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

Planting zone for 68137 — Omaha, NE

ZIP code 68137 (Omaha, Douglas County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is April 21 and the first fall frost October 18.

Where ZIP 68137 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.

Zone6a−10 to −5 °F
Coldest night−23.3 to −20.6 °C
Last frostApr 21
First frostOct 18
2012 zone5b

Was 5b 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 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Omaha, NE…

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 Omaha, NE

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 21median — 50% chance of a later frost
Safe for tender plantsMay 4only 10% chance of frost after
First fall frostOctober 18median — 10% chance by Oct 4
Growing season179 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 10 and returns around October 27.

From the NOAA station Gretna 4ne, NE — 5 miles away, elevation 1,240 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 68137

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 10 – Mar 24
SpinachSow outdoors · Mar 10 – Mar 31
Broccoli, cabbageStart indoors · Feb 10 – Feb 24
Broccoli, cabbageTransplant · Mar 31 – Apr 14
Onion setsPlant outdoors · Mar 24 – Apr 7
PotatoesPlant outdoors · Mar 31 – Apr 14
LettuceSow outdoors · Mar 24 – Apr 7
Carrots, beetsSow outdoors · Mar 31 – Apr 14
TomatoesStart indoors · Feb 24 – Mar 10
TomatoesTransplant · Apr 28 – May 12
Peppers, eggplantStart indoors · Feb 10 – Feb 24
Peppers, eggplantTransplant · May 5 – May 19
BeansSow outdoors · Apr 28 – May 12
Sweet cornSow outdoors · Apr 28 – May 12
Cucumbers, squashSow outdoors · Apr 28 – May 12
Fall lettuce, spinachSow outdoors · Aug 23 – Sep 6
GarlicPlant cloves · Oct 4 – Nov 8
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 21) and first fall frost (Oct 18) 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 68137 came on Mar 12 — 17 days earlier than the 1991–2020 average (Mar 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 6a in Nebraska

432 plants native to the lower 48 states, recorded in Nebraska, and rated by the USDA to survive −10 °F or colder — the bottom of zone 6a. Each links to its USDA PLANTS profile.

Trees 31

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °FAmerican sycamore100 ft · blooms spring · medium shade tolerance · to −34 °Fbitternut hickory75 ft · blooms mid spring · high shade tolerance · to −47 °Fblack locust60 ft · blooms spring · high shade tolerance · to −37 °Fblack oak80 ft · blooms early spring · medium shade tolerance · to −30 °F

Shrubs 57

alderleaf mountain mahogany15 ft · blooms late spring · medium shade tolerance · to −41 °FAmerican black currant3 ft · blooms early spring · to −46 °FAmerican hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °FAmerican plum24 ft · blooms mid spring · high shade tolerance · to −38 °Fantelope bitterbrush6 ft · blooms early spring · medium shade tolerance · to −36 °Fbig sagebrush4 ft · blooms mid summer · high shade tolerance · to −43 °F

Wildflowers & perennials 198

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °Falpine sweetvetch2 ft · blooms early summer · high shade tolerance · to −62 °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 °FAmerican speedwell0.8 ft · blooms mid summer · low shade tolerance · to −38 °F

Grasses 130

alkali cordgrass3 ft · blooms late summer · high shade tolerance · to −38 °Falkali sacaton3 ft · blooms mid summer · high shade tolerance · to −38 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °Fbasin wildrye5 ft · blooms early spring · high shade tolerance · to −43 °Fbeaked spikerush3 ft · blooms late spring · high shade tolerance · to −28 °FBebb's sedge3 ft · blooms late spring · low shade tolerance · to −38 °F

Vines 8

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °Friverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °Fsummer grape30 ft · blooms late spring · low shade tolerance · to −23 °Ftrumpet creeper2 ft · blooms summer · high shade tolerance · to −13 °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 Omaha, NE.

Soil in Omaha, NE

The soil mapped at the center of ZIP 68137 is Udarents — silt loam. Much of the area is built over (urban land); this is the natural soil underneath.

