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

Planting zone for 80652 — Roggen, CO

ZIP code 80652 (Roggen, Weld County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is May 6 and the first fall frost October 6.

Where ZIP 80652 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 6
First frostOct 6
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 Roggen, 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 Roggen, 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 — 23 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 80652

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 80652 came on Mar 1 — 25 days earlier than the 1991–2020 average (Mar 26).

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).

Soil in Roggen, CO

The soil mapped at the center of ZIP 80652 is Valent — sand, excessively drained.

TextureSanddrains and warms fast; dries out and needs more feeding
pH6.6neutral; most vegetables like 6.0–7.0
DrainageExcessively drainednatural drainage class
Organic matter0.9%low — add compost
Hydrologic groupAwater soaks in fast
Farmland classFarmland of local importanceUSDA classification

Map unit: Valent sand, 0 to 3 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 80652; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Roggen, 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)
Precipitation14.2 inper year, rain and melted snow

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

0″1″2″3″January: 0.33 in precipitation 0.3 JanFebruary: 0.30 in precipitation 0.3 FebMarch: 1.01 in precipitation 1.0 MarApril: 1.64 in precipitation 1.6 AprMay: 2.75 in precipitation 2.8 MayJune: 1.69 in precipitation 1.7 JunJuly: 1.63 in precipitation 1.6 JulAugust: 1.58 in precipitation 1.6 AugSeptember: 1.17 in precipitation 1.2 SepOctober: 1.14 in precipitation 1.1 OctNovember: 0.57 in precipitation 0.6 NovDecember: 0.40 in precipitation 0.4 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Ft Morgan, CO (23 mi away); precipitation: Kersey 4.5 E, CO (20 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.

806545a
Wiggins, CO · 10 mi
806435b
Keenesburg, CO · 11 mi
806445a
Kersey, CO · 16 mi
806495a
Orchard, CO · 19 mi
806425b
Hudson, CO · 19 mi
806245a
Gill, CO · 22 mi
806455a
La Salle, CO · 22 mi
801365b
Strasburg, CO · 24 mi

Colorado planting zones →

Questions about 80652

What planting zone is ZIP code 80652?

ZIP code 80652 (Roggen, 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 Roggen, CO?

The median last spring frost (32 °F) near 80652 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 Roggen, CO?

The median first fall frost near 80652 is October 6, giving a median frost-free growing season of 153 days.

When should I plant tomatoes in 80652?

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 80652 get?

About 14.2 inches of precipitation a year (NOAA 1991–2020 normals, Kersey 4.5 E station).

How hot do summers get in Roggen, 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 80652 have?

The USDA soil survey maps Valent at the center of ZIP 80652: sand, excessively drained, pH about 6.6 (neutral).

Did spring come early in Roggen, CO in 2026?

Spring leaf-out near 80652 came on Mar 1 in 2026, 25 days earlier than the 1991–2020 average (Mar 26), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Roggen, CO?

Long-day onions: the longest day near 80652 is 15 h 02 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 80652 change?

Yes. The 2012 USDA map put 80652 in zone 5a; the 2023 map puts it in zone 5b. The newer map uses 1991–2020 data and more weather stations.