USDA Hardiness Zone 9b
Frost Dates for 89108 — Las Vegas, Nevada
NOAA 1991–2020 normals from Las Vegas Air Terminal, NV (2,203 ft), 2 miles east.
Updated
In Las Vegas, the last spring frost (32°F) is around January 24 in half of years and has passed by February 19 in nine years out of ten. The first fall frost comes around December 10, as early as November 24 one year in ten, leaving a typical freeze-free season of 323 days (NOAA, Las Vegas Air Terminal, NV).
- Last spring frost
- January 24
- First fall frost
- December 10
- Growing season
- 323 days
- Hardiness zone
- 9b
50% probability
50% probability
freeze-free, 50%
25 to 30°F (-3.9 to -1.1°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 0%
- Snow per year
- 0"
median, 1991–2020
median, 1991–2020
0 of 26 observed
NOAA normal
Frost risk by date in Las Vegas
Half of springs at Las Vegas Air Terminal, NV see their last 32°F night by January 24; only one in ten is past it by December 27, and one in ten still has one after February 19. Planting tender crops after February 4 leaves a 30% risk of a frost on them, after February 10 20%, and after February 19 10%. The 26 days between the even-odds date and the one-in-ten date is wider than at 87% of the 38 Nevada stations behind this site's ZIP pages, so a fixed calendar date is a gamble here.
In fall the first 32°F night comes by December 10 in half of years, as early as November 24 one year in ten, and holds off past December 29 one year in ten. A hard freeze of 28°F follows 15 days later, around December 25; in spring the one-in-ten date for 28°F is February 3, 16 days before the 32°F one. The freeze-free season lasts 323 days in a typical year, longer than at 92% of the 38 Nevada stations; it reaches 351 days one year in ten and falls short of 289 one year in ten. On average 11 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 23 days longer, to about February 16, and return around November 29. A 24°F night is unusual: 6% of winters had one.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Jan 23 | Feb 1 | Feb 6 | Feb 12 | Feb 16 | Feb 22 | Feb 27 | Mar 2 | Mar 9 |
| 32°F97% of yrs | Dec 27 | Jan 3 | Jan 11 | Jan 18 | Jan 24 | Jan 30 | Feb 4 | Feb 10 | Feb 19 |
| 28°F58% of yrs | Dec 10 | Dec 19 | Dec 26 | Dec 31 | Jan 2 | Jan 7 | Jan 13 | Jan 22 | Feb 3 |
| 24°F6% of yrs | too rare for a date | ||||||||
| 20°F0% of yrs | too rare for a date | ||||||||
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Nov 15 | Nov 19 | Nov 23 | Nov 26 | Nov 29 | Dec 1 | Dec 5 | Dec 9 | Dec 14 |
| 32°F97% of yrs | Nov 24 | Nov 30 | Dec 4 | Dec 7 | Dec 10 | Dec 14 | Dec 18 | Dec 22 | Dec 29 |
| 28°F58% of yrs | Dec 4 | Dec 11 | Dec 16 | Dec 20 | Dec 25 | Dec 30 | Jan 1 | Jan 8 | Jan 22 |
| 24°F6% of yrs | too rare for a date | ||||||||
| 20°F0% of yrs | too rare for a date | ||||||||
Freeze probabilities 1991–2020 at Las Vegas Air Terminal, NV, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.
Frost risk on any date in 89108 →Compare Las Vegas with another place →
Weather by month in Las Vegas
July is the warmest month at Las Vegas Air Terminal, NV, averaging 104°F by day and 80°F at night; December is the coldest at 56°F and 38°F. From March to October the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 34% of years.
Warmth for growing adds up to 7,167 growing degree days a year (base 50°F), more than at 87% of the 38 Nevada stations. 40% of them (2,846) have built up by the end of June, and July adds the most, 1,296. Precipitation totals 3.9 inches a year, most in February (0.8") and least in June (0.0"); May to September bring 15% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 58 | 39 | 0.7 | 72% | 3 | 49 |
| Feb | 62 | 43 | 0.8 | 34% | 2 | 113 |
| Mar | 71 | 49 | 0.5 | 2% | <1 | 301 |
| Apr | 78 | 55 | 0.2 | 0% | 0 | 494 |
| May | 88 | 64 | 0.1 | 0% | 0 | 806 |
| Jun | 99 | 74 | 0.0 | 0% | 0 | 1084 |
| Jul | 104 | 80 | 0.1 | 0% | 0 | 1296 |
| Aug | 102 | 78 | 0.2 | 0% | 0 | 1234 |
| Sep | 94 | 70 | 0.2 | 0% | 0 | 966 |
| Oct | 81 | 58 | 0.4 | 0% | 0 | 589 |
| Nov | 67 | 46 | 0.3 | 22% | 1 | 207 |
| Dec | 56 | 38 | 0.4 | 86% | 5 | 30 |
Monthly normals 1991–2020 at Las Vegas Air Terminal, NV (2,203 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.
Compared with the next station
The nearest other station, N Las Vegas, NV, 6 miles east of Las Vegas and 305 feet lower, has a last frost 8 days later (February 1), a first frost 2 days earlier (December 8), a season 12 days shorter.
When it snows in Las Vegas, Nevada
Measurable snow is rare here: only 0 of 26 winters from 1991 to 2020 recorded 0.1 inch or more at N Las Vegas, NV, 6.3 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 89108
| When | What to do |
|---|---|
| November 15 – November 29 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| November 29 – December 13 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| December 27 – January 10 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| January 24 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by September 17 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by November 26 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| December 10 onward | Plant garlic, mulch beds, lift tender bulbsGarlic wants a cold spell; bare soil loses structure over winter. |
The weeks before and after the 50% dates are general rules of thumb, not NOAA figures; a seed packet gives the timing for each variety.
Where these figures come from
ZIP 89108 is 2 miles from Las Vegas Air Terminal, NV, which stands at 2,203 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 16 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 89108 in zone 9b, the band where the coldest night of the year averaged 25 to 30°F (-3.9 to -1.1°C) over 1991–2020; a zone describes winter lows, not frost dates.
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.