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Last and first frost dates in Las Vegas

United States

In Las Vegas the last spring frost usually comes around 6 February and the first autumn frost around 12 December, which leaves about 309 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground from 13 March to 22 August.

Last spring frostaround 6 February
First autumn frostaround 12 December
Frost-free days309 days
Hardiness zone (USDA-equivalent)official USDA map: 9b

Median of 2016–2025 for the 25 km grid cell of the city: the last day at or below 0 °C in spring and the first in autumn (ERA5 reanalysis via Open-Meteo). In a cold year a frost can come a week or two later — Greenly warns 48 hours ahead.

When is the last frost in Las Vegas?

The last frost in Las Vegas usually comes around 6 February: 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 16 January, while corn waits until 14 February. The first autumn frost follows around 12 December, about 309 days later: harvest or cover frost-tender crops before then.

When to sow and plant

CropSow for seedlingsPlant out in a greenhouseOpen ground
Achocha14 December – 3 September23 January – 13 October13 February – 13 October
Ageratumfrom 26 December—from 13 March
Arugula——sow 16 January – 7 November
Basil1 February – 10 October11 March – 17 November1 April – 17 November
Beet——sow 16 January – 13 October
Bell Pepper10 January – 23 June11 March – 22 August1 April – 22 August
Black-eyed Susanfrom 22 November—from 13 February
Bok Choy19 December – 21 October23 January – 25 November13 February – 25 November
Borage——sow 13 February – 18 October
Broad bean——sow 16 January – 3 September
Broccoli——sow 16 January – 27 August
Brussels Sprouts11 November – 25 July26 December – 8 September16 January – 8 September
Busy Lizziefrom 21 November—from 13 February
Cabbage——sow 16 January – 4 August
Calendula——sow from 16 January
Carrot——sow 16 January – 19 September
Cauliflower14 November – 27 August26 December – 8 October16 January – 8 October
Celeriac7 November – 24 June23 January – 9 September13 February – 9 September
Celery7 November – 4 July23 January – 19 September13 February – 19 September
Celosiafrom 18 Januaryfrom 4 Marchfrom 25 March
Chamomile——sow 16 January – 8 October
Chayote28 October – 17 June24 January – 13 September14 February – 13 September
Chickpea——sow 16 January – 24 August
Chicory1 December – 18 September—16 January – 13 October
Chili Pepper10 January – 30 July11 March – 28 September1 April – 28 September
China asterfrom 18 Januaryfrom 11 Marchfrom 1 April
Chives——sow 16 January – 29 September
Cilantro——sow 16 January – 9 October
Corn——sow 14 February – 24 August
Corn poppy——sow from 16 January
Cosmosfrom 18 Januaryfrom 4 Marchfrom 25 March
Cucumber11 February – 30 August11 March – 27 September1 April – 27 September
Daikon——sow 16 January – 6 October
Delphiniumfrom 28 October—from 16 January
Dill——sow 16 January – 19 October
Edging lobeliafrom 21 November—from 13 February
Eggplant10 January – 23 June11 March – 22 August1 April – 22 August
Florence fennel9 December – 3 September23 January – 18 October13 February – 18 October
Foxglovefrom 10 October—from 16 January
Garden sorrel——sow 16 January – 7 October
Green Beans——sow 25 March – 1 September
Hollyhock——sow from 16 January
Hyssop——sow 16 January – 30 August
Kale——sow 16 January – 1 October
Kiwano19 January – 6 September20 February – 8 October13 March – 8 October
Kohlrabi——sow 16 January – 11 October
Leek17 October – 15 June26 December – 24 August16 January – 24 August
Lemon balm——sow 16 January – 3 October
Lettuce——sow 16 January – 16 October
Lisianthusfrom 30 Septemberfrom 26 Decemberfrom 16 January
Lovage——sow from 16 January
Luffa28 January – 1 July11 March – 12 August1 April – 12 August
Marigoldfrom 12 Decemberfrom 23 Januaryfrom 13 February
Marjoram10 January – 18 September—1 April – 17 November
Melon11 February – 17 August11 March – 14 September1 April – 14 September
Microgreens——sow 25 March – 28 November
Moringa20 January – 23 September16 March – 17 November6 April – 17 November
Moss rosefrom 28 November—from 13 February
Mustard greens——sow 16 January – 28 October
Napa cabbage21 December – 28 September23 January – 31 October13 February – 31 October
Nasturtiumfrom 16 Decemberfrom 23 Januaryfrom 13 February
Okra28 January – 11 September11 March – 23 October1 April – 23 October
Oregano27 October – 8 September26 December – 7 November16 January – 7 November
Pansyfrom 31 Octoberfrom 26 Decemberfrom 16 January
Parsley——sow 16 January – 27 September
Parsnip——sow 16 January – 16 August
Peanut2 February – 7 August11 March – 13 September1 April – 13 September
Peas——sow 16 January – 29 September
Petuniafrom 7 Januaryfrom 11 Marchfrom 1 April
Physalis6 January – 4 August20 February – 18 September13 March – 18 September
Pumpkin28 January – 6 July11 March – 17 August1 April – 17 August
Purple coneflowerfrom 25 October—from 16 January
Radish——sow 16 January – 12 November
Sage7 November – 4 September26 December – 23 October16 January – 23 October
Scarlet sagefrom 30 December—from 13 March
Snapdragonfrom 22 Octoberfrom 26 Decemberfrom 16 January
Soybean——sow 1 April – 23 September
Spinach——sow 16 January – 18 October
Stevia2 January – 26 July20 February – 13 September13 March – 13 September
Stock——sow from 16 January
Sunflower——sow from 25 March
Sweet alyssum——sow from 16 January
Sweet Corn12 January – 18 September3 February – 10 October24 February – 10 October
Sweet peafrom 14 Novemberfrom 26 Decemberfrom 16 January
Sweet William——sow from 16 January
Swiss Chard——sow 16 January – 13 October
Thyme——sow 16 January – 24 August
Tomato30 December – 1 July20 February – 22 August13 March – 22 August
Turnip——sow 16 January – 15 October
Watercress——sow 16 January – 26 October
Watermelon11 February – 5 August11 March – 2 September1 April – 2 September
Zinniafrom 9 Februaryfrom 16 Marchfrom 6 April
Zucchini18 February – 4 September11 March – 25 September1 April – 25 September

