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

Planting zone for 80654 — Wiggins, CO

ZIP code 80654 (Wiggins, Morgan County) is in USDA zone 5a: the coldest winter night averages −20 to −15 °F. The median last spring frost is May 6 and the first fall frost October 6.

Where ZIP 80654 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.

Zone5a−20 to −15 °F
Coldest night−28.9 to −26.1 °C
Last frostMay 6
First frostOct 6
2012 zone5a

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 5a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Wiggins, CO…

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 Wiggins, CO

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 6median — 50% chance of a later frost
Safe for tender plantsMay 19only 10% chance of frost after
First fall frostOctober 6median — 10% chance by Sep 24
Growing season153 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 27 and returns around October 15.

From the NOAA station Ft Morgan, CO — 14 miles away, elevation 4,377 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 80654

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 25 – Apr 8
SpinachSow outdoors · Mar 25 – Apr 15
Broccoli, cabbageStart indoors · Feb 25 – Mar 11
Broccoli, cabbageTransplant · Apr 15 – Apr 29
Onion setsPlant outdoors · Apr 8 – Apr 22
PotatoesPlant outdoors · Apr 15 – Apr 29
LettuceSow outdoors · Apr 8 – Apr 22
Carrots, beetsSow outdoors · Apr 15 – Apr 29
TomatoesStart indoors · Mar 11 – Mar 25
TomatoesTransplant · May 13 – May 27
Peppers, eggplantStart indoors · Feb 25 – Mar 11
Peppers, eggplantTransplant · May 20 – Jun 3
BeansSow outdoors · May 13 – May 27
Sweet cornSow outdoors · May 13 – May 27
Cucumbers, squashSow outdoors · May 13 – May 27
Fall lettuce, spinachSow outdoors · Aug 11 – Aug 25
GarlicPlant cloves · Sep 22 – Oct 27
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 6) and first fall frost (Oct 6) 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 80654 came on Mar 1 — 26 days earlier than the 1991–2020 average (Mar 27).

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 5a in Colorado

532 plants native to the lower 48 states, recorded in Colorado, and rated by the USDA to survive −20 °F or colder — the bottom of zone 5a. Each links to its USDA PLANTS profile.

Trees 27

American elm120 ft · blooms early spring · medium shade tolerance · to −46 °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 °Fblack willow100 ft · blooms early spring · high shade tolerance · to −58 °Fblue spruce100 ft · blooms late spring · medium shade tolerance · to −38 °F

Shrubs 95

alderleaf mountain mahogany15 ft · blooms late spring · medium shade tolerance · to −41 °Falpine laurel1 ft · blooms late spring · low shade tolerance · to −28 °FAmerican black currant3 ft · blooms early spring · to −46 °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 239

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °Falpine aster0.3 ft · blooms early summer · medium shade tolerance · to −28 °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 °F

Grasses 159

Alaska oniongrass3 ft · blooms mid spring · low shade tolerance · to −33 °Falkali 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 °F

Vines 3

riverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °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 Wiggins, CO.

Soil in Wiggins, CO

The soil mapped at the center of ZIP 80654 is Truckton — loamy sand, well drained.

TextureLoamy sanddrains and warms fast; dries out and needs more feeding
pH7.0neutral; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupAwater soaks in fast
Farmland classNot prime farmlandUSDA classification

Map unit: Truckton loamy sand, 5 to 9 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 80654; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Wiggins, CO

Summer high90 °Faverage high, July
Winter low13 °Faverage low, January
Hot days51days a year at 90 °F or more
Freezing nights170nights a year at 32 °F or less
Growing degree days2,972base 50 °F — the season’s usable heat
Longest day15 h 02 mindaylight on June 21
Shortest day9 h 19 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation14.3 inper year, rain and melted snow
Snowfall23 inper year; 24 days with snow on the ground

Average high and low, by month

0°10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 42 °F, low 13 °F 42°13° JanFebruary: average high 45 °F, low 15 °F 45°15° FebMarch: average high 56 °F, low 25 °F 56°25° MarApril: average high 63 °F, low 33 °F 63°33° AprMay: average high 72 °F, low 43 °F 72°43° MayJune: average high 84 °F, low 54 °F 84°54° JunJuly: average high 90 °F, low 60 °F 90°60° JulAugust: average high 88 °F, low 57 °F 88°57° AugSeptember: average high 81 °F, low 47 °F 81°47° SepOctober: average high 66 °F, low 34 °F 66°34° OctNovember: average high 52 °F, low 21 °F 52°21° NovDecember: average high 42 °F, low 13 °F 42°13° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″January: 0.25 in precipitation, 3.8 in snowfall 0.3❄4 JanFebruary: 0.27 in precipitation, 3.9 in snowfall 0.3❄4 FebMarch: 0.74 in precipitation, 3.8 in snowfall 0.7❄4 MarApril: 1.46 in precipitation, 1.7 in snowfall 1.5❄2 AprMay: 2.24 in precipitation, 0.3 in snowfall 2.2 MayJune: 2.16 in precipitation 2.2 JunJuly: 2.39 in precipitation 2.4 JulAugust: 1.71 in precipitation 1.7 AugSeptember: 1.14 in precipitation 1.1 SepOctober: 1.14 in precipitation, 2.1 in snowfall 1.1❄2 OctNovember: 0.49 in precipitation, 2.7 in snowfall 0.5❄3 NovDecember: 0.29 in precipitation, 4.4 in snowfall 0.3❄4 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Ft Morgan, CO (14 mi away); precipitation: Ft Morgan, CO (14 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.

806525b
Roggen, CO · 10 mi
807015b
Fort Morgan, CO · 14 mi
806495a
Orchard, CO · 19 mi
806435b
Keenesburg, CO · 22 mi
806535a
Weldona, CO · 22 mi
806445a
Kersey, CO · 23 mi
801035b
Byers, CO · 24 mi
801365b
Strasburg, CO · 26 mi

Colorado planting zones →

Questions about 80654

What planting zone is ZIP code 80654?

ZIP code 80654 (Wiggins, CO) is in USDA hardiness zone 5a on the 2023 map: the coldest night of an average winter reaches −20 to −15 °F (−28.9 to −26.1 °C).

When is the last frost in Wiggins, CO?

The median last spring frost (32 °F) near 80654 is May 6; after May 19 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Ft Morgan station.

When is the first frost in Wiggins, CO?

The median first fall frost near 80654 is October 6, giving a median frost-free growing season of 153 days.

When should I plant tomatoes in 80654?

Start tomato seeds indoors around Mar 11 – Mar 25 and set transplants outside around May 13 – May 27, one to three weeks after the median last frost.

How much rain and snow does 80654 get?

About 14.3 inches of precipitation a year and 23 inches of snowfall (NOAA 1991–2020 normals, Ft Morgan station).

How hot do summers get in Wiggins, CO?

The average high peaks at 90 °F in July, with about 51 days a year at 90 °F or more.

What kind of soil does 80654 have?

The USDA soil survey maps Truckton at the center of ZIP 80654: loamy sand, well drained, pH about 7.0 (neutral).

Did spring come early in Wiggins, CO in 2026?

Spring leaf-out near 80654 came on Mar 1 in 2026, 26 days earlier than the 1991–2020 average (Mar 27), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Wiggins, CO?

Long-day onions: the longest day near 80654 is 15 h 02 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).