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

Planting zone for 84033 — Henefer, UT

ZIP code 84033 (Henefer, Summit County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is May 30 and the first fall frost September 18.

Where ZIP 84033 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.

Zone6a−10 to −5 °F

Coldest night−23.3 to −20.6 °C

Last frostMay 30

First frostSep 18

2012 zone5a

Was 5a on the 2012 map — a full zone warmer now. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Henefer, 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 Henefer, UT

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 30median — 50% chance of a later frost

Safe for tender plantsJune 16only 10% chance of frost after

First fall frostSeptember 18median — 10% chance by Sep 4

Growing season112 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 10 and returns around October 1.

From the NOAA station Echo Dam, UT — 3 miles away, elevation 5,469 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 84033

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 18 – May 2

SpinachSow outdoors · Apr 18 – May 9

Broccoli, cabbageStart indoors · Mar 21 – Apr 4

Broccoli, cabbageTransplant · May 9 – May 23

Onion setsPlant outdoors · May 2 – May 16

PotatoesPlant outdoors · May 9 – May 23

LettuceSow outdoors · May 2 – May 16

Carrots, beetsSow outdoors · May 9 – May 23

TomatoesStart indoors · Apr 4 – Apr 18

TomatoesTransplant · Jun 6 – Jun 20

Peppers, eggplantStart indoors · Mar 21 – Apr 4

Peppers, eggplantTransplant · Jun 13 – Jun 27

BeansSow outdoors · Jun 6 – Jun 20

Sweet cornSow outdoors · Jun 6 – Jun 20

Cucumbers, squashSow outdoors · Jun 6 – Jun 20

Fall lettuce, spinachSow outdoors · Jul 24 – Aug 7

GarlicPlant cloves · Sep 4 – Oct 9

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 30) and first fall frost (Sep 18) 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 84033 came on Mar 23 — 21 days earlier than the 1991–2020 average (Apr 13).

average
Apr 132026
Mar 23

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 6a in Utah

546 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 6a. 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 Henefer, UT.

Soil in Henefer, UT

The soil mapped at the center of ZIP 84033 is Horrocks — very cobbly loam, well drained.

TextureVery cobbly loama good balance for most vegetables

pH6.7neutral; 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: Horrocks-Cutoff complex, 30 to 60 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 84033; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Henefer, UT

Summer high89 °Faverage high, July

Winter low12 °Faverage low, January

Hot days26days a year at 90 °F or more

Freezing nights191nights a year at 32 °F or less

Growing degree days2,091base 50 °F — the season’s usable heat

Longest day15 h 07 mindaylight on June 21

Shortest day9 h 13 mindaylight on December 21

Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)

Precipitation14.7 inper year, rain and melted snow

Snowfall72 inper year; 85 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: Echo Dam, UT (3 mi away); precipitation: Echo Dam, UT (3 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.

Coalville, UT · 15 mi

840985b

Park City, UT · 16 mi

840186a

Croydon, UT · 17 mi

841086b

Salt Lake City, UT · 17 mi

840615b

Peoa, UT · 17 mi

840685b

Park City, UT · 22 mi

Utah planting zones →

Questions about 84033

What planting zone is ZIP code 84033?

ZIP code 84033 (Henefer, UT) is in USDA hardiness zone 6a on the 2023 map: the coldest night of an average winter reaches −10 to −5 °F (−23.3 to −20.6 °C).

When is the last frost in Henefer, UT?

The median last spring frost (32 °F) near 84033 is May 30; after June 16 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Echo Dam station.

When is the first frost in Henefer, UT?

The median first fall frost near 84033 is September 18, giving a median frost-free growing season of 112 days.

When should I plant tomatoes in 84033?

Start tomato seeds indoors around Apr 4 – Apr 18 and set transplants outside around Jun 6 – Jun 20, one to three weeks after the median last frost.

How much rain and snow does 84033 get?

About 14.7 inches of precipitation a year and 72 inches of snowfall (NOAA 1991–2020 normals, Echo Dam station).

How hot do summers get in Henefer, UT?

The average high peaks at 89 °F in July, with about 26 days a year at 90 °F or more.

What kind of soil does 84033 have?

The USDA soil survey maps Horrocks at the center of ZIP 84033: very cobbly loam, well drained, pH about 6.7 (neutral).

Did spring come early in Henefer, UT in 2026?

Spring leaf-out near 84033 came on Mar 23 in 2026, 21 days earlier than the 1991–2020 average (Apr 13), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Henefer, UT?

Long-day onions: the longest day near 84033 is 15 h 07 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 84033 change?

Yes. The 2012 USDA map put 84033 in zone 5a; the 2023 map puts it in zone 6a. The newer map uses 1991–2020 data and more weather stations.