Last spring frost
Apr 2
Frost Dates for Cannon Beach, OR
First fall frost
Nov 12
Growing season
223 days
Hardiness zone
9a
In an average year around Cannon Beach, OR, the last spring frost (32°F) is about Apr 2 and the first fall frost is about Nov 12, giving roughly a 223-day growing season. To be safe most years, wait until Mar 4 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 16 | Apr 29 | Apr 5 |
| Freeze (32°F) | Apr 29 | Apr 2 | Mar 4 |
| Hard (28°F) | Mar 31 | Feb 27 | Dec 31 |
| Severe (24°F) | Mar 1 | Jan 14 | Dec 2 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 16 | May 11 | May 6 | May 2 | Apr 29 | Apr 26 | Apr 21 | Apr 15 | Apr 5 |
| 32°F | Apr 29 | Apr 20 | Apr 11 | Apr 6 | Apr 2 | Mar 29 | Mar 23 | Mar 16 | Mar 4 |
| 28°F | Mar 31 | Mar 21 | Mar 12 | Mar 5 | Feb 27 | Feb 21 | Feb 12 | Jan 29 | Dec 31 |
| 24°F | Mar 1 | Feb 23 | Feb 11 | Jan 30 | Jan 14 | Dec 31 | Dec 18 | Dec 9 | Dec 2 |
| 20°F | Feb 22 | Feb 1 | Jan 8 | Dec 31 | Dec 23 | Dec 16 | Dec 12 | Dec 7 | Dec 1 |
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 30 | Oct 20 | Nov 12 |
| Freeze (32°F) | Oct 18 | Nov 12 | Dec 6 |
| Hard (28°F) | Nov 7 | Dec 4 | Feb 1 |
| Severe (24°F) | Nov 25 | Dec 17 | Feb 20 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 30 | Oct 5 | Oct 10 | Oct 16 | Oct 20 | Oct 23 | Oct 28 | Nov 1 | Nov 12 |
| 32°F | Oct 18 | Oct 26 | Nov 1 | Nov 5 | Nov 12 | Nov 18 | Nov 24 | Nov 30 | Dec 6 |
| 28°F | Nov 7 | Nov 17 | Nov 25 | Nov 30 | Dec 4 | Dec 10 | Dec 19 | Jan 3 | Feb 1 |
| 24°F | Nov 25 | Dec 1 | Dec 6 | Dec 11 | Dec 17 | Dec 29 | Jan 10 | Jan 31 | Feb 20 |
| 20°F | Nov 30 | Dec 5 | Dec 10 | Dec 13 | Dec 19 | Dec 23 | Jan 4 | Jan 31 | Feb 22 |
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: Seaside, Or, about 10 miles away@if(!empty($station['elevation_ft'])), at 10 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 Cannon Beach, OR?
On average, the last spring frost (32°F) around Cannon Beach, OR is about Apr 2. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 4.
When is the first frost in the fall?
The first fall frost around Cannon Beach, OR typically arrives about Nov 12. 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 2 on average, or Mar 4 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 223 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 97145 Planting calendar → Oregon frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026