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

Planting zone for 84536 — Monument Valley, UT

ZIP code 84536 (Monument Valley, San Juan County) is in USDA zone 8a: the coldest winter night averages 10 to 15 °F. The median last spring frost is April 10 and the first fall frost November 1.

Where ZIP 84536 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.

Zone8a10 to 15 °F
Coldest night−12.2 to −9.4 °C
Last frostApr 10
First frostNov 1
2012 zone7b

Was 7b on the 2012 map — half a zone warmer now. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 8a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Monument Valley, UT…

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 Monument Valley, UT

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 10median — 50% chance of a later frost
Safe for tender plantsApril 30only 10% chance of frost after
First fall frostNovember 1median — 10% chance by Oct 17
Growing season205 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 25 and returns around November 12.

From the NOAA station Monument Valley, AZ — 11 miles away, elevation 5,502 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 84536

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 27 – Mar 13
SpinachSow outdoors · Feb 27 – Mar 20
Broccoli, cabbageStart indoors · Jan 30 – Feb 13
Broccoli, cabbageTransplant · Mar 20 – Apr 3
Onion setsPlant outdoors · Mar 13 – Mar 27
PotatoesPlant outdoors · Mar 20 – Apr 3
LettuceSow outdoors · Mar 13 – Mar 27
Carrots, beetsSow outdoors · Mar 20 – Apr 3
TomatoesStart indoors · Feb 13 – Feb 27
TomatoesTransplant · Apr 17 – May 1
Peppers, eggplantStart indoors · Jan 30 – Feb 13
Peppers, eggplantTransplant · Apr 24 – May 8
BeansSow outdoors · Apr 17 – May 1
Sweet cornSow outdoors · Apr 17 – May 1
Cucumbers, squashSow outdoors · Apr 17 – May 1
Fall lettuce, spinachSow outdoors · Sep 6 – Sep 20
GarlicPlant cloves · Oct 18 – Nov 22
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 10) and first fall frost (Nov 1) 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 84536 came on Mar 2 — 7 days earlier than the 1991–2020 average (Mar 9).

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 8a in Utah

575 plants native to the lower 48 states, recorded in Utah, and rated by the USDA to survive 10 °F or colder — the bottom of zone 8a. Each links to its USDA PLANTS profile.

Trees 31

American beech80 ft · blooms mid spring · low shade tolerance · to −44 °FArizona cypress50 ft · blooms spring · low shade tolerance · to −23 °FArizona walnut50 ft · blooms late spring · high shade tolerance · to −33 °Fbalsam poplar80 ft · blooms late spring · high shade tolerance · to −79 °Fblack locust60 ft · blooms spring · high shade tolerance · to −37 °Fblack walnut100 ft · blooms late spring · high shade tolerance · to −28 °F

Shrubs 116

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °Falderleaf mountain mahogany15 ft · blooms late spring · medium shade tolerance · to −41 °Falpine laurel1 ft · blooms late spring · low shade tolerance · to −28 °FAmerican plum24 ft · blooms mid spring · high shade tolerance · to −38 °Fantelope bitterbrush6 ft · blooms early spring · medium shade tolerance · to −36 °FApache plume6 ft · blooms late spring · high shade tolerance · to −23 °F

Wildflowers & perennials 260

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 licorice4 ft · blooms late spring · medium shade tolerance · to −38 °F

Grasses 155

alkali cordgrass3 ft · blooms late summer · high shade tolerance · to −38 °Falkali sacaton3 ft · blooms mid summer · high shade tolerance · to −38 °FAlpine Meadow-Foxtail0.5 ft · blooms mid spring · medium shade tolerance · to −33 °Falpine timothy1.4 ft · blooms late spring · medium shade tolerance · to −43 °Fanalogue sedge1.5 ft · blooms late spring · medium shade tolerance · to −38 °Farctic bluegrass2 ft · high shade tolerance · to −62 °F

Vines 3

trumpet creeper2 ft · blooms summer · high shade tolerance · to −13 °FVirginia creeper1 ft · blooms late spring · medium shade tolerance · to −28 °Fwestern 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 Monument Valley, UT.

