Last spring frost
Jun 8
Frost Dates for Paisley, OR
First fall frost
Sep 15
Growing season
96 days
Hardiness zone
6b
In an average year around Paisley, OR, the last spring frost (32°F) is about Jun 8 and the first fall frost is about Sep 15, giving roughly a 96-day growing season. To be safe most years, wait until May 20 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%) |
|---|---|---|---|
| Freeze (32°F) | Jun 25 | Jun 8 | May 20 |
| Hard (28°F) | Jun 10 | May 18 | Apr 30 |
| Severe (24°F) | May 17 | Apr 29 | Apr 10 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 32°F | Jun 25 | Jun 21 | Jun 16 | Jun 11 | Jun 8 | Jun 5 | Jun 1 | May 27 | May 20 |
| 28°F | Jun 10 | Jun 3 | May 29 | May 24 | May 18 | May 14 | May 9 | May 5 | Apr 30 |
| 24°F | May 17 | May 9 | May 5 | May 1 | Apr 29 | Apr 25 | Apr 22 | Apr 18 | Apr 10 |
| 20°F | May 4 | Apr 27 | Apr 20 | Apr 15 | Apr 9 | Apr 4 | Mar 31 | Mar 26 | Mar 18 |
| 16°F | Apr 13 | Apr 4 | Mar 28 | Mar 21 | Mar 15 | Mar 9 | Mar 3 | Feb 26 | Feb 19 |
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%) |
|---|---|---|---|
| Freeze (32°F) | Aug 31 | Sep 15 | Sep 28 |
| Hard (28°F) | Sep 12 | Sep 29 | Oct 12 |
| Severe (24°F) | Sep 29 | Oct 12 | Oct 29 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 32°F | Aug 31 | Sep 5 | Sep 9 | Sep 12 | Sep 15 | Sep 18 | Sep 20 | Sep 24 | Sep 28 |
| 28°F | Sep 12 | Sep 18 | Sep 22 | Sep 26 | Sep 29 | Oct 1 | Oct 4 | Oct 7 | Oct 12 |
| 24°F | Sep 29 | Oct 2 | Oct 5 | Oct 9 | Oct 12 | Oct 15 | Oct 19 | Oct 23 | Oct 29 |
| 20°F | Oct 9 | Oct 15 | Oct 19 | Oct 23 | Oct 26 | Oct 28 | Nov 1 | Nov 4 | Nov 12 |
| 16°F | Oct 22 | Oct 27 | Oct 31 | Nov 3 | Nov 6 | Nov 11 | Nov 16 | Nov 22 | Nov 30 |
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: Summer Lake 1 S, Or, about 12.9 miles away@if(!empty($station['elevation_ft'])), at 4,192 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 Paisley, OR?
On average, the last spring frost (32°F) around Paisley, OR is about Jun 8. In cooler years it can run later, so for a safer bet many gardeners wait until May 20.
When is the first frost in the fall?
The first fall frost around Paisley, OR typically arrives about Sep 15. 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 8 on average, or May 20 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 96 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 97640 Planting calendar → Oregon frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026