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

Planting zone for 52050 — Greeley, IA

ZIP code 52050 (Greeley, Delaware County) is in USDA zone 4b: the coldest winter night averages −25 to −20 °F. The median last spring frost is May 3 and the first fall frost October 4.

Where ZIP 52050 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.

Zone4b−25 to −20 °F
Coldest night−31.7 to −28.9 °C
Last frostMay 3
First frostOct 4
2012 zone4b

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 4b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Greeley, IA…

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 Greeley, IA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 3median — 50% chance of a later frost
Safe for tender plantsMay 16only 10% chance of frost after
First fall frostOctober 4median — 10% chance by Sep 22
Growing season154 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 23 and returns around October 15.

From the NOAA station Manchester #2, IA — 11 miles away, elevation 991 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 52050

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 22 – Apr 5
SpinachSow outdoors · Mar 22 – Apr 12
Broccoli, cabbageStart indoors · Feb 22 – Mar 8
Broccoli, cabbageTransplant · Apr 12 – Apr 26
Onion setsPlant outdoors · Apr 5 – Apr 19
PotatoesPlant outdoors · Apr 12 – Apr 26
LettuceSow outdoors · Apr 5 – Apr 19
Carrots, beetsSow outdoors · Apr 12 – Apr 26
TomatoesStart indoors · Mar 8 – Mar 22
TomatoesTransplant · May 10 – May 24
Peppers, eggplantStart indoors · Feb 22 – Mar 8
Peppers, eggplantTransplant · May 17 – May 31
BeansSow outdoors · May 10 – May 24
Sweet cornSow outdoors · May 10 – May 24
Cucumbers, squashSow outdoors · May 10 – May 24
Fall lettuce, spinachSow outdoors · Aug 9 – Aug 23
GarlicPlant cloves · Sep 20 – Oct 25
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 3) and first fall frost (Oct 4) 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 52050 came on Mar 28 — 16 days earlier than the 1991–2020 average (Apr 13).

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 4b in Iowa

426 plants native to the lower 48 states, recorded in Iowa, and rated by the USDA to survive −25 °F or colder — the bottom of zone 4b. Each links to its USDA PLANTS profile.

Trees 43

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican chestnut115 ft · blooms early summer · high shade tolerance · to −33 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °FAmerican sycamore100 ft · blooms spring · medium shade tolerance · to −34 °Farborvitae50 ft · blooms mid spring · medium shade tolerance · to −33 °Fbalsam fir60 ft · blooms mid summer · low shade tolerance · to −43 °F

Shrubs 72

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °FAllegheny serviceberry35 ft · blooms early spring · low shade tolerance · to −38 °Falternateleaf dogwood25 ft · blooms mid spring · low shade tolerance · to −47 °FAmerican black currant3 ft · blooms early spring · to −46 °FAmerican hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °FAmerican hornbeam30 ft · blooms mid spring · low shade tolerance · to −34 °F

Wildflowers & perennials 169

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °FAmerican bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican licorice4 ft · blooms late spring · medium shade tolerance · to −38 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °FAmerican pokeweed7 ft · blooms mid summer · low shade tolerance · to −33 °F

Grasses 124

arctic brome3 ft · blooms early summer · low shade tolerance · to −33 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °FBebb's sedge3 ft · blooms late spring · low shade tolerance · to −38 °FBicknell's sedge3 ft · blooms late spring · low shade tolerance · to −38 °Fbig bluestem6 ft · blooms summer · high shade tolerance · to −46 °Fblue grama1 ft · blooms early summer · high shade tolerance · to −43 °F

Vines 5

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Friverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °Ftrumpet honeysuckle16 ft · blooms late summer · low shade tolerance · to −33 °FVirginia creeper1 ft · blooms late spring · medium shade tolerance · to −28 °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 Greeley, IA.

Soil in Greeley, IA

The soil mapped at the center of ZIP 52050 is Fayette — silt loam, well drained.

TextureSilt loama good balance for most vegetables
pH6.2slightly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2%moderate
Hydrologic groupCwater soaks in slowly
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Fayette silt loam, 14 to 18 percent slopes, moderately eroded.

