Last spring frost
Apr 15
Frost Dates for Amity, OR
First fall frost
Oct 26
Growing season
195 days
Hardiness zone
8b
In an average year around Amity, OR, the last spring frost (32°F) is about Apr 15 and the first fall frost is about Oct 26, giving roughly a 195-day growing season. To be safe most years, wait until Mar 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 29 | May 8 | Apr 21 |
| Freeze (32°F) | May 6 | Apr 15 | Mar 18 |
| Hard (28°F) | Apr 8 | Mar 3 | Jan 28 |
| Severe (24°F) | Feb 24 | Jan 20 | Dec 9 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 29 | May 21 | May 16 | May 11 | May 8 | May 4 | Apr 30 | Apr 28 | Apr 21 |
| 32°F | May 6 | Apr 30 | Apr 26 | Apr 21 | Apr 15 | Apr 9 | Apr 2 | Mar 27 | Mar 18 |
| 28°F | Apr 8 | Mar 26 | Mar 17 | Mar 10 | Mar 3 | Feb 26 | Feb 22 | Feb 15 | Jan 28 |
| 24°F | Feb 24 | Feb 16 | Feb 8 | Jan 30 | Jan 20 | Jan 10 | Jan 2 | Dec 23 | Dec 9 |
| 20°F | Feb 12 | Jan 29 | Jan 15 | Jan 7 | Jan 1 | Dec 25 | Dec 17 | Dec 10 | Nov 30 |
| 16°F | Jan 16 | Jan 8 | Jan 2 | Dec 29 | Dec 23 | Dec 18 | Dec 13 | Dec 9 | 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) | Sep 21 | Oct 7 | Oct 27 |
| Freeze (32°F) | Oct 5 | Oct 26 | Nov 19 |
| Hard (28°F) | Oct 22 | Nov 16 | Dec 17 |
| Severe (24°F) | Nov 10 | Dec 9 | Jan 22 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 21 | Sep 28 | Oct 1 | Oct 4 | Oct 7 | Oct 10 | Oct 15 | Oct 20 | Oct 27 |
| 32°F | Oct 5 | Oct 12 | Oct 17 | Oct 22 | Oct 26 | Oct 30 | Nov 3 | Nov 10 | Nov 19 |
| 28°F | Oct 22 | Oct 31 | Nov 6 | Nov 10 | Nov 16 | Nov 22 | Nov 29 | Dec 6 | Dec 17 |
| 24°F | Nov 10 | Nov 18 | Nov 26 | Dec 2 | Dec 9 | Dec 16 | Dec 24 | Jan 4 | Jan 22 |
| 20°F | Nov 24 | Dec 1 | Dec 7 | Dec 13 | Dec 18 | Dec 26 | Jan 1 | Jan 13 | Jan 31 |
| 16°F | Dec 2 | Dec 7 | Dec 10 | Dec 15 | Dec 20 | Dec 24 | Dec 29 | Jan 3 | Jan 15 |
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: Mcminnville Muni Ap, Or, about 8.6 miles away@if(!empty($station['elevation_ft'])), at 159 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 Amity, OR?
On average, the last spring frost (32°F) around Amity, OR is about Apr 15. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 18.
When is the first frost in the fall?
The first fall frost around Amity, OR typically arrives about Oct 26. 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 15 on average, or Mar 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 195 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 97101 Planting calendar → Oregon frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026