Last spring frost
Mar 25
Frost Dates for Brookdale, CA
First fall frost
Nov 11
Growing season
231 days
Hardiness zone
9b
In an average year around Brookdale, CA, the last spring frost (32°F) is about Mar 25 and the first fall frost is about Nov 11, giving roughly a 231-day growing season. To be safe most years, wait until Feb 17 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) | May 19 | Apr 28 | Apr 6 |
| Freeze (32°F) | Apr 21 | Mar 25 | Feb 17 |
| Hard (28°F) | Mar 9 | Feb 6 | Dec 26 |
| Severe (24°F) | Feb 13 | Jan 4 | Dec 13 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 19 | May 11 | May 5 | Apr 30 | Apr 28 | Apr 23 | Apr 18 | Apr 13 | Apr 6 |
| 32°F | Apr 21 | Apr 12 | Apr 4 | Mar 31 | Mar 25 | Mar 17 | Mar 10 | Feb 28 | Feb 17 |
| 28°F | Mar 9 | Feb 28 | Feb 22 | Feb 15 | Feb 6 | Jan 30 | Jan 22 | Jan 8 | Dec 26 |
| 24°F | Feb 13 | Jan 31 | Jan 21 | Jan 13 | Jan 4 | Dec 31 | Dec 27 | Dec 20 | Dec 13 |
| 20°F | Jan 14 | Jan 4 | Jan 2 | Dec 31 | Dec 30 | Dec 25 | Dec 20 | Dec 14 | Dec 8 |
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 1 | Oct 21 | Nov 11 |
| Freeze (32°F) | Oct 18 | Nov 11 | Dec 4 |
| Hard (28°F) | Nov 11 | Dec 4 | Jan 7 |
| Severe (24°F) | Dec 1 | Dec 20 | Jan 23 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 1 | Oct 6 | Oct 12 | Oct 17 | Oct 21 | Oct 26 | Nov 1 | Nov 5 | Nov 11 |
| 32°F | Oct 18 | Oct 26 | Nov 1 | Nov 6 | Nov 11 | Nov 16 | Nov 21 | Nov 27 | Dec 4 |
| 28°F | Nov 11 | Nov 19 | Nov 25 | Nov 30 | Dec 4 | Dec 8 | Dec 15 | Dec 25 | Jan 7 |
| 24°F | Dec 1 | Dec 6 | Dec 11 | Dec 16 | Dec 20 | Dec 27 | Jan 1 | Jan 10 | Jan 23 |
| 20°F | Dec 6 | Dec 11 | Dec 18 | Dec 22 | Dec 27 | Dec 31 | Jan 1 | Jan 3 | Jan 11 |
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: Ben Lomond #4, Ca, about 2.6 miles away@if(!empty($station['elevation_ft'])), at 420 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 Brookdale, CA?
On average, the last spring frost (32°F) around Brookdale, CA is about Mar 25. In cooler years it can run later, so for a safer bet many gardeners wait until Feb 17.
When is the first frost in the fall?
The first fall frost around Brookdale, CA typically arrives about Nov 11. 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 25 on average, or Feb 17 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 231 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 95007 Planting calendar → California frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026