Last spring frost
Apr 11
Frost Dates for Halsey, OR
First fall frost
Oct 30
Growing season
203 days
Hardiness zone
8b
In an average year around Halsey, OR, the last spring frost (32°F) is about Apr 11 and the first fall frost is about Oct 30, giving roughly a 203-day growing season. To be safe most years, wait until Mar 11 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 30 | May 11 | Apr 23 |
| Freeze (32°F) | May 5 | Apr 11 | Mar 11 |
| Hard (28°F) | Mar 30 | Feb 28 | Jan 27 |
| Severe (24°F) | Feb 28 | Feb 1 | Dec 14 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 30 | May 23 | May 18 | May 14 | May 11 | May 6 | May 2 | Apr 29 | Apr 23 |
| 32°F | May 5 | Apr 29 | Apr 24 | Apr 17 | Apr 11 | Apr 5 | Mar 31 | Mar 24 | Mar 11 |
| 28°F | Mar 30 | Mar 21 | Mar 12 | Mar 5 | Feb 28 | Feb 25 | Feb 19 | Feb 12 | Jan 27 |
| 24°F | Feb 28 | Feb 23 | Feb 16 | Feb 9 | Feb 1 | Jan 23 | Jan 9 | Dec 31 | Dec 14 |
| 20°F | Feb 21 | Feb 4 | Jan 24 | Jan 13 | Jan 4 | Dec 29 | Dec 20 | Dec 12 | Dec 3 |
| 16°F | Feb 2 | Jan 9 | Dec 31 | Dec 26 | Dec 22 | Dec 16 | Dec 12 | Dec 7 | Dec 3 |
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 28 | Oct 11 | Nov 1 |
| Freeze (32°F) | Oct 8 | Oct 30 | Nov 25 |
| Hard (28°F) | Oct 27 | Nov 20 | Dec 22 |
| Severe (24°F) | Nov 11 | Dec 11 | Jan 27 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 28 | Oct 1 | Oct 4 | Oct 7 | Oct 11 | Oct 16 | Oct 20 | Oct 25 | Nov 1 |
| 32°F | Oct 8 | Oct 16 | Oct 21 | Oct 26 | Oct 30 | Nov 2 | Nov 8 | Nov 16 | Nov 25 |
| 28°F | Oct 27 | Nov 2 | Nov 9 | Nov 14 | Nov 20 | Nov 26 | Dec 2 | Dec 10 | Dec 22 |
| 24°F | Nov 11 | Nov 22 | Nov 29 | Dec 4 | Dec 11 | Dec 19 | Dec 27 | Jan 6 | Jan 27 |
| 20°F | Nov 26 | Dec 2 | Dec 8 | Dec 15 | Dec 23 | Dec 29 | Jan 5 | Jan 16 | Feb 4 |
| 16°F | Dec 1 | Dec 5 | Dec 10 | Dec 14 | Dec 18 | Dec 22 | Dec 28 | Jan 1 | Jan 25 |
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: Corvallis 10 Ssw, Or, about 10.3 miles away@if(!empty($station['elevation_ft'])), at 312 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 Halsey, OR?
On average, the last spring frost (32°F) around Halsey, OR is about Apr 11. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 11.
When is the first frost in the fall?
The first fall frost around Halsey, OR typically arrives about Oct 30. 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 11 on average, or Mar 11 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 203 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 97348 Planting calendar → Oregon frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026