Last and first frost dates in Omaha

When is the last frost in Omaha?

The last frost in Omaha usually comes around 16 April: that is the median of 2016–2025, so in about half of those years the last night at or below 0 °C came later. Hardy crops start before it and frost-tender ones only after it: in the table below arugula can go into open ground from 26 March, while corn waits until 23 April. The first autumn frost follows around 26 October, about 193 days later: harvest or cover frost-tender crops before then.

When to sow and plant

Planting out: a week after the last frost once the soil is warm enough for the crop; frost-hardy crops three weeks before it; an unheated greenhouse three weeks earlier. Seedlings are sown so they are ready on that day. Each window starts on the Greenly calendar date and ends on the last day that still leaves the crop’s days to harvest (from its card) before the average first autumn frost, plus six weeks of picking for crops harvested over weeks (tomatoes, peppers, aubergines, cucumbers, courgettes, pumpkins, watermelons, beans) — our rule; earlier in the window is safer.

What planting zone is Omaha?

The official USDA map (2023, 1991–2020 data) puts the centre of Omaha (ZIP 68102) in zone 6a. Zone 6a stands for an average coldest night of -10 to -5 °F (-23.3 to -20.6 °C), so perennials hardy to zone 6a or a colder zone should come through a typical winter here.

Check the official USDA map for Omaha: USDA Plant Hardiness Zone Map.

When the soil warms up in Omaha

The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo). The soil reaches 10 °C 6 days before the last spring frost and 15 °C 10 days after it.

Frost dates near Omaha

Of the nearest cities on our list, the last spring frost ends earliest in Topeka (9 April) and latest in Sioux Falls (24 April).

Seeds, seedlings and markets in Omaha

Within 15 km of Omaha OpenStreetMap lists 8 garden centres, 1 plant nursery, 5 markets and 2 farm shops (collected 20 October 2026). The nearest garden centre to the city centre is Great Plains Botanical House, 1 km away.

• Great Plains Botanical House — garden centre
  Saint Mary's Avenue 2202, 68105 Omaha · 1 km
• Omaha Farmer's Market — market
  May Sat[1]–Oct Sat[2] Sat 08:00–12:30 · 1 km · omahafarmersmarket.com
• Exist Green — farm shop
  Underwood Avenue 4914, 68132-2414 Omaha · Tue–Fri 11:00–19:00; Sat 10:00–18:00 · 4 km · existgreen.com
• The Green House — garden centre
  South 13th Street 1234, 68108 Omaha · 2 km · thegreenhouseomaha.com
• Omaha Farmer's Market — market
  May Sun[1]–Oct Sun[2] Sun 09:00–13:00 · 7 km
• Wenninghoff's — farm shop
  Wenninghoff Road 6707, 68122 Omaha · Mon–Fri 09:00–19:00; Sat 09:00–17:00; Sun 10:00–17:00 · 11 km · linktr.ee

• Where to buy seeds and seedlings in Omaha
• Selling your own harvest in the United States

Places: © OpenStreetMap contributors, ODbL.

Weather in Omaha by month

Average weather in Omaha over 2016–2025: the warmest month is July. Months that average 20 °C or more by day: May–September (22.8–30.5 °C). Months that average 30 °C or more by day: July (30.5 °C). Nights average below 0 °C in January (-8.1 °C), February (-6.9 °C) and December (-4.8 °C). About 855 mm of rain falls in a year, on 98 days; May is the wettest month (138 mm) and February the driest (26 mm).

Average of the daily highs and lows, rain per month and days with at least 1 mm (ERA5 via Open-Meteo, the same grid cell as the frost dates).

Planted in autumn

From a month before the first autumn frost, so the roots grow before winter, to the late-planting limit on each crop’s page (about two weeks before the ground freezes, by ten years of weather).