Last spring frost
Apr 3
Frost Dates for Marcola, OR
First fall frost
Nov 11
Growing season
220 days
Hardiness zone
8b
In an average year around Marcola, OR, the last spring frost (32°F) is about Apr 3 and the first fall frost is about Nov 11, giving roughly a 220-day growing season. To be safe most years, wait until Mar 5 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 22 | May 3 | Apr 13 |
| Freeze (32°F) | May 2 | Apr 3 | Mar 5 |
| Hard (28°F) | Mar 26 | Feb 22 | Jan 3 |
| Severe (24°F) | Feb 26 | Jan 13 | Dec 9 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 22 | May 15 | May 10 | May 7 | May 3 | Apr 30 | Apr 27 | Apr 22 | Apr 13 |
| 32°F | May 2 | Apr 24 | Apr 16 | Apr 9 | Apr 3 | Mar 30 | Mar 24 | Mar 16 | Mar 5 |
| 28°F | Mar 26 | Mar 14 | Mar 6 | Feb 28 | Feb 22 | Feb 15 | Feb 4 | Jan 22 | Jan 3 |
| 24°F | Feb 26 | Feb 16 | Feb 2 | Jan 23 | Jan 13 | Jan 5 | Dec 27 | Dec 18 | Dec 9 |
| 20°F | Feb 13 | Jan 26 | Jan 14 | Jan 2 | Dec 28 | Dec 22 | Dec 17 | Dec 13 | Dec 9 |
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) | Oct 1 | Oct 23 | Nov 10 |
| Freeze (32°F) | Oct 21 | Nov 11 | Dec 5 |
| Hard (28°F) | Nov 6 | Dec 4 | Jan 10 |
| Severe (24°F) | Nov 25 | Dec 19 | Feb 4 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 1 | Oct 8 | Oct 15 | Oct 19 | Oct 23 | Oct 26 | Oct 30 | Nov 3 | Nov 10 |
| 32°F | Oct 21 | Oct 28 | Nov 1 | Nov 6 | Nov 11 | Nov 16 | Nov 22 | Nov 29 | Dec 5 |
| 28°F | Nov 6 | Nov 15 | Nov 25 | Dec 1 | Dec 4 | Dec 10 | Dec 17 | Dec 27 | Jan 10 |
| 24°F | Nov 25 | Dec 2 | Dec 8 | Dec 13 | Dec 19 | Dec 28 | Jan 4 | Jan 18 | Feb 4 |
| 20°F | Dec 7 | Dec 9 | Dec 14 | Dec 17 | Dec 22 | Dec 30 | Jan 5 | Jan 19 | Feb 2 |
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: Leaburg 1 Sw, Or, about 4.1 miles away@if(!empty($station['elevation_ft'])), at 675 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 Marcola, OR?
On average, the last spring frost (32°F) around Marcola, OR is about Apr 3. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 5.
When is the first frost in the fall?
The first fall frost around Marcola, OR typically arrives about Nov 11. 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 3 on average, or Mar 5 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 220 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 97489 Planting calendar → Oregon frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026