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

Planting zone for 86022 — Fredonia, AZ

ZIP code 86022 (Fredonia, Coconino County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is May 1 and the first fall frost October 19.

Where ZIP 86022 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 1

First frostOct 19

2012 zone7b

Was 7b on the 2012 map — half a zone colder now. 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 Fredonia, 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 Fredonia, AZ

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 1median — 50% chance of a later frost

Safe for tender plantsMay 18only 10% chance of frost after

First fall frostOctober 19median — 10% chance by Oct 5

Growing season168 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 18 and returns around October 29.

From the NOAA station Pipe Spring Nm, AZ — 12 miles away, elevation 4,922 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 86022

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 20 – Apr 3

SpinachSow outdoors · Mar 20 – Apr 10

Broccoli, cabbageStart indoors · Feb 20 – Mar 6

Broccoli, cabbageTransplant · Apr 10 – Apr 24

Onion setsPlant outdoors · Apr 3 – Apr 17

PotatoesPlant outdoors · Apr 10 – Apr 24

LettuceSow outdoors · Apr 3 – Apr 17

Carrots, beetsSow outdoors · Apr 10 – Apr 24

TomatoesStart indoors · Mar 6 – Mar 20

TomatoesTransplant · May 8 – May 22

Peppers, eggplantStart indoors · Feb 20 – Mar 6

Peppers, eggplantTransplant · May 15 – May 29

BeansSow outdoors · May 8 – May 22

Sweet cornSow outdoors · May 8 – May 22

Cucumbers, squashSow outdoors · May 8 – May 22

Fall lettuce, spinachSow outdoors · Aug 24 – Sep 7

GarlicPlant cloves · Oct 5 – Nov 9

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 1) and first fall frost (Oct 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 86022 came on Feb 10 — 22 days earlier than the 1991–2020 average (Mar 4).

average
Mar 42026
Feb 10

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 Fredonia, AZ.

Soil in Fredonia, AZ

The soil mapped at the center of ZIP 86022 is Curhollow — loam, well drained.

TextureLoama good balance for most vegetables

pH7.9alkaline; 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: Curhollow-Mellenthin complex, 2 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 86022; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Fredonia, AZ

Summer high94 °Faverage high, July

Winter low22 °Faverage low, December

Hot days78days a year at 90 °F or more

Freezing nights134nights a year at 32 °F or less

Growing degree days3,619base 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

Precipitation11.4 inper year, rain and melted snow

Snowfall6 inper year

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

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

Nearby ZIP codes

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

Mount Carmel, UT · 34 mi

860217b

Colorado City, AZ · 35 mi

847676b

Springdale, UT · 38 mi

847638a

Rockville, UT · 38 mi

847586b

Orderville, UT · 40 mi

860526b

North Rim, AZ · 41 mi

Arizona planting zones →

Questions about 86022

What planting zone is ZIP code 86022?

ZIP code 86022 (Fredonia, 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 Fredonia, AZ?

The median last spring frost (32 °F) near 86022 is May 1; after May 18 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Pipe Spring Nm station.

When is the first frost in Fredonia, AZ?

The median first fall frost near 86022 is October 19, giving a median frost-free growing season of 168 days.

When should I plant tomatoes in 86022?

Start tomato seeds indoors around Mar 6 – Mar 20 and set transplants outside around May 8 – May 22, one to three weeks after the median last frost.

How much rain and snow does 86022 get?

About 11.4 inches of precipitation a year and 6 inches of snowfall (NOAA 1991–2020 normals, Pipe Spring Nm station).

How hot do summers get in Fredonia, AZ?

The average high peaks at 94 °F in July, with about 78 days a year at 90 °F or more.

What kind of soil does 86022 have?

The USDA soil survey maps Curhollow at the center of ZIP 86022: loam, well drained, pH about 7.9 (alkaline).

Did spring come early in Fredonia, AZ in 2026?

Spring leaf-out near 86022 came on Feb 10 in 2026, 22 days earlier than the 1991–2020 average (Mar 4), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Fredonia, AZ?

Intermediate onions: the longest day near 86022 is 14 h 41 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 86022 change?

Yes. The 2012 USDA map put 86022 in zone 7b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.