Last spring frost
Apr 17
Frost Dates for Tangent, OR
First fall frost
Oct 28
Growing season
194 days
Hardiness zone
8b
In an average year around Tangent, OR, the last spring frost (32°F) is about Apr 17 and the first fall frost is about Oct 28, giving roughly a 194-day growing season. To be safe most years, wait until Mar 22 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 2 | May 11 | Apr 25 |
| Freeze (32°F) | May 8 | Apr 17 | Mar 22 |
| Hard (28°F) | Apr 5 | Mar 1 | Jan 25 |
| Severe (24°F) | Feb 24 | Jan 24 | Dec 10 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Jun 2 | May 25 | May 20 | May 15 | May 11 | May 7 | May 3 | Apr 29 | Apr 25 |
| 32°F | May 8 | May 1 | Apr 27 | Apr 23 | Apr 17 | Apr 12 | Apr 6 | Mar 31 | Mar 22 |
| 28°F | Apr 5 | Mar 26 | Mar 16 | Mar 8 | Mar 1 | Feb 26 | Feb 19 | Feb 13 | Jan 25 |
| 24°F | Feb 24 | Feb 18 | Feb 11 | Feb 1 | Jan 24 | Jan 13 | Jan 3 | Dec 26 | Dec 10 |
| 20°F | Feb 11 | Jan 30 | Jan 16 | Jan 7 | Dec 31 | Dec 25 | Dec 17 | Dec 11 | Dec 2 |
| 16°F | Feb 4 | Jan 14 | Jan 1 | Dec 30 | Dec 23 | Dec 16 | Dec 13 | Dec 7 | Dec 4 |
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 23 | Oct 10 | Oct 28 |
| Freeze (32°F) | Oct 5 | Oct 28 | Nov 19 |
| Hard (28°F) | Oct 22 | Nov 17 | Dec 18 |
| Severe (24°F) | Nov 7 | Dec 5 | Jan 13 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 23 | Sep 30 | Oct 2 | Oct 6 | Oct 10 | Oct 14 | Oct 17 | Oct 23 | Oct 28 |
| 32°F | Oct 5 | Oct 14 | Oct 20 | Oct 25 | Oct 28 | Nov 1 | Nov 4 | Nov 10 | Nov 19 |
| 28°F | Oct 22 | Nov 1 | Nov 5 | Nov 12 | Nov 17 | Nov 23 | Nov 30 | Dec 6 | Dec 18 |
| 24°F | Nov 7 | Nov 16 | Nov 24 | Nov 30 | Dec 5 | Dec 11 | Dec 22 | Dec 30 | Jan 13 |
| 20°F | Nov 20 | Nov 30 | Dec 6 | Dec 11 | Dec 19 | Dec 24 | Dec 30 | Jan 9 | Jan 24 |
| 16°F | Dec 1 | Dec 5 | Dec 8 | Dec 12 | Dec 18 | Dec 23 | Dec 29 | Jan 1 | Jan 26 |
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 State Univ, Or, about 8.6 miles away@if(!empty($station['elevation_ft'])), at 225 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 Tangent, OR?
On average, the last spring frost (32°F) around Tangent, OR is about Apr 17. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 22.
When is the first frost in the fall?
The first fall frost around Tangent, OR typically arrives about Oct 28. 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 17 on average, or Mar 22 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 194 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 97389 Planting calendar → Oregon frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026