Last spring frost
May 22
Frost Dates for Crescent Mills, CA
First fall frost
Sep 25
Growing season
122 days
Hardiness zone
7b
In an average year around Crescent Mills, CA, the last spring frost (32°F) is about May 22 and the first fall frost is about Sep 25, giving roughly a 122-day growing season. To be safe most years, wait until May 3 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%) |
|---|---|---|---|
| Freeze (32°F) | Jun 14 | May 22 | May 3 |
| Hard (28°F) | May 21 | Apr 29 | Apr 15 |
| Severe (24°F) | Apr 28 | Apr 12 | Mar 20 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 32°F | Jun 14 | Jun 7 | Jun 1 | May 27 | May 22 | May 18 | May 14 | May 8 | May 3 |
| 28°F | May 21 | May 12 | May 5 | May 1 | Apr 29 | Apr 26 | Apr 23 | Apr 20 | Apr 15 |
| 24°F | Apr 28 | Apr 22 | Apr 18 | Apr 15 | Apr 12 | Apr 7 | Apr 3 | Mar 29 | Mar 20 |
| 20°F | Apr 10 | Apr 1 | Mar 23 | Mar 15 | Mar 9 | Mar 4 | Feb 28 | Feb 22 | Feb 10 |
| 16°F | Mar 8 | Mar 1 | Feb 25 | Feb 19 | Feb 13 | Feb 4 | Jan 26 | Jan 12 | Dec 29 |
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%) |
|---|---|---|---|
| Freeze (32°F) | Sep 4 | Sep 25 | Oct 9 |
| Hard (28°F) | Sep 25 | Oct 9 | Oct 27 |
| Severe (24°F) | Oct 8 | Oct 29 | Nov 17 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 32°F | Sep 4 | Sep 11 | Sep 16 | Sep 20 | Sep 25 | Sep 28 | Oct 1 | Oct 4 | Oct 9 |
| 28°F | Sep 25 | Sep 30 | Oct 3 | Oct 6 | Oct 9 | Oct 13 | Oct 16 | Oct 21 | Oct 27 |
| 24°F | Oct 8 | Oct 15 | Oct 20 | Oct 24 | Oct 29 | Nov 1 | Nov 4 | Nov 10 | Nov 17 |
| 20°F | Oct 24 | Oct 31 | Nov 4 | Nov 9 | Nov 14 | Nov 19 | Nov 23 | Nov 28 | Dec 5 |
| 16°F | Nov 8 | Nov 16 | Nov 20 | Nov 25 | Dec 1 | Dec 5 | Dec 11 | Dec 19 | Jan 3 |
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: Quincy, Ca, about 8.8 miles away@if(!empty($station['elevation_ft'])), at 3,420 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 Crescent Mills, CA?
On average, the last spring frost (32°F) around Crescent Mills, CA is about May 22. In cooler years it can run later, so for a safer bet many gardeners wait until May 3.
When is the first frost in the fall?
The first fall frost around Crescent Mills, CA typically arrives about Sep 25. 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 May 22 on average, or May 3 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 122 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 95934 Planting calendar → California frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026