When is the last frost in Las Vegas, NV?

The average last spring frost (50% probability of 32°F) in Las Vegas is around January 24, based on NOAA/NCEI 1991–2020 normals at the Las Vegas Air Terminal, NV station (5 mi away). Half of years it falls outside that date, so wait 1–2 weeks past it before setting out frost-tender plants.

When is the first fall frost in Las Vegas?

The average first fall frost in Las Vegas, NV is around December 10, giving roughly a 323-day frost-free growing season.

What planting zone is Las Vegas, NV?

Las Vegas is in USDA plant hardiness zone 9a (average annual extreme minimum temperature 20 to 25°F), from the 2023 USDA Plant Hardiness Zone Map.

What is the weather like in Las Vegas?

In Las Vegas, NV the warmest month is July (avg high 104.5°F) and the coldest is December (avg low 39.6°F). It averages about 4.2″ of precipitation a year and 0.2″ of snow.

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Las Vegas, NV Planting Calendar & Frost Dates

USDA hardiness zone 9a · ZIP 89146 · elevation 650′ · NOAA & USDA data

Las Vegas is in USDA hardiness zone 9a (winters can dip to 20 to 25°F), with a growing season of about 323 days between the average last spring frost (January 24) and first fall frost (December 10). The warmest month is July (avg high 104.5°F); the coldest is December (avg low 39.6°F). It averages 4.2″ of precipitation a year and 0.2″ of snow, mostly mid-winter. Start cool-season crops several weeks before the last frost; wait until after it for tomatoes, peppers and other tender crops.

Hardiness zone

min temp 20 to 25°F

Last spring frost

January 24

avg (50% prob, 32°F)

First fall frost

December 10

avg (50% prob, 32°F)

Growing season

323 days

frost-free window

Warmest month

July

avg high 104.5°F

Month-by-month typical weather in Las Vegas

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Las Vegas Mccarran Ap, NV (6.1 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	58.5	40.5	49.5	0.6	0
February	62.9	44.1	53.5	0.8	0
March	71.1	50.5	60.8	0.4	0
April	78.5	56.9	67.7	0.2	0
May	88.5	66.1	77.3	0.1	0
June	99.4	75.8	87.6	0	0
July	104.5	82	93.2	0.4	0
August	102.8	80.6	91.7	0.3	0
September	94.9	72.4	83.6	0.3	0
October	81.2	59.6	70.4	0.3	0
November	67.1	47.3	57.2	0.3	0
December	56.9	39.6	48.2	0.5	0.2

What to plant when in Las Vegas

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: December 13 · Transplant out: January 31
Peppers	warm	Start seeds indoors: November 29 · Transplant out: February 7
Cucumbers	warm	Direct sow: January 31
Zucchini / squash	warm	Direct sow: January 31
Bush beans	warm	Direct sow: January 31
Sweet corn	warm	Direct sow: January 31
Basil	warm	Transplant out: January 31
Peas	cool	Sow (spring): December 20 · Sow (fall): October 15
Spinach	cool	Sow (spring): December 13 · Sow (fall): October 15
Lettuce	cool	Sow (spring): December 27 · Sow (fall): October 15
Kale	cool	Transplant (spring): January 3 · Sow (fall): October 1
Broccoli	cool	Transplant (spring): January 10
Carrots	cool	Sow (spring): January 3 · Sow (fall): October 1
Onions	cool	Transplant (spring): December 27
Potatoes	cool	Plant seed potatoes: January 10
Radishes	cool	Sow (spring): December 27 · Sow (fall): October 29

Dates are computed from Las Vegas's average frost dates using standard cool-/warm-season timing. They're a starting point — a cold spring, a warm microclimate, or a fast-maturing variety can shift them by a week or two.

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Gear that helps you plant on time

Some links below are Amazon affiliate links (tag theboringthin-20). If you buy through them we may earn a small commission at no extra cost to you — it keeps this almanac free. We only list generic, genuinely-useful categories.

Soil thermometer →Know when the ground is warm enough to sow — the honest signal, not the calendar.Seed-starting trays + dome →Start tomatoes & peppers indoors on the schedule below.Seedling heat mat →Warms the soil for faster, more even germination indoors.Floating row cover / frost cloth →Buys you 4–8°F to beat an early or late frost.Raised garden bed kit →Warms and drains faster in spring than in-ground soil.Garden gloves →Basic kit for transplant day.

Nearby cities in Nevada

North Las Vegas, NV Henderson, NV Carson City, NV Sparks, NV Reno, NV

Sources & method. Hardiness zone: 2023 USDA Plant Hardiness Zone Map (PRISM Climate Group, Oregon State University). Frost dates & growing season: NOAA/NCEI 1991–2020 U.S. Climate Normals, nearest station with published freeze normals — Las Vegas Air Terminal, NV, 5 mi (confidence: high). Monthly weather normals: Las Vegas Mccarran Ap, NV, 6.1 mi (confidence: high). ZIP centroid from U.S. Census 2023 ZCTA data. Frost dates are the 50%-probability date — half of years frost occurs outside the stated date. Nothing here is invented; where the nearest station is far, we say so. Last updated 2026-07-22.