Last spring frost
Mar 11
Frost Dates for Fort Dick, CA
First fall frost
Nov 23
Growing season
256 days
Hardiness zone
9b
In an average year around Fort Dick, CA, the last spring frost (32°F) is about Mar 11 and the first fall frost is about Nov 23, giving roughly a 256-day growing season. To be safe most years, wait until Jan 31 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 23 | Mar 27 |
| Freeze (32°F) | Apr 12 | Mar 11 | Jan 31 |
| Hard (28°F) | Mar 7 | Jan 17 | Dec 8 |
| Severe (24°F) | Jan 22 | Dec 30 | Dec 6 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 19 | May 9 | May 3 | Apr 29 | Apr 23 | Apr 17 | Apr 11 | Apr 3 | Mar 27 |
| 32°F | Apr 12 | Mar 31 | Mar 25 | Mar 18 | Mar 11 | Mar 3 | Feb 25 | Feb 16 | Jan 31 |
| 28°F | Mar 7 | Feb 24 | Feb 7 | Jan 29 | Jan 17 | Jan 7 | Dec 31 | Dec 20 | Dec 8 |
| 24°F | Jan 22 | Jan 13 | Jan 6 | Jan 1 | Dec 30 | Dec 22 | Dec 17 | Dec 12 | Dec 6 |
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 10 | Nov 1 | Nov 20 |
| Freeze (32°F) | Nov 1 | Nov 23 | Dec 25 |
| Hard (28°F) | Nov 18 | Dec 17 | Feb 15 |
| Severe (24°F) | Dec 1 | Dec 23 | Jan 20 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 10 | Oct 18 | Oct 24 | Oct 29 | Nov 1 | Nov 4 | Nov 9 | Nov 13 | Nov 20 |
| 32°F | Nov 1 | Nov 8 | Nov 14 | Nov 18 | Nov 23 | Nov 28 | Dec 2 | Dec 11 | Dec 25 |
| 28°F | Nov 18 | Nov 30 | Dec 3 | Dec 10 | Dec 17 | Dec 26 | Jan 3 | Jan 16 | Feb 15 |
| 24°F | Dec 1 | Dec 9 | Dec 12 | Dec 18 | Dec 23 | Dec 29 | Jan 1 | Jan 9 | Jan 20 |
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: Crescent City 3 Nnw, Ca, about 6.3 miles away@if(!empty($station['elevation_ft'])), at 43 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 Fort Dick, CA?
On average, the last spring frost (32°F) around Fort Dick, CA is about Mar 11. In cooler years it can run later, so for a safer bet many gardeners wait until Jan 31.
When is the first frost in the fall?
The first fall frost around Fort Dick, CA typically arrives about Nov 23. 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 11 on average, or Jan 31 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 256 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 95531 Planting calendar → California frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026