Last spring frost
Mar 16
Frost Dates for Fairview, OR
First fall frost
Nov 20
Growing season
250 days
Hardiness zone
9a
In an average year around Fairview, OR, the last spring frost (32°F) is about Mar 16 and the first fall frost is about Nov 20, giving roughly a 250-day growing season. To be safe most years, wait until Feb 18 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 4 | Apr 19 | Mar 27 |
| Freeze (32°F) | Apr 12 | Mar 16 | Feb 18 |
| Hard (28°F) | Mar 10 | Feb 14 | Dec 27 |
| Severe (24°F) | Feb 20 | Jan 22 | Dec 6 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 4 | May 1 | Apr 28 | Apr 24 | Apr 19 | Apr 14 | Apr 9 | Apr 2 | Mar 27 |
| 32°F | Apr 12 | Apr 2 | Mar 27 | Mar 21 | Mar 16 | Mar 10 | Mar 3 | Feb 26 | Feb 18 |
| 28°F | Mar 10 | Mar 1 | Feb 25 | Feb 19 | Feb 14 | Feb 6 | Jan 31 | Jan 15 | Dec 27 |
| 24°F | Feb 20 | Feb 12 | Feb 4 | Jan 31 | Jan 22 | Jan 9 | Dec 31 | Dec 20 | Dec 6 |
| 20°F | Feb 18 | Feb 5 | Jan 31 | Jan 20 | Jan 10 | Dec 30 | Dec 19 | Dec 12 | Dec 5 |
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 11 | Oct 30 | Nov 22 |
| Freeze (32°F) | Oct 30 | Nov 20 | Dec 17 |
| Hard (28°F) | Nov 15 | Dec 15 | Feb 3 |
| Severe (24°F) | Nov 30 | Jan 1 | Feb 13 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 11 | Oct 18 | Oct 22 | Oct 27 | Oct 30 | Nov 3 | Nov 8 | Nov 14 | Nov 22 |
| 32°F | Oct 30 | Nov 4 | Nov 9 | Nov 15 | Nov 20 | Nov 26 | Dec 1 | Dec 7 | Dec 17 |
| 28°F | Nov 15 | Nov 25 | Dec 2 | Dec 7 | Dec 15 | Dec 25 | Jan 1 | Jan 16 | Feb 3 |
| 24°F | Nov 30 | Dec 6 | Dec 14 | Dec 22 | Jan 1 | Jan 11 | Jan 25 | Feb 1 | Feb 13 |
| 20°F | Dec 2 | Dec 10 | Dec 16 | Dec 22 | Jan 1 | Jan 15 | Jan 27 | Feb 2 | Feb 17 |
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: Portland Troutdale Ap, Or, about 1.6 miles away@if(!empty($station['elevation_ft'])), at 29 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 Fairview, OR?
On average, the last spring frost (32°F) around Fairview, OR is about Mar 16. In cooler years it can run later, so for a safer bet many gardeners wait until Feb 18.
When is the first frost in the fall?
The first fall frost around Fairview, OR typically arrives about Nov 20. 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 16 on average, or Feb 18 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 250 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 97024 Planting calendar → Oregon frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026