Last spring frost
Jun 1
Frost Dates for Canby, CA
First fall frost
Sep 16
Growing season
106 days
Hardiness zone
7a
In an average year around Canby, CA, the last spring frost (32°F) is about Jun 1 and the first fall frost is about Sep 16, giving roughly a 106-day growing season. To be safe most years, wait until May 13 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) | Jul 3 | Jun 19 | Jun 1 |
| Freeze (32°F) | Jun 20 | Jun 1 | May 13 |
| Hard (28°F) | Jun 3 | May 12 | Apr 25 |
| Severe (24°F) | May 15 | Apr 25 | Apr 6 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Jul 3 | Jun 28 | Jun 25 | Jun 21 | Jun 19 | Jun 15 | Jun 12 | Jun 7 | Jun 1 |
| 32°F | Jun 20 | Jun 13 | Jun 9 | Jun 5 | Jun 1 | May 29 | May 23 | May 18 | May 13 |
| 28°F | Jun 3 | May 26 | May 20 | May 15 | May 12 | May 7 | May 4 | May 1 | Apr 25 |
| 24°F | May 15 | May 6 | May 1 | Apr 28 | Apr 25 | Apr 21 | Apr 16 | Apr 12 | Apr 6 |
| 20°F | Apr 24 | Apr 17 | Apr 11 | Apr 8 | Apr 3 | Mar 31 | Mar 27 | Mar 18 | Mar 10 |
| 16°F | Apr 6 | Mar 30 | Mar 21 | Mar 16 | Mar 10 | Mar 6 | Mar 1 | Feb 22 | Feb 12 |
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) | Aug 18 | Sep 3 | Sep 17 |
| Freeze (32°F) | Sep 1 | Sep 16 | Sep 29 |
| Hard (28°F) | Sep 13 | Sep 28 | Oct 11 |
| Severe (24°F) | Sep 28 | Oct 10 | Oct 25 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Aug 18 | Aug 25 | Aug 29 | Sep 1 | Sep 3 | Sep 6 | Sep 9 | Sep 12 | Sep 17 |
| 32°F | Sep 1 | Sep 6 | Sep 10 | Sep 13 | Sep 16 | Sep 18 | Sep 21 | Sep 24 | Sep 29 |
| 28°F | Sep 13 | Sep 19 | Sep 22 | Sep 25 | Sep 28 | Sep 30 | Oct 3 | Oct 6 | Oct 11 |
| 24°F | Sep 28 | Oct 1 | Oct 4 | Oct 7 | Oct 10 | Oct 14 | Oct 16 | Oct 20 | Oct 25 |
| 20°F | Oct 7 | Oct 12 | Oct 17 | Oct 20 | Oct 23 | Oct 27 | Oct 31 | Nov 3 | Nov 12 |
| 16°F | Oct 17 | Oct 24 | Oct 28 | Nov 1 | Nov 4 | Nov 10 | Nov 16 | Nov 21 | Nov 29 |
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: Canby 3 Sw, Ca, about 6.3 miles away@if(!empty($station['elevation_ft'])), at 4,310 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 Canby, CA?
On average, the last spring frost (32°F) around Canby, CA is about Jun 1. In cooler years it can run later, so for a safer bet many gardeners wait until May 13.
When is the first frost in the fall?
The first fall frost around Canby, CA typically arrives about Sep 16. 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 Jun 1 on average, or May 13 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 106 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 96015 Planting calendar → California frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026