Soil in Monument Valley, UT

The soil mapped at the center of ZIP 84536 is Lithic Torriorthents — fine sandy loam, well drained.

TextureFine 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: Rock outcrop, sandstone-Lithic Torriorthents, association, steep.

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 84536; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Monument Valley, UT

Summer high93 °Faverage high, July
Winter low25 °Faverage low, January
Hot days59days a year at 90 °F or more
Freezing nights105nights a year at 32 °F or less
Growing degree days4,194base 50 °F — the season’s usable heat
Longest day14 h 43 mindaylight on June 21
Shortest day9 h 36 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation9.8 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 41 °F, low 25 °F 41°25° JanFebruary: average high 48 °F, low 29 °F 48°29° FebMarch: average high 59 °F, low 36 °F 59°36° MarApril: average high 67 °F, low 42 °F 67°42° AprMay: average high 77 °F, low 54 °F 77°54° MayJune: average high 89 °F, low 65 °F 89°65° JunJuly: average high 93 °F, low 68 °F 93°68° JulAugust: average high 90 °F, low 65 °F 90°65° AugSeptember: average high 82 °F, low 58 °F 82°58° SepOctober: average high 69 °F, low 46 °F 69°46° OctNovember: average high 53 °F, low 34 °F 53°34° NovDecember: average high 41 °F, low 25 °F 41°25° Dec

Precipitation by month inches

0″1″2″January: 0.70 in precipitation 0.7 JanFebruary: 0.89 in precipitation 0.9 FebMarch: 0.84 in precipitation 0.8 MarApril: 0.74 in precipitation 0.7 AprMay: 0.61 in precipitation 0.6 MayJune: 0.26 in precipitation 0.3 JunJuly: 1.11 in precipitation 1.1 JulAugust: 0.94 in precipitation 0.9 AugSeptember: 1.16 in precipitation 1.2 SepOctober: 1.10 in precipitation 1.1 OctNovember: 0.75 in precipitation 0.8 NovDecember: 0.69 in precipitation 0.7 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Monument Valley, AZ (11 mi away); precipitation: Valley Of The Gods, UT (19 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.

845317b
Mexican Hat, UT · 22 mi
845338a
Lake Powell, UT · 26 mi
865357a
Dennehotso, AZ · 29 mi
860337a
Kayenta, AZ · 31 mi
845127a
Bluff, UT · 36 mi
860547a
Shonto, AZ · 38 mi
860447a
Tonalea, AZ · 42 mi
865457a
Rock Point, AZ · 47 mi

Utah planting zones →

Questions about 84536

What planting zone is ZIP code 84536?

ZIP code 84536 (Monument Valley, UT) is in USDA hardiness zone 8a on the 2023 map: the coldest night of an average winter reaches 10 to 15 °F (−12.2 to −9.4 °C).

When is the last frost in Monument Valley, UT?

The median last spring frost (32 °F) near 84536 is April 10; after April 30 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Monument Valley station.

When is the first frost in Monument Valley, UT?

The median first fall frost near 84536 is November 1, giving a median frost-free growing season of 205 days.

When should I plant tomatoes in 84536?

Start tomato seeds indoors around Feb 13 – Feb 27 and set transplants outside around Apr 17 – May 1, one to three weeks after the median last frost.

How much rain and snow does 84536 get?

About 9.8 inches of precipitation a year (NOAA 1991–2020 normals, Valley Of The Gods station).

How hot do summers get in Monument Valley, UT?

The average high peaks at 93 °F in July, with about 59 days a year at 90 °F or more.

What kind of soil does 84536 have?

The USDA soil survey maps Lithic Torriorthents at the center of ZIP 84536: fine sandy loam, well drained, pH about 8.2 (alkaline).

Did spring come early in Monument Valley, UT in 2026?

Spring leaf-out near 84536 came on Mar 2 in 2026, 7 days earlier than the 1991–2020 average (Mar 9), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Monument Valley, UT?

Intermediate onions: the longest day near 84536 is 14 h 43 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 84536 change?

Yes. The 2012 USDA map put 84536 in zone 7b; the 2023 map puts it in zone 8a. The newer map uses 1991–2020 data and more weather stations.