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

Planting zone for 80536 — Livermore, CO

ZIP code 80536 (Livermore, Larimer County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is May 31 and the first fall frost September 19.

Where ZIP 80536 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 frostMay 31

First frostSep 19

2012 zone5a

Was 5a 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 5b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Livermore, 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 Livermore, CO

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 31median — 50% chance of a later frost

Safe for tender plantsJune 15only 10% chance of frost after

First fall frostSeptember 19median — 10% chance by Sep 5

Growing season110 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 16 and returns around September 29.

From the NOAA station Virginia Dale 7 Ene, CO — 11 miles away, elevation 7,015 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 80536

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 19 – May 3

SpinachSow outdoors · Apr 19 – May 10

Broccoli, cabbageStart indoors · Mar 22 – Apr 5

Broccoli, cabbageTransplant · May 10 – May 24

Onion setsPlant outdoors · May 3 – May 17

PotatoesPlant outdoors · May 10 – May 24

LettuceSow outdoors · May 3 – May 17

Carrots, beetsSow outdoors · May 10 – May 24

TomatoesStart indoors · Apr 5 – Apr 19

TomatoesTransplant · Jun 7 – Jun 21

Peppers, eggplantStart indoors · Mar 22 – Apr 5

Peppers, eggplantTransplant · Jun 14 – Jun 28

BeansSow outdoors · Jun 7 – Jun 21

Sweet cornSow outdoors · Jun 7 – Jun 21

Cucumbers, squashSow outdoors · Jun 7 – Jun 21

Fall lettuce, spinachSow outdoors · Jul 25 – Aug 8

GarlicPlant cloves · Sep 5 – Oct 10

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 31) and first fall frost (Sep 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 80536 came on Mar 9 — 35 days earlier than the 1991–2020 average (Apr 13).

average
Apr 132026
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 5b in Colorado

546 plants native to the lower 48 states, recorded in Colorado, 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 Livermore, CO.

Soil in Livermore, CO

The soil mapped at the center of ZIP 80536 is Haploborolls — stony sandy loam, well drained.

TextureStony sandy loamdrains and warms fast; dries out and needs more feeding

pH6.7neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter2%moderate

Hydrologic groupCwater soaks in slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Haploborolls-Rock outcrop complex, 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 80536; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Livermore, CO

Summer high81 °Faverage high, July

Winter low15 °Faverage low, February

Hot days8days a year at 90 °F or more

Freezing nights203nights a year at 32 °F or less

Growing degree days1,553base 50 °F — the season’s usable heat

Longest day15 h 07 mindaylight on June 21

Shortest day9 h 14 mindaylight on December 21

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

Precipitation16.4 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Virginia Dale 7 Ene, CO (11 mi away); precipitation: Virginia Dale 7.2 Ssw, CO (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

820845b

Tie Siding, WY · 14 mi

805355b

Laporte, CO · 14 mi

820595b

Granite Canon, WY · 16 mi

820525b

Buford, WY · 17 mi

805455a

Red Feather Lakes, CO · 17 mi

805495b

Wellington, CO · 18 mi

805125b

Bellvue, CO · 20 mi

805115b

Estes Park, CO · 20 mi

Colorado planting zones →

Questions about 80536

What planting zone is ZIP code 80536?

ZIP code 80536 (Livermore, CO) 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 Livermore, CO?

The median last spring frost (32 °F) near 80536 is May 31; after June 15 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Virginia Dale 7 Ene station.

When is the first frost in Livermore, CO?

The median first fall frost near 80536 is September 19, giving a median frost-free growing season of 110 days.

When should I plant tomatoes in 80536?

Start tomato seeds indoors around Apr 5 – Apr 19 and set transplants outside around Jun 7 – Jun 21, one to three weeks after the median last frost.

How much rain and snow does 80536 get?

About 16.4 inches of precipitation a year (NOAA 1991–2020 normals, Virginia Dale 7.2 Ssw station).

How hot do summers get in Livermore, CO?

The average high peaks at 81 °F in July, with about 8 days a year at 90 °F or more.

What kind of soil does 80536 have?

The USDA soil survey maps Haploborolls at the center of ZIP 80536: stony sandy loam, well drained, pH about 6.7 (neutral).

Did spring come early in Livermore, CO in 2026?

Spring leaf-out near 80536 came on Mar 9 in 2026, 35 days earlier than the 1991–2020 average (Apr 13), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Livermore, CO?

Long-day onions: the longest day near 80536 is 15 h 07 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 80536 change?

Yes. The 2012 USDA map put 80536 in zone 5a; the 2023 map puts it in zone 5b. The newer map uses 1991–2020 data and more weather stations.