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

Planting zone for 86015 — Bellemont, AZ

ZIP code 86015 (Bellemont, Coconino County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is June 21 and the first fall frost September 17.

Where ZIP 86015 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.

Zone5b−15 to −10 °F

Coldest night−26.1 to −23.3 °C

Last frostJun 21

First frostSep 17

2012 zone5b

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 5b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Bellemont, 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 Bellemont, AZ

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostJune 21median — 50% chance of a later frost

Safe for tender plantsJuly 4only 10% chance of frost after

First fall frostSeptember 17median — 10% chance by Sep 3

Growing season85 daysfrost-free, median

A hard freeze (28 °F) usually ends around June 9 and returns around September 27.

From the NOAA station Bellemont WFO, AZ — within 1 mile, elevation 7,153 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 86015

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · May 10 – May 24

SpinachSow outdoors · May 10 – May 31

Broccoli, cabbageStart indoors · Apr 12 – Apr 26

Broccoli, cabbageTransplant · May 31 – Jun 14

Onion setsPlant outdoors · May 24 – Jun 7

PotatoesPlant outdoors · May 31 – Jun 14

LettuceSow outdoors · May 24 – Jun 7

Carrots, beetsSow outdoors · May 31 – Jun 14

TomatoesStart indoors · Apr 26 – May 10

TomatoesTransplant · Jun 28 – Jul 12

Peppers, eggplantStart indoors · Apr 12 – Apr 26

Peppers, eggplantTransplant · Jul 5 – Jul 19

BeansSow outdoors · Jun 28 – Jul 12

Sweet cornSow outdoors · Jun 28 – Jul 12

Cucumbers, squashSow outdoors · Jun 28 – Jul 12

Fall lettuce, spinachSow outdoors · Jul 23 – Aug 6

GarlicPlant cloves · Sep 3 – Oct 8

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Jun 21) and first fall frost (Sep 17) 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 86015 came on Mar 12 — 26 days earlier than the 1991–2020 average (Apr 7).

average
Apr 72026
Mar 12

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 5b in Arizona

405 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 5b. 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 Bellemont, AZ.

Soil in Bellemont, AZ

The soil mapped at the center of ZIP 86015 is Pluto — sandy loam, well drained.

TextureSandy loamdrains and warms fast; dries out and needs more feeding

pH7.6slightly alkaline; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter3.5%moderate

Hydrologic groupCwater soaks in slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Pluto-Procky complex, 1 to 14 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 86015; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Bellemont, AZ

Summer high82 °Faverage high, July

Winter low11 °Faverage low, January

Hot days3days a year at 90 °F or more

Freezing nights239nights a year at 32 °F or less

Growing degree days1,318base 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

Precipitation20.2 inper year, rain and melted snow

Snowfall73 inper year; 59 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: Bellemont WFO, AZ (within 1 mile); precipitation: Bellemont WFO, AZ (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

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

Flagstaff, AZ · 10 mi

860056a

Flagstaff, AZ · 14 mi

860177a

Munds Park, AZ · 21 mi

Arizona planting zones →

Questions about 86015

What planting zone is ZIP code 86015?

ZIP code 86015 (Bellemont, AZ) is in USDA hardiness zone 5b on the 2023 map: the coldest night of an average winter reaches −15 to −10 °F (−26.1 to −23.3 °C).

When is the last frost in Bellemont, AZ?

The median last spring frost (32 °F) near 86015 is June 21; after July 4 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Bellemont WFO station.

When is the first frost in Bellemont, AZ?

The median first fall frost near 86015 is September 17, giving a median frost-free growing season of 85 days.

When should I plant tomatoes in 86015?

Start tomato seeds indoors around Apr 26 – May 10 and set transplants outside around Jun 28 – Jul 12, one to three weeks after the median last frost.

How much rain and snow does 86015 get?

About 20.2 inches of precipitation a year and 73 inches of snowfall (NOAA 1991–2020 normals, Bellemont WFO station).

How hot do summers get in Bellemont, AZ?

The average high peaks at 82 °F in July, with about 3 days a year at 90 °F or more.

What kind of soil does 86015 have?

The USDA soil survey maps Pluto at the center of ZIP 86015: sandy loam, well drained, pH about 7.6 (slightly alkaline).

Did spring come early in Bellemont, AZ in 2026?

Spring leaf-out near 86015 came on Mar 12 in 2026, 26 days earlier than the 1991–2020 average (Apr 7), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Bellemont, AZ?

Intermediate onions: the longest day near 86015 is 14 h 32 min, so day-neutral types bulb best; long-day varieties may not bulb fully.