USDA Hardiness Zone 9b
Frost Dates for 89040 — Overton, Nevada
NOAA 1991–2020 normals from Overton, NV (1,250 ft), under a mile north.
Updated
In Overton, the last spring frost (32°F) is around February 26 in half of years and has passed by March 16 in nine years out of ten. The first fall frost comes around November 22, as early as November 9 one year in ten, leaving a typical freeze-free season of 268 days (NOAA, Overton, NV).
- Last spring frost
- February 26
- First fall frost
- November 22
- Growing season
- 268 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 28 observed
NOAA normal
Frost risk by date in Overton
Half of springs at Overton, NV see their last 32°F night by February 26; only one in ten is past it by February 4, and one in ten still has one after March 16. Planting tender crops after March 3 leaves a 30% risk of a frost on them, after March 8 20%, and after March 16 10%. The 18 days between the even-odds date and the one-in-ten date is narrower than at 74% of the 38 Nevada stations behind this site's ZIP pages.
In fall the first 32°F night comes by November 22 in half of years, as early as November 9 one year in ten, and holds off past December 6 one year in ten. A hard freeze of 28°F follows 10 days later, around December 2; in spring the one-in-ten date for 28°F is February 28, 16 days before the 32°F one. The freeze-free season lasts 268 days in a typical year, longer than at 84% of the 38 Nevada stations; it reaches 292 days one year in ten and falls short of 242 one year in ten. On average 42 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 17 days longer, to about March 15, and return around November 12. Nights of 24°F, cold enough to damage hardier plants, come in 88% of winters and 16°F in 9%.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Feb 26 | Mar 3 | Mar 7 | Mar 11 | Mar 15 | Mar 21 | Mar 30 | Apr 4 | Apr 11 |
| 32°F | Feb 4 | Feb 10 | Feb 17 | Feb 21 | Feb 26 | Feb 28 | Mar 3 | Mar 8 | Mar 16 |
| 28°F | Jan 11 | Jan 20 | Jan 27 | Feb 1 | Feb 5 | Feb 10 | Feb 16 | Feb 21 | Feb 28 |
| 24°F88% of yrs | Dec 22 | Dec 29 | Jan 3 | Jan 9 | Jan 15 | Jan 21 | Jan 27 | Feb 1 | Feb 10 |
| 20°F41% of yrs | too rare for a date | ||||||||
| 16°F9% of yrs | too rare for a date | ||||||||
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 31 | Nov 4 | Nov 7 | Nov 9 | Nov 12 | Nov 14 | Nov 16 | Nov 20 | Nov 24 |
| 32°F | Nov 9 | Nov 13 | Nov 16 | Nov 19 | Nov 22 | Nov 24 | Nov 27 | Dec 1 | Dec 6 |
| 28°F | Nov 18 | Nov 23 | Nov 26 | Nov 30 | Dec 2 | Dec 6 | Dec 9 | Dec 15 | Dec 23 |
| 24°F88% of yrs | Nov 28 | Dec 3 | Dec 6 | Dec 11 | Dec 16 | Dec 21 | Dec 26 | Jan 1 | Jan 9 |
| 20°F41% of yrs | too rare for a date | ||||||||
| 16°F9% of yrs | too rare for a date | ||||||||
Freeze probabilities 1991–2020 at Overton, 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 89040 →Compare Overton with another place →
Weather by month in Overton
July is the warmest month at Overton, NV, averaging 109°F by day and 75°F at night; December is the coldest at 61°F and 32°F. A freezing night is all but certain in every month from December to January (a 90% chance or more). From April to October the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 90% of years and March still brings one in 37% of years.
Warmth for growing adds up to 7,159 growing degree days a year (base 50°F), more than at 84% of the 38 Nevada stations. 39% of them (2,826) have built up by the end of June, and July adds the most, 1,303. Precipitation totals 5.6 inches a year, most in February (0.9") and least in May (0.1"); May to September bring 23% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 62 | 33 | 0.7 | 100% | 14 | 33 |
| Feb | 67 | 38 | 0.9 | 90% | 6 | 101 |
| Mar | 75 | 44 | 0.8 | 37% | 1 | 304 |
| Apr | 83 | 50 | 0.3 | 3% | 0 | 500 |
| May | 93 | 59 | 0.1 | 0% | 0 | 812 |
| Jun | 104 | 68 | 0.1 | 0% | 0 | 1076 |
| Jul | 109 | 75 | 0.4 | 0% | 0 | 1303 |
| Aug | 107 | 73 | 0.4 | 0% | 0 | 1251 |
| Sep | 100 | 65 | 0.3 | 0% | 0 | 976 |
| Oct | 86 | 52 | 0.5 | 2% | <1 | 591 |
| Nov | 71 | 40 | 0.5 | 77% | 4 | 189 |
| Dec | 61 | 32 | 0.6 | 100% | 17 | 23 |
Monthly normals 1991–2020 at Overton, NV (1,250 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, Bunkerville, NV, 25 miles northeast of Overton and 350 feet higher, has a last frost 18 days later (March 16), a first frost 9 days earlier (November 13), a season 30 days shorter.
When it snows in Overton, Nevada
Measurable snow is rare here: only 0 of 28 winters from 1991 to 2020 recorded 0.1 inch or more at Overton, NV, 0.7 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 89040
| When | What to do |
|---|---|
| December 18 – January 1 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| January 1 – January 15 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| January 29 – February 12 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| February 26 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 30 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by November 8 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 22 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 89040 is under a mile from Overton, NV, which stands at 1,250 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 89040 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.