Last spring frost
Jun 8
Frost Dates for Ashland, OR
First fall frost
Sep 24
Growing season
108 days
Hardiness zone
8a
In an average year around Ashland, OR, the last spring frost (32°F) is about Jun 8 and the first fall frost is about Sep 24, giving roughly a 108-day growing season. To be safe most years, wait until May 17 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 17 |
| Hard (28°F) | May 31 | May 7 | Apr 22 |
| Severe (24°F) | May 5 | Apr 15 | Mar 24 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 32°F | Jun 25 | Jun 20 | Jun 17 | Jun 12 | Jun 8 | Jun 3 | May 31 | May 25 | May 17 |
| 28°F | May 31 | May 24 | May 16 | May 11 | May 7 | May 3 | Apr 30 | Apr 27 | Apr 22 |
| 24°F | May 5 | Apr 29 | Apr 24 | Apr 19 | Apr 15 | Apr 11 | Apr 6 | Apr 2 | Mar 24 |
| 20°F | Apr 13 | Apr 7 | Apr 2 | Mar 28 | Mar 23 | Mar 19 | Mar 14 | Mar 8 | Feb 28 |
| 16°F | Mar 27 | Mar 20 | Mar 15 | Mar 11 | Mar 6 | Mar 2 | Feb 26 | Feb 20 | Feb 8 |
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) | Sep 6 | Sep 24 | Oct 10 |
| Hard (28°F) | Sep 27 | Oct 14 | Oct 30 |
| Severe (24°F) | Oct 16 | Nov 2 | Nov 22 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 32°F | Sep 6 | Sep 12 | Sep 16 | Sep 20 | Sep 24 | Sep 26 | Oct 1 | Oct 5 | Oct 10 |
| 28°F | Sep 27 | Oct 1 | Oct 6 | Oct 10 | Oct 14 | Oct 17 | Oct 21 | Oct 25 | Oct 30 |
| 24°F | Oct 16 | Oct 23 | Oct 26 | Oct 30 | Nov 2 | Nov 5 | Nov 11 | Nov 16 | Nov 22 |
| 20°F | Oct 31 | Nov 5 | Nov 11 | Nov 15 | Nov 19 | Nov 23 | Nov 27 | Dec 1 | Dec 7 |
| 16°F | Nov 11 | Nov 17 | Nov 23 | Nov 28 | Dec 1 | Dec 6 | Dec 11 | Dec 17 | Dec 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: Howard Prairie Dam, Or, about 7.8 miles away@if(!empty($station['elevation_ft'])), at 4,567 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 Ashland, OR?
On average, the last spring frost (32°F) around Ashland, OR is about Jun 8. In cooler years it can run later, so for a safer bet many gardeners wait until May 17.
When is the first frost in the fall?
The first fall frost around Ashland, OR typically arrives about Sep 24. 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 17 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 108 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 97520 Planting calendar → Oregon frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026