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 Las Vegas?

The official USDA map (2023, 1991–2020 data) puts the centre of Las Vegas (ZIP 89101) in zone 9b. Zone 9b stands for an average coldest night of 25 to 30 °F (-3.9 to -1.1 °C), so perennials hardy to zone 9b or a colder zone should come through a typical winter here.

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

When the soil warms up in Las Vegas

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 3 days before the last spring frost and 15 °C 35 days after it.

SoilDateAgainst the last spring frost
5 °Calready in the first week of January—
10 °C3 February3 days earlier
15 °C13 March35 days later
18 °C1 April54 days later

Frost dates near Las Vegas

Of the nearest cities on our list, the last spring frost ends earliest in Riverside (12 January) and latest in Flagstaff (5 May).

CityDistanceLast spring frostFirst autumn frost
St. George173 km7 March20 November
Riverside321 km12 January19 December
Flagstaff336 km5 May21 October
Bakersfield361 km16 February14 December
Los Angeles368 km——

Seeds, seedlings and markets in Las Vegas

Within 15 km of Las Vegas OpenStreetMap lists 10 garden centres, 1 plant nursery and 1 market (collected 20 October 2026). The nearest garden centre to the city centre is Desert Living Center, 5 km away.

Places: © OpenStreetMap contributors, ODbL.

What to grow at home in winter in Las Vegas

Frosts in Las Vegas usually come from about 12 December to about 6 February. These plants have indoor care in their Greenly cards and are harvested quickly, so they can be sown on a windowsill in winter.

Weather in Las Vegas by month

Average weather in Las Vegas over 2016–2025: the warmest month is July. Months that average 20 °C or more by day: March–October (20.2–40.1 °C). Months that average 30 °C or more by day: May–September (30.6–40.1 °C). No month averages below 0 °C at night; the coldest nights, in January, average 4.1 °C. About 159 mm of rain falls in a year, on 27 days; January is the wettest month (27 mm) and June the driest (2 mm).

MonthDay, °CNight, °CRain, mmRainy days
January13.24.1274
February16.55.5254
March20.28.5214
April26.513.252
May30.616.882
June37.52320
July40.126.482
August38.525.1142
September34.221.281
October2714.581
November198.6142
December13.84.8193

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

CropWhen to plant
Bearded Irisby 12 November
Crocusby 12 November
Daffodilby 12 November
Garlic12 November – end of December
Grape hyacinthby 12 November
Helleboreby 12 November
Hyacinthby 12 November
Lilyby 12 November
Ornamental onionby 12 November
Peonyby 12 November
Saffronby 12 November
Snowdropby 12 November
Tulipby 12 November
Wild garlicby 12 November

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).