Last spring frost
Apr 22
Frost Dates for Wheeler, OR
First fall frost
Oct 21
Growing season
183 days
Hardiness zone
9a
In an average year around Wheeler, OR, the last spring frost (32°F) is about Apr 22 and the first fall frost is about Oct 21, giving roughly a 183-day growing season. To be safe most years, wait until Mar 28 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 5 | May 15 | Apr 26 |
| Freeze (32°F) | May 13 | Apr 22 | Mar 28 |
| Hard (28°F) | Apr 20 | Mar 22 | Feb 22 |
| Severe (24°F) | Mar 15 | Feb 10 | Dec 17 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Jun 5 | May 31 | May 27 | May 21 | May 15 | May 10 | May 6 | Apr 30 | Apr 26 |
| 32°F | May 13 | May 6 | May 2 | Apr 28 | Apr 22 | Apr 17 | Apr 12 | Apr 5 | Mar 28 |
| 28°F | Apr 20 | Apr 8 | Apr 1 | Mar 28 | Mar 22 | Mar 17 | Mar 11 | Mar 4 | Feb 22 |
| 24°F | Mar 15 | Mar 2 | Feb 25 | Feb 18 | Feb 10 | Jan 29 | Jan 14 | Jan 2 | Dec 17 |
| 20°F | Feb 22 | Feb 12 | Jan 28 | Jan 14 | Jan 2 | Dec 28 | Dec 18 | Dec 12 | Dec 5 |
| 16°F | Jan 18 | Jan 3 | Dec 28 | Dec 24 | Dec 19 | Dec 15 | Dec 14 | Dec 10 | Dec 9 |
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 7 | Sep 30 | Oct 19 |
| Freeze (32°F) | Sep 27 | Oct 21 | Nov 15 |
| Hard (28°F) | Oct 21 | Nov 15 | Dec 18 |
| Severe (24°F) | Nov 5 | Dec 11 | Feb 10 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 7 | Sep 14 | Sep 21 | Sep 26 | Sep 30 | Oct 3 | Oct 6 | Oct 12 | Oct 19 |
| 32°F | Sep 27 | Oct 3 | Oct 9 | Oct 15 | Oct 21 | Oct 26 | Nov 1 | Nov 7 | Nov 15 |
| 28°F | Oct 21 | Oct 30 | Nov 2 | Nov 9 | Nov 15 | Nov 23 | Dec 1 | Dec 6 | Dec 18 |
| 24°F | Nov 5 | Nov 17 | Nov 30 | Dec 5 | Dec 11 | Dec 21 | Jan 1 | Jan 16 | Feb 10 |
| 20°F | Nov 24 | Dec 5 | Dec 10 | Dec 15 | Dec 23 | Dec 31 | Jan 10 | Jan 27 | Feb 17 |
| 16°F | Dec 6 | Dec 10 | Dec 12 | Dec 14 | Dec 16 | Dec 20 | Dec 26 | Dec 31 | Jan 14 |
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: Tillamook, Or, about 16.1 miles away@if(!empty($station['elevation_ft'])), at 12 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 Wheeler, OR?
On average, the last spring frost (32°F) around Wheeler, OR is about Apr 22. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 28.
When is the first frost in the fall?
The first fall frost around Wheeler, OR 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 22 on average, or Mar 28 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 183 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 97147 Planting calendar → Oregon frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026