Las Vegas, NV Frost Dates
Published: February 1, 2026 · Updated: April 23, 2026
USDA Zone 9a
Last Spring Frost
January 30
Safe to transplant after this date
First Fall Frost
December 15
Protect tender plants before this date
Frost-Free Season
319 days
Year-round to Year-round
244 days until last frost in Las Vegas — January 30
Las Vegas’s zone 9a climate means frost is a minor consideration. Nearly year-round growing season. Frost possible but rare. Phoenix, Los Angeles, Central Florida. Rather than a single planting season, Las Vegas gardeners work almost year-round.
Complete Planting Calendar for Las Vegas
Lawn Care Timing for Las Vegas
Based on Las Vegas's USDA zone 9a frost dates: The last frost of January 30 marks when warm-season grasses begin recovering. Apply spring fertilizer in February when soil reaches 55°F. The first fall frost of December 15 sets your deadlines — complete overseeding by October–November and apply winterizer by Not typically needed.
USDA Zone 9a Summary
Nearly year-round growing season. Frost possible but rare. Phoenix, Los Angeles, Central Florida.
Frequently Asked Questions
What is the last frost date in Las Vegas, NV?
The average last spring frost in Las Vegas is January 30. This is based on USDA zone 9a historical averages. Plan transplanting and spring lawn care around this date — wait 2 weeks after for frost-sensitive plantings.
When is the first fall frost in Las Vegas?
Las Vegas’s average first fall frost is December 15. This sets deadlines for fall overseeding (must be done when temperatures cool) and winterizer application (by Not typically needed).
When should I plant tomatoes in Las Vegas?
Transplant tomato seedlings outdoors after January 30. Start seeds indoors September (for fall garden). Direct sow warm-season crops february–april.
When should I overseed my lawn in Las Vegas?
The prime overseeding window in Las Vegas is October–November. This ensures warm soil for germination before the first fall frost on December 15.
When should I apply winterizer in Las Vegas?
Apply winterizer fertilizer in Las Vegas by Not typically needed. This high-potassium application hardens grass cell walls before freeze damage. Your first fall frost of December 15 is the hard deadline.