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 52050; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Greeley, IA

Summer high82 °Faverage high, July
Winter low8 °Faverage low, January
Hot days9days a year at 90 °F or more
Freezing nights158nights a year at 32 °F or less
Growing degree days2,660base 50 °F — the season’s usable heat
Longest day15 h 19 mindaylight on June 21
Shortest day9 h 03 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation38.6 inper year, rain and melted snow
Snowfall35 inper year; 66 days with snow on the ground

Average high and low, by month

0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 26 °F, low 8 °F 26°8° JanFebruary: average high 31 °F, low 12 °F 31°12° FebMarch: average high 44 °F, low 24 °F 44°24° MarApril: average high 58 °F, low 35 °F 58°35° AprMay: average high 70 °F, low 47 °F 70°47° MayJune: average high 79 °F, low 58 °F 79°58° JunJuly: average high 82 °F, low 61 °F 82°61° JulAugust: average high 80 °F, low 58 °F 80°58° AugSeptember: average high 74 °F, low 49 °F 74°49° SepOctober: average high 61 °F, low 37 °F 61°37° OctNovember: average high 45 °F, low 26 °F 45°26° NovDecember: average high 32 °F, low 15 °F 32°15° Dec

Precipitation by month inches · ❄ = snowfall

0″2″4″6″January: 1.14 in precipitation, 9.2 in snowfall 1.1❄9 JanFebruary: 1.35 in precipitation, 8.7 in snowfall 1.4❄9 FebMarch: 2.10 in precipitation, 4.2 in snowfall 2.1❄4 MarApril: 3.82 in precipitation, 1.4 in snowfall 3.8❄1 AprMay: 4.49 in precipitation 4.5 MayJune: 6.02 in precipitation 6.0 JunJuly: 4.79 in precipitation 4.8 JulAugust: 4.13 in precipitation 4.1 AugSeptember: 3.84 in precipitation 3.8 SepOctober: 3.11 in precipitation, 0.4 in snowfall 3.1 OctNovember: 2.20 in precipitation, 2.3 in snowfall 2.2❄2 NovDecember: 1.58 in precipitation, 8.5 in snowfall 1.6❄9 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Manchester #2, IA (11 mi away); precipitation: Manchester #2, IA (11 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.

520424b
Edgewood, IA · 5 mi
520415a
Earlville, IA · 8 mi
520355a
Colesburg, IA · 8 mi
520485a
Garber, IA · 9 mi
520364b
Delaware, IA · 10 mi
520575a
Manchester, IA · 10 mi
520444b
Elkport, IA · 11 mi
520764b
Strawberry Point, IA · 11 mi

Iowa planting zones →

Questions about 52050

What planting zone is ZIP code 52050?

ZIP code 52050 (Greeley, IA) is in USDA hardiness zone 4b on the 2023 map: the coldest night of an average winter reaches −25 to −20 °F (−31.7 to −28.9 °C).

When is the last frost in Greeley, IA?

The median last spring frost (32 °F) near 52050 is May 3; after May 16 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Manchester #2 station.

When is the first frost in Greeley, IA?

The median first fall frost near 52050 is October 4, giving a median frost-free growing season of 154 days.

When should I plant tomatoes in 52050?

Start tomato seeds indoors around Mar 8 – Mar 22 and set transplants outside around May 10 – May 24, one to three weeks after the median last frost.

How much rain and snow does 52050 get?

About 38.6 inches of precipitation a year and 35 inches of snowfall (NOAA 1991–2020 normals, Manchester #2 station).

How hot do summers get in Greeley, IA?

The average high peaks at 82 °F in July, with about 9 days a year at 90 °F or more.

What kind of soil does 52050 have?

The USDA soil survey maps Fayette at the center of ZIP 52050: silt loam, well drained, pH about 6.2 (slightly acidic).

Did spring come early in Greeley, IA in 2026?

Spring leaf-out near 52050 came on Mar 28 in 2026, 16 days earlier than the 1991–2020 average (Apr 13), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Greeley, IA?

Long-day onions: the longest day near 52050 is 15 h 19 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).