TextureSilt loama good balance for most vegetables
pH7.2neutral; most vegetables like 6.0–7.0
Organic matter0.5%low — add compost
Farmland classNot prime farmlandUSDA classification

Map unit: Urban land-Udarents complex, 0 to 16 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 68137; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Omaha, NE

Summer high86 °Faverage high, July
Winter low14 °Faverage low, January
Hot days26days a year at 90 °F or more
Freezing nights136nights a year at 32 °F or less
Growing degree days3,408base 50 °F — the season’s usable heat
Longest day15 h 09 mindaylight on June 21
Shortest day9 h 12 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation33 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 32 °F, low 14 °F 32°14° JanFebruary: average high 37 °F, low 18 °F 37°18° FebMarch: average high 50 °F, low 28 °F 50°28° MarApril: average high 62 °F, low 39 °F 62°39° AprMay: average high 72 °F, low 51 °F 72°51° MayJune: average high 83 °F, low 62 °F 83°62° JunJuly: average high 86 °F, low 66 °F 86°66° JulAugust: average high 84 °F, low 64 °F 84°64° AugSeptember: average high 77 °F, low 54 °F 77°54° SepOctober: average high 64 °F, low 42 °F 64°42° OctNovember: average high 49 °F, low 29 °F 49°29° NovDecember: average high 37 °F, low 19 °F 37°19° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 0.81 in precipitation 0.8 JanFebruary: 0.99 in precipitation 1.0 FebMarch: 1.89 in precipitation 1.9 MarApril: 3.43 in precipitation 3.4 AprMay: 4.77 in precipitation 4.8 MayJune: 4.83 in precipitation 4.8 JunJuly: 3.82 in precipitation 3.8 JulAugust: 3.82 in precipitation 3.8 AugSeptember: 3.14 in precipitation 3.1 SepOctober: 2.74 in precipitation 2.7 OctNovember: 1.43 in precipitation 1.4 NovDecember: 1.37 in precipitation 1.4 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Gretna 4ne, NE (5 mi away); precipitation: La Vista 2.0 Wsw, NE (3 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6a.

681446a
Omaha, NE · 2 mi
681286a
La Vista, NE · 3 mi
681276a
Omaha, NE · 3 mi
681386a
Omaha, NE · 3 mi
680106a
Boys Town, NE · 4 mi
681356a
Omaha, NE · 4 mi
681246a
Omaha, NE · 4 mi
681546a
Omaha, NE · 4 mi

All 45 ZIP codes in Omaha → · Nebraska planting zones →

Questions about 68137

What planting zone is ZIP code 68137?

ZIP code 68137 (Omaha, NE) is in USDA hardiness zone 6a on the 2023 map: the coldest night of an average winter reaches −10 to −5 °F (−23.3 to −20.6 °C).

When is the last frost in Omaha, NE?

The median last spring frost (32 °F) near 68137 is April 21; after May 4 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Gretna 4ne station.

When is the first frost in Omaha, NE?

The median first fall frost near 68137 is October 18, giving a median frost-free growing season of 179 days.

When should I plant tomatoes in 68137?

Start tomato seeds indoors around Feb 24 – Mar 10 and set transplants outside around Apr 28 – May 12, one to three weeks after the median last frost.

How much rain and snow does 68137 get?

About 33 inches of precipitation a year (NOAA 1991–2020 normals, La Vista 2.0 Wsw station).

How hot do summers get in Omaha, NE?

The average high peaks at 86 °F in July, with about 26 days a year at 90 °F or more.

What kind of soil does 68137 have?

The USDA soil survey maps Udarents at the center of ZIP 68137: silt loam, pH about 7.2 (neutral).

Did spring come early in Omaha, NE in 2026?

Spring leaf-out near 68137 came on Mar 12 in 2026, 17 days earlier than the 1991–2020 average (Mar 29), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Omaha, NE?

Long-day onions: the longest day near 68137 is 15 h 09 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 68137 change?

Yes. The 2012 USDA map put 68137 in zone 5b; the 2023 map puts it in zone 6a. The newer map uses 1991–2020 data and more weather stations.