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

Planting zone for 81248 — Sargents, CO

ZIP code 81248 (Sargents, Saguache County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is June 21 and the first fall frost September 5.

Where ZIP 81248 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 frostJun 21
First frostSep 5
2012 zone4b

Was 4b 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 5b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Sargents, 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 Sargents, CO

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostJune 21median — 50% chance of a later frost
Safe for tender plantsJuly 7only 10% chance of frost after
First fall frostSeptember 5median — 10% chance by Aug 21
Growing season74 daysfrost-free, median

A hard freeze (28 °F) usually ends around June 7 and returns around September 16.

From the NOAA station Cochetopa Creek, CO — 14 miles away, elevation 8,006 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 81248

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · May 10 – May 24
SpinachSow outdoors · May 10 – May 31
Broccoli, cabbageStart indoors · Apr 12 – Apr 26
Broccoli, cabbageTransplant · May 31 – Jun 14
Onion setsPlant outdoors · May 24 – Jun 7
PotatoesPlant outdoors · May 31 – Jun 14
LettuceSow outdoors · May 24 – Jun 7
Carrots, beetsSow outdoors · May 31 – Jun 14
TomatoesStart indoors · Apr 26 – May 10
TomatoesTransplant · Jun 28 – Jul 12
Peppers, eggplantStart indoors · Apr 12 – Apr 26
Peppers, eggplantTransplant · Jul 5 – Jul 19
BeansSow outdoors · Jun 28 – Jul 12
Sweet cornSow outdoors · Jun 28 – Jul 12
Cucumbers, squashSow outdoors · Jun 28 – Jul 12
Fall lettuce, spinachSow outdoors · Jul 11 – Jul 25
GarlicPlant cloves · Aug 22 – Sep 26
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Jun 21) and first fall frost (Sep 5) 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 81248 came on Apr 15 — 19 days earlier than the 1991–2020 average (May 4).

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.

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 98

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 246

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 163

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 Sargents, CO.

Soil in Sargents, CO

The soil mapped at the center of ZIP 81248 is Piloni — very gravelly loamy sand, somewhat excessively drained.

TextureVery gravelly loamy sanddrains and warms fast; dries out and needs more feeding
pH6.7neutral; most vegetables like 6.0–7.0
DrainageSomewhat excessively drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Piloni very gravelly loamy sand, 15 to 65 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 81248; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Sargents, CO

Summer high82 °Faverage high, July
Winter low−5 °Faverage low, January
Hot days4days a year at 90 °F or more
Freezing nights295nights a year at 32 °F or less
Growing degree days782base 50 °F — the season’s usable heat
Longest day14 h 51 mindaylight on June 21
Shortest day9 h 29 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation14.8 inper year, rain and melted snow
Snowfall105 inper year

Average high and low, by month

−20°−10°0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 33 °F, low -5 °F 33°−5° JanFebruary: average high 37 °F, low -3 °F 37°−3° FebMarch: average high 45 °F, low 9 °F 45°9° MarApril: average high 54 °F, low 20 °F 54°20° AprMay: average high 65 °F, low 26 °F 65°26° MayJune: average high 76 °F, low 32 °F 76°32° JunJuly: average high 82 °F, low 39 °F 82°39° JulAugust: average high 79 °F, low 37 °F 79°37° AugSeptember: average high 73 °F, low 28 °F 73°28° SepOctober: average high 61 °F, low 17 °F 61°17° OctNovember: average high 46 °F, low 8 °F 46°8° NovDecember: average high 34 °F, low -4 °F 34°−4° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″January: 1.27 in precipitation, 21.5 in snowfall 1.3❄22 JanFebruary: 1.28 in precipitation, 19 in snowfall 1.3❄19 FebMarch: 1.21 in precipitation, 14.6 in snowfall 1.2❄15 MarApril: 1.47 in precipitation, 12.1 in snowfall 1.5❄12 AprMay: 1.23 in precipitation, 2.7 in snowfall 1.2❄3 MayJune: 0.76 in precipitation, 0.2 in snowfall 0.8 JunJuly: 1.63 in precipitation 1.6 JulAugust: 1.59 in precipitation 1.6 AugSeptember: 1.30 in precipitation, 0.2 in snowfall 1.3 SepOctober: 0.98 in precipitation, 3.6 in snowfall 1.0❄4 OctNovember: 0.90 in precipitation, 11.8 in snowfall 0.9❄12 NovDecember: 1.13 in precipitation, 19.6 in snowfall 1.1❄20 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Sargents, CO (4 mi away); precipitation: Sargents, CO (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

812394b
Parlin, CO · 10 mi
812275b
Monarch, CO · 14 mi
812375a
Ohio City, CO · 15 mi
812415a
Pitkin, CO · 15 mi
812365b
Nathrop, CO · 22 mi
812015b
Salida, CO · 23 mi
812426a
Poncha Springs, CO · 23 mi
811495b
Saguache, CO · 24 mi

Colorado planting zones →

Questions about 81248

What planting zone is ZIP code 81248?

ZIP code 81248 (Sargents, 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 Sargents, CO?

The median last spring frost (32 °F) near 81248 is June 21; after July 7 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Cochetopa Creek station.

When is the first frost in Sargents, CO?

The median first fall frost near 81248 is September 5, giving a median frost-free growing season of 74 days.

When should I plant tomatoes in 81248?

Start tomato seeds indoors around Apr 26 – May 10 and set transplants outside around Jun 28 – Jul 12, one to three weeks after the median last frost.

How much rain and snow does 81248 get?

About 14.8 inches of precipitation a year and 105 inches of snowfall (NOAA 1991–2020 normals, Sargents station).

How hot do summers get in Sargents, CO?

The average high peaks at 82 °F in July, with about 4 days a year at 90 °F or more.

What kind of soil does 81248 have?

The USDA soil survey maps Piloni at the center of ZIP 81248: very gravelly loamy sand, somewhat excessively drained, pH about 6.7 (neutral).

Did spring come early in Sargents, CO in 2026?

Spring leaf-out near 81248 came on Apr 15 in 2026, 19 days earlier than the 1991–2020 average (May 4), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Sargents, CO?

Intermediate onions: the longest day near 81248 is 14 h 51 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 81248 change?

Yes. The 2012 USDA map put 81248 in zone 4b; the 2023 map puts it in zone 5b. The newer map uses 1991–2020 data and more weather stations.