USDA Hardiness Zone 10a
Frost Dates for 92270 — Rancho Mirage, California
NOAA 1991–2020 normals from Palm Springs Regional Airport, CA (421 ft), 7 miles northwest.
Updated
Frost is not a yearly event in Rancho Mirage: a night at or below 32°F came in 11% of the winters of 1991–2020 at Palm Springs Regional Airport, CA, and a 36°F night, cold enough for frost on exposed leaves, in 61%. There is no reliable "last frost date" here; most years have none.
- Winters with a freeze
- 11%
- Winters with 36°F
- 61%
- Coldest month low
- 46°F
- Hardiness zone
- 10a
32°F or below, 1991–2020
frost possible on leaves
average, December
30 to 35°F (-1.1 to 1.7°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 20 observed
NOAA normal
Frost risk by date in Rancho Mirage
At Palm Springs Regional Airport, CA, 7 miles northwest of Rancho Mirage, 11% of the winters of 1991–2020 had at least one night at or below 32°F, 2% reached 28°F. Nights of 36°F, enough for frost on exposed leaves, are more common (61% of winters) and, when they come, fall between about December 29 and January 8. January is the month most likely to bring one: a 8% chance in a given year. 62 of the 283 other California stations behind this site's ZIP pages freeze in fewer than half of winters too.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F61% of yrs | Dec 15 | Dec 23 | Dec 31 | Jan 3 | Jan 8 | Jan 14 | Jan 22 | Feb 1 | Feb 13 |
| 32°F11% of yrs | too rare for a date | ||||||||
| 28°F2% of yrs | too rare for a date | ||||||||
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F61% of yrs | Dec 7 | Dec 13 | Dec 18 | Dec 25 | Dec 29 | Jan 1 | Jan 9 | Jan 16 | Jan 29 |
| 32°F11% of yrs | too rare for a date | ||||||||
| 28°F2% of yrs | too rare for a date | ||||||||
Freeze probabilities 1991–2020 at Palm Springs Regional Airport, CA, 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 92270 →Compare Rancho Mirage with another place →
Weather by month in Rancho Mirage
July is the warmest month at Palm Springs Regional Airport, CA, averaging 109°F by day and 79°F at night; December is the coldest at 69°F and 46°F. Every month stays under a 10% chance of a 32°F night; January is the likeliest at 8%.
Warmth for growing adds up to 9,384 growing degree days a year (base 50°F), more than at 99% of the 283 California stations. 42% of them (3,928) have built up by the end of June, and July adds the most, 1,364. Precipitation totals 4.5 inches a year, most in January (1.1") and least in May (0.0"); May to September bring 13% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 71 | 48 | 1.1 | 8% | <1 | 285 |
| Feb | 74 | 50 | 1.1 | 1% | <1 | 329 |
| Mar | 81 | 54 | 0.5 | 0% | 0 | 543 |
| Apr | 87 | 59 | 0.1 | 0% | 0 | 687 |
| May | 95 | 66 | 0.0 | 0% | 0 | 939 |
| Jun | 104 | 73 | 0.0 | 0% | 0 | 1144 |
| Jul | 109 | 79 | 0.3 | 0% | 0 | 1364 |
| Aug | 108 | 80 | 0.1 | 0% | 0 | 1362 |
| Sep | 102 | 74 | 0.2 | 0% | 0 | 1143 |
| Oct | 91 | 65 | 0.2 | 0% | 0 | 862 |
| Nov | 79 | 53 | 0.2 | 0% | 0 | 482 |
| Dec | 69 | 46 | 0.7 | 3% | 0 | 243 |
Monthly normals 1991–2020 at Palm Springs Regional Airport, CA (421 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, Palm Springs, CA, 7 miles northwest of Rancho Mirage, has a 32°F night in 21% of winters against 11% here, and a coolest-month low 1°F colder (45°F).
When it snows in Rancho Mirage, California
Measurable snow is rare here: only 0 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Palm Springs, CA, 6.7 miles away, so there is no typical first-snow date to plan around.
Where these figures come from
ZIP 92270 is 7 miles from Palm Springs Regional Airport, CA, which stands at 421 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 4 other ZIP codes share the station; its figures are presented in full for 92234 (Cathedral City). The 2023 USDA Plant Hardiness Zone Map lists ZIP 92270 in zone 10a, the band where the coldest night of the year averaged 30 to 35°F (-1.1 to 1.7°C) over 1991–2020; a zone describes winter lows, not frost dates.
Frost dates across California →
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.