Last spring frost
Mar 14
Frost Dates for Yucca Valley, CA
First fall frost
Nov 28
Growing season
255 days
Hardiness zone
9a
In an average year around Yucca Valley, CA, the last spring frost (32°F) is about Mar 14 and the first fall frost is about Nov 28, giving roughly a 255-day growing season. To be safe most years, wait until Feb 8 before setting out tender plants.
Last spring frost
Dates the last frost of spring typically ends. Plant tender crops after the risk has passed for your comfort level.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Apr 24 | Mar 31 | Mar 11 |
| Freeze (32°F) | Apr 1 | Mar 14 | Feb 8 |
| Hard (28°F) | Mar 19 | Feb 7 | Dec 26 |
| Severe (24°F) | Feb 13 | Jan 2 | Dec 11 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 24 | Apr 12 | Apr 7 | Apr 3 | Mar 31 | Mar 29 | Mar 24 | Mar 19 | Mar 11 |
| 32°F | Apr 1 | Mar 27 | Mar 22 | Mar 18 | Mar 14 | Mar 9 | Mar 2 | Feb 22 | Feb 8 |
| 28°F | Mar 19 | Mar 8 | Feb 28 | Feb 17 | Feb 7 | Jan 29 | Jan 15 | Jan 5 | Dec 26 |
| 24°F | Feb 13 | Jan 30 | Jan 18 | Jan 8 | Jan 2 | Dec 30 | Dec 25 | Dec 19 | Dec 11 |
| 20°F | Feb 9 | Jan 30 | Jan 15 | Jan 7 | Jan 5 | Jan 1 | Dec 28 | Dec 21 | Dec 14 |
First fall frost
Dates the first frost of fall typically arrives. Count back by a crop's days-to-maturity to know your planting cutoff.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Oct 25 | Nov 15 | Nov 30 |
| Freeze (32°F) | Nov 10 | Nov 28 | Dec 12 |
| Hard (28°F) | Nov 22 | Dec 8 | Dec 25 |
| Severe (24°F) | Dec 5 | Dec 21 | Jan 22 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 25 | Nov 1 | Nov 7 | Nov 11 | Nov 15 | Nov 18 | Nov 22 | Nov 25 | Nov 30 |
| 32°F | Nov 10 | Nov 16 | Nov 21 | Nov 24 | Nov 28 | Dec 1 | Dec 4 | Dec 7 | Dec 12 |
| 28°F | Nov 22 | Nov 29 | Dec 2 | Dec 6 | Dec 8 | Dec 12 | Dec 16 | Dec 20 | Dec 25 |
| 24°F | Dec 5 | Dec 9 | Dec 13 | Dec 17 | Dec 21 | Dec 25 | Dec 28 | Jan 2 | Jan 22 |
| 20°F | Dec 13 | Dec 19 | Dec 28 | Dec 31 | Jan 3 | Jan 6 | Jan 14 | Jan 25 | Feb 8 |
Growing season is measured at 32°F with about 50% probability. Hardiness zone from the 2023 USDA map; frost normals from NOAA 1991-2020.
Where this data comes from
@endif These dates are computed from the nearest official weather station with long-term records: Yucca Valley, Ca, about 3 miles away@if(!empty($station['elevation_ft'])), at 3,249 ft elevation. The further the station and the greater the elevation difference from your yard, the more your local frost timing can vary.
How we calculate these dates
Frost and freeze dates come from the NOAA 1991–2020 U.S. Climate Normals, the National Oceanic and Atmospheric Administration's 30-year averages for each weather station. A date shown at the 50% level is the median: in half of years the frost falls on or before it. The 10% and 90% columns show the early and late ends of the range, so you can plant on the odds you're comfortable with. These are long-term averages, not a forecast for this year - always check your local outlook before planting.
Source: NOAA National Centers for Environmental Information, 1991–2020 Climate Normals (public domain). Harman is not affiliated with or endorsed by NOAA.
Frequently asked questions
When is the last frost in Yucca Valley, CA?
On average, the last spring frost (32°F) around Yucca Valley, CA is about Mar 14. In cooler years it can run later, so for a safer bet many gardeners wait until Feb 8.
When is the first frost in the fall?
The first fall frost around Yucca Valley, CA typically arrives about Nov 28. Count back by a crop's days to maturity to find the latest date you can plant it.
When can I plant tomatoes and other tender crops?
Tender crops like tomatoes, peppers and basil are damaged by frost, so wait until the last spring frost has passed - around Mar 14 on average, or Feb 8 to be safe most years.
How long is the growing season here?
The frost-free growing season (between the last spring and first fall 32°F frost) is about 255 days in a typical year.
Are these dates a forecast for this year?
No. They are 30-year averages from the NOAA 1991–2020 Climate Normals, not a prediction for the current year. Use them for planning and always check your local weather forecast before planting or protecting crops.
Local weather for 92284 Planting calendar → California frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026