Last spring frost
Feb 19
Frost Dates for Hidden Meadows, CA
First fall frost
Dec 1
Growing season
281 days
Hardiness zone
10a
In an average year around Hidden Meadows, CA, the last spring frost (32°F) is about Feb 19 and the first fall frost is about Dec 1, giving roughly a 281-day growing season. To be safe most years, wait until Jan 10 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 22 | Apr 2 | Mar 1 |
| Freeze (32°F) | Mar 31 | Feb 19 | Jan 10 |
| Hard (28°F) | Feb 14 | Jan 8 | Dec 13 |
| Severe (24°F) | Jan 28 | Dec 30 | Dec 10 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 22 | Apr 16 | Apr 11 | Apr 6 | Apr 2 | Mar 27 | Mar 19 | Mar 12 | Mar 1 |
| 32°F | Mar 31 | Mar 16 | Mar 4 | Feb 26 | Feb 19 | Feb 12 | Feb 4 | Jan 25 | Jan 10 |
| 28°F | Feb 14 | Feb 3 | Jan 25 | Jan 16 | Jan 8 | Jan 2 | Dec 30 | Dec 22 | Dec 13 |
| 24°F | Jan 28 | Jan 15 | Jan 7 | Jan 1 | Dec 30 | Dec 26 | Dec 22 | Dec 16 | Dec 10 |
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 22 | Nov 13 | Dec 1 |
| Freeze (32°F) | Nov 11 | Dec 1 | Dec 20 |
| Hard (28°F) | Nov 28 | Dec 17 | Jan 12 |
| Severe (24°F) | Dec 9 | Dec 26 | Jan 21 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 22 | Oct 31 | Nov 5 | Nov 10 | Nov 13 | Nov 16 | Nov 20 | Nov 24 | Dec 1 |
| 32°F | Nov 11 | Nov 18 | Nov 23 | Nov 27 | Dec 1 | Dec 4 | Dec 8 | Dec 13 | Dec 20 |
| 28°F | Nov 28 | Dec 4 | Dec 9 | Dec 13 | Dec 17 | Dec 21 | Dec 27 | Dec 31 | Jan 12 |
| 24°F | Dec 9 | Dec 13 | Dec 20 | Dec 23 | Dec 26 | Dec 30 | Jan 2 | Jan 7 | Jan 21 |
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: Valley Ctr 1N, Ca, about 5.1 miles away@if(!empty($station['elevation_ft'])), at 1,290 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 Hidden Meadows, CA?
On average, the last spring frost (32°F) around Hidden Meadows, CA is about Feb 19. In cooler years it can run later, so for a safer bet many gardeners wait until Jan 10.
When is the first frost in the fall?
The first fall frost around Hidden Meadows, CA typically arrives about Dec 1. 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 Feb 19 on average, or Jan 10 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 281 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 92026 Planting calendar → California frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026