Frost dates for Las Vegas Air Terminal, Nevada
Half of years have their last spring frost by January 24, but 1 year in 10 still frosts after February 19.
A frost date is really a percentile from 30 years of records at a nearby weather station: in about half of years a frost still comes after the median date. Both numbers are below, so you can choose the risk yourself.
The odds
Last spring frost
How often a frost still comes on or after each date.
- 1 year in 10
- February 19
- 1 year in 5
- February 10
- 3 years in 10
- February 4
- 2 years in 5
- January 30
- Half of years (the median)
- January 24
First fall freeze
How often the first freeze comes on or before each date.
- 1 year in 10
- November 24
- 1 year in 5
- November 30
- 3 years in 10
- December 4
- 2 years in 5
- December 7
- Half of years (the median)
- December 10
- Growing season
- about 323 days
- Hardiness zones nearby
- 9a, 9b
- Summer days
- a usual high of about 39 °C101 °F
- Lettuce and spinach run to seed
- April to September, in hot, long days (how we know)
Summer and rain
A growing garden needs about 25 mm1 in of water a week, rain and watering together. Here is what a normal month brings.
- Hot-weather watering
- June to September: days run above 32 °C90 °F and nights stay above 21 °C70 °F, so expect to water daily or every other day (how we know)
- Nearly every drop is yours
- All year: rain brings less than a quarter of the water a growing garden needs, about 25 mm1 in a week (how we know)
Month by month
- January
- high ~14 °C58 °F · low ~4 °C39 °F · rain ~17 mm0.7 in
- February
- high ~17 °C62 °F · low ~6 °C43 °F · rain ~21 mm0.8 in
- March
- high ~21 °C71 °F · low ~9 °C49 °F · rain ~13 mm0.5 in
- April
- high ~26 °C78 °F · low ~13 °C55 °F · rain ~5.8 mm0.2 in
- May
- high ~31 °C88 °F · low ~18 °C64 °F · rain ~2 mm0.08 in
- June
- high ~37 °C99 °F · low ~23 °C74 °F · rain ~0.3 mm0.01 in
- July
- high ~40 °C104 °F · low ~27 °C80 °F · rain ~3.3 mm0.1 in
- August
- high ~39 °C102 °F · low ~25 °C78 °F · rain ~5.6 mm0.2 in
- September
- high ~35 °C94 °F · low ~21 °C70 °F · rain ~6.1 mm0.2 in
- October
- high ~27 °C80 °F · low ~14 °C58 °F · rain ~8.9 mm0.4 in
- November
- high ~19 °C67 °F · low ~8 °C46 °F · rain ~7.4 mm0.3 in
- December
- high ~14 °C56 °F · low ~3 °C38 °F · rain ~11 mm0.4 in
Where these numbers come from
NOAA NCEI 1991–2020 Climate Normals, the Las Vegas Air Terminal station (listed by NOAA as Las Vegas Air Terminal, USW00053123), at 36.21, -115.20. These are that station’s own records, unshifted. The further your garden is from it, the less exactly they describe your ground. The planner finds the nearest station to your garden and lowers its confidence with distance, so no number is presented as if it were measured in your garden.
Cold air also pools in low ground on the clear, still nights when frost happens, so a hollow can freeze while a slope a few hundred feet away does not. No table can know that about your garden. A few seasons of your own logged frosts can.
ZIP codes nearest this station
89030, 89031, 89032, 89081, 89084, 89085, 89086, 89101, 89102, 89106, 89107, 89108…
+13 moreShow fewer
89110, 89115, 89117, 89128, 89129, 89130, 89131, 89134, 89144, 89145, 89146, 89149, 89191.
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