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

Planting zone for Woodland Park, CO

Woodland Park, CO is in USDA zones 5a to 5b across its 2 ZIP codes. The median last spring frost is June 1 and the first fall frost September 21.

Woodland Park on the zone map

Outlined: its 1 ZIP code areas · 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.

Zones5a–5b−20 to −10 °F
ZIP codes2
Last frostJun 1
First frostSep 21
Growing season110 days

5a 1 ZIP   5b 1 ZIP

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Woodland Park, 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 Woodland Park, CO

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostJune 1median — 50% chance of a later frost
Safe for tender plantsJune 17only 10% chance of frost after
First fall frostSeptember 21median — 10% chance by Sep 7
Growing season110 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 21 and returns around September 30.

From the NOAA station Divide 4nw, CO, elevation 9,134 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 Woodland Park

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Apr 20 – May 4
SpinachSow outdoors · Apr 20 – May 11
Broccoli, cabbageStart indoors · Mar 23 – Apr 6
Broccoli, cabbageTransplant · May 11 – May 25
Onion setsPlant outdoors · May 4 – May 18
PotatoesPlant outdoors · May 11 – May 25
LettuceSow outdoors · May 4 – May 18
Carrots, beetsSow outdoors · May 11 – May 25
TomatoesStart indoors · Apr 6 – Apr 20
TomatoesTransplant · Jun 8 – Jun 22
Peppers, eggplantStart indoors · Mar 23 – Apr 6
Peppers, eggplantTransplant · Jun 15 – Jun 29
BeansSow outdoors · Jun 8 – Jun 22
Sweet cornSow outdoors · Jun 8 – Jun 22
Cucumbers, squashSow outdoors · Jun 8 – Jun 22
Fall lettuce, spinachSow outdoors · Jul 27 – Aug 10
GarlicPlant cloves · Sep 7 – Oct 12
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Jun 1) and first fall frost (Sep 21) 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 80863 came on Mar 20 — 40 days earlier than the 1991–2020 average (Apr 29).

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 Woodland Park, CO.

Soil in Woodland Park, CO

The soil mapped at the center of ZIP 80863 is Plome — moderately decomposed plant material, well drained.

TextureModerately decomposed plant materialtop layer
pH5.8moderately acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter45%high
Hydrologic groupBwater soaks in moderately
Farmland classNot prime farmlandUSDA classification

Map unit: Plome-Pimsby complex, 5 to 40 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 80863; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Woodland Park, CO

Summer high74 °Faverage high, July
Winter low9 °Faverage low, January
Hot days0days a year at 90 °F or more
Freezing nights216nights a year at 32 °F or less
Growing degree days889base 50 °F — the season’s usable heat
Longest day14 h 55 mindaylight on June 21
Shortest day9 h 25 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation21.4 inper year, rain and melted snow

Average high and low, by month

0°10°20°30°40°50°60°70°80°32 °FJanuary: average high 33 °F, low 9 °F 33°9° JanFebruary: average high 34 °F, low 11 °F 34°11° FebMarch: average high 41 °F, low 18 °F 41°18° MarApril: average high 47 °F, low 23 °F 47°23° AprMay: average high 57 °F, low 31 °F 57°31° MayJune: average high 69 °F, low 41 °F 69°41° JunJuly: average high 74 °F, low 47 °F 74°47° JulAugust: average high 71 °F, low 45 °F 71°45° AugSeptember: average high 65 °F, low 39 °F 65°39° SepOctober: average high 54 °F, low 27 °F 54°27° OctNovember: average high 42 °F, low 18 °F 42°18° NovDecember: average high 33 °F, low 12 °F 33°12° Dec

Precipitation by month inches

0″1″2″3″4″January: 0.75 in precipitation 0.8 JanFebruary: 0.87 in precipitation 0.9 FebMarch: 1.91 in precipitation 1.9 MarApril: 2.30 in precipitation 2.3 AprMay: 2.44 in precipitation 2.4 MayJune: 1.68 in precipitation 1.7 JunJuly: 3.49 in precipitation 3.5 JulAugust: 3.07 in precipitation 3.1 AugSeptember: 1.85 in precipitation 1.9 SepOctober: 1.34 in precipitation 1.3 OctNovember: 0.83 in precipitation 0.8 NovDecember: 0.90 in precipitation 0.9 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Divide 4nw, CO (10 mi away); precipitation: Palmer Lake, CO (9 mi away). Daylight is calculated from latitude.

ZIP codes in Woodland Park

808635b
−15 to −10 °F
808665a
−20 to −15 °F

Colorado planting zones →

Questions about Woodland Park

What planting zone is Woodland Park, CO?

Woodland Park, CO is in USDA hardiness zones 5a to 5b on the 2023 map (5a: −20 to −15 °F; 5b: −15 to −10 °F).

When is the last frost in Woodland Park, CO?

The median last spring frost is June 1 and the median first fall frost is September 21 (NOAA 1991–2020 normals, Divide 4nw station).

When can I plant a garden in Woodland Park, CO?

Cool-season crops like peas and spinach go in around Apr 20 – May 11; tomatoes, peppers, beans and squash after about Jun 8, once frost risk has passed.

What kind of onions grow in Woodland Park, CO?

Intermediate onions: the longest day is 14 h 55 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

How much rain and snow does Woodland Park, CO get?

About 21.4 inches of precipitation a year (NOAA 1991–2020 normals).