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 Woodruff, AZ

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 4median — 50% chance of a later frost

Safe for tender plantsMay 21only 10% chance of frost after

First fall frostOctober 16median — 10% chance by Oct 3

Growing season162 daysfrost-free, median

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

From the NOAA station Petrified Forest Np, AZ — 9 miles away, elevation 5,446 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 85942

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 23 – Apr 6

SpinachSow outdoors · Mar 23 – Apr 13

Broccoli, cabbageStart indoors · Feb 23 – Mar 9

Broccoli, cabbageTransplant · Apr 13 – Apr 27

Onion setsPlant outdoors · Apr 6 – Apr 20

PotatoesPlant outdoors · Apr 13 – Apr 27

LettuceSow outdoors · Apr 6 – Apr 20

Carrots, beetsSow outdoors · Apr 13 – Apr 27

TomatoesStart indoors · Mar 9 – Mar 23

TomatoesTransplant · May 11 – May 25

Peppers, eggplantStart indoors · Feb 23 – Mar 9

Peppers, eggplantTransplant · May 18 – Jun 1

BeansSow outdoors · May 11 – May 25

Sweet cornSow outdoors · May 11 – May 25

Cucumbers, squashSow outdoors · May 11 – May 25

Fall lettuce, spinachSow outdoors · Aug 21 – Sep 4

GarlicPlant cloves · Oct 2 – Nov 6

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 4) and first fall frost (Oct 16) 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 85942 came on Feb 14 — 18 days earlier than the 1991–2020 average (Mar 4).

average
Mar 42026
Feb 14

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 Woodruff, AZ.

Soil in Woodruff, AZ

The soil mapped at the center of ZIP 85942 is Epikom — channery sandy loam, well drained.

TextureChannery sandy loamdrains and warms fast; dries out and needs more feeding

pH8.2alkaline; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter0.25%low — add compost

Hydrologic groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Epikom channery sandy loam, 1 to 12 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 85942; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Woodruff, AZ

Summer high93 °Faverage high, July

Winter low21 °Faverage low, January

Hot days72days a year at 90 °F or more

Freezing nights134nights a year at 32 °F or less

Growing degree days3,657base 50 °F — the season’s usable heat

Longest day14 h 29 mindaylight on June 21

Shortest day9 h 49 mindaylight on December 21

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

Precipitation9.6 inper year, rain and melted snow

Snowfall4 inper year; 2 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: Petrified Forest Np, AZ (9 mi away); precipitation: Petrified Forest Np, AZ (9 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7a.

860257a

Holbrook, AZ · 8 mi

860297a

Sun Valley, AZ · 14 mi

859377a

Snowflake, AZ · 14 mi

860287a

Petrified Forest Natl Pk, AZ · 22 mi

Joseph City, AZ · 25 mi

859127a

White Mountain Lake, AZ · 26 mi

Arizona planting zones →

Questions about 85942

What planting zone is ZIP code 85942?

ZIP code 85942 (Woodruff, 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 Woodruff, AZ?

The median last spring frost (32 °F) near 85942 is May 4; after May 21 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Petrified Forest Np station.

When is the first frost in Woodruff, AZ?

The median first fall frost near 85942 is October 16, giving a median frost-free growing season of 162 days.

When should I plant tomatoes in 85942?

Start tomato seeds indoors around Mar 9 – Mar 23 and set transplants outside around May 11 – May 25, one to three weeks after the median last frost.

How much rain and snow does 85942 get?

About 9.6 inches of precipitation a year and 4 inches of snowfall (NOAA 1991–2020 normals, Petrified Forest Np station).

How hot do summers get in Woodruff, AZ?

The average high peaks at 93 °F in July, with about 72 days a year at 90 °F or more.

What kind of soil does 85942 have?

The USDA soil survey maps Epikom at the center of ZIP 85942: channery sandy loam, well drained, pH about 8.2 (alkaline).

Did spring come early in Woodruff, AZ in 2026?

Spring leaf-out near 85942 came on Feb 14 in 2026, 18 days earlier than the 1991–2020 average (Mar 4), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Woodruff, AZ?

Intermediate onions: the longest day near 85942 is 14 h 29 min, so day-neutral types bulb best; long-day varieties may not bulb fully.