Last spring frost
Apr 27
Frost Dates for Coffee Creek, CA
First fall frost
Oct 21
Growing season
176 days
Hardiness zone
8b
In an average year around Coffee Creek, CA, the last spring frost (32°F) is about Apr 27 and the first fall frost is about Oct 21, giving roughly a 176-day growing season. To be safe most years, wait until Apr 9 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) | Jun 11 | May 18 | Apr 30 |
| Freeze (32°F) | May 17 | Apr 27 | Apr 9 |
| Hard (28°F) | Apr 23 | Apr 2 | Mar 8 |
| Severe (24°F) | Apr 1 | Feb 23 | Jan 13 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Jun 11 | Jun 4 | May 31 | May 23 | May 18 | May 13 | May 8 | May 4 | Apr 30 |
| 32°F | May 17 | May 8 | May 4 | Apr 30 | Apr 27 | Apr 23 | Apr 20 | Apr 15 | Apr 9 |
| 28°F | Apr 23 | Apr 17 | Apr 11 | Apr 7 | Apr 2 | Mar 28 | Mar 22 | Mar 16 | Mar 8 |
| 24°F | Apr 1 | Mar 17 | Mar 6 | Feb 28 | Feb 23 | Feb 16 | Feb 7 | Jan 30 | Jan 13 |
| 20°F | Feb 19 | Feb 9 | Jan 31 | Jan 21 | Jan 12 | Jan 6 | Dec 31 | Dec 25 | Dec 13 |
| 16°F | Jan 26 | Jan 15 | Jan 7 | Jan 3 | Dec 30 | Dec 27 | Dec 21 | Dec 13 | Dec 7 |
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) | Sep 21 | Oct 5 | Oct 20 |
| Freeze (32°F) | Oct 7 | Oct 21 | Nov 7 |
| Hard (28°F) | Oct 20 | Nov 6 | Dec 1 |
| Severe (24°F) | Nov 3 | Nov 28 | Dec 28 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 21 | Sep 26 | Sep 30 | Oct 2 | Oct 5 | Oct 7 | Oct 11 | Oct 15 | Oct 20 |
| 32°F | Oct 7 | Oct 11 | Oct 14 | Oct 17 | Oct 21 | Oct 24 | Oct 28 | Nov 1 | Nov 7 |
| 28°F | Oct 20 | Oct 26 | Oct 30 | Nov 2 | Nov 6 | Nov 11 | Nov 18 | Nov 23 | Dec 1 |
| 24°F | Nov 3 | Nov 11 | Nov 18 | Nov 23 | Nov 28 | Dec 3 | Dec 9 | Dec 16 | Dec 28 |
| 20°F | Nov 20 | Dec 1 | Dec 6 | Dec 12 | Dec 17 | Dec 23 | Dec 30 | Jan 7 | Jan 23 |
| 16°F | Dec 2 | Dec 8 | Dec 12 | Dec 18 | Dec 24 | Dec 28 | 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: Cecilville, Ca, about 3.9 miles away@if(!empty($station['elevation_ft'])), at 2,310 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 Coffee Creek, CA?
On average, the last spring frost (32°F) around Coffee Creek, CA is about Apr 27. In cooler years it can run later, so for a safer bet many gardeners wait until Apr 9.
When is the first frost in the fall?
The first fall frost around Coffee Creek, CA typically arrives about Oct 21. 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 Apr 27 on average, or Apr 9 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 176 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 96031 Planting calendar → California frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026