Frost dates for Las Vegas
The typical last spring frost in Las Vegas is Jan 20, and the typical first fall frost is Dec 15. These dates come from Las Vegas Harry Reid International Airport, and the growing season between them is 333 days.
NCEI U.S. Climate Normals 1991-2020, annual/seasonal (c20230404), USW00023169
This season's measured frost
No freeze has been recorded yet this fall at Las Vegas Harry Reid International Airport; the lowest reading since July 1 is 62F on Sep 28, against a typical first frost date of Dec 15.
No freeze was recorded at Las Vegas Harry Reid International Airport in the first half of 2026.
Readings come from official daily lows in the daily climate report of the National Weather Service, via the Iowa Environmental Mesonet.
Early, typical and late years for Las Vegas
| Year type | Last spring frost | First fall frost |
|---|---|---|
| Early year (1 in 10) | Dec 20 | Nov 28 |
| Typical year | Jan 20 | Dec 15 |
| Late year (1 in 10) | Feb 14 | Jan 7 |
For spring, an early year means 1 year in 10 has a last freeze before the early date, and a late year means 1 year in 10 has a last freeze after the late date. For fall, an early year means 1 year in 10 has a first freeze by the early date, and a late year means it holds off past the late date.
The growing season in a typical year is 333 days, with the shortest at 299 days and the longest at 360 days in 1 year in 10.
Frost and freeze thresholds
| Last spring frost | First fall frost | |
|---|---|---|
| Light frost (36F) | Feb 11 | Dec 3 |
| Freeze (32F) | Jan 20 | Dec 15 |
| Hard freeze (28F) | Dec 31 | Dec 26 |
Clear, calm nights can see frost on plants at a low of 36F. A low of 32F is a freeze, and most tender plants are killed at 28F, a hard freeze.
More weather for Las Vegas
A typical date is the median: half of years have an earlier last spring frost, half a later one. An early year means 1 year in 10, and a late year means 1 year in 10. Dates come from the U.S. Climate Normals for 1991-2020, published by NOAA's National Centers for Environmental Information, using a daily low of 32F or below as a freeze.
The daily climate report is issued by the local National Weather Service forecast office and delivered to this page by the Iowa Environmental Mesonet of Iowa State University. Under 17 U.S.C. 105, no copyright attaches to the government-produced figures on this page, including reports, alerts, station observations, and normals, which were created by the National Weather Service and other NOAA offices. The notice that 17 U.S.C. 403 requires appears in this sentence. It does not imply endorsement by or affiliation with those agencies. See: Data sources and attribution.