Last spring frost
Mar 28
Frost Dates for Coquille, OR
First fall frost
Nov 6
Growing season
225 days
Hardiness zone
9a
In an average year around Coquille, OR, the last spring frost (32°F) is about Mar 28 and the first fall frost is about Nov 6, giving roughly a 225-day growing season. To be safe most years, wait until Feb 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) | May 19 | Apr 30 | Apr 7 |
| Freeze (32°F) | Apr 27 | Mar 28 | Feb 22 |
| Hard (28°F) | Mar 22 | Feb 16 | Dec 28 |
| Severe (24°F) | Feb 19 | Dec 31 | Dec 2 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 19 | May 13 | May 7 | May 4 | Apr 30 | Apr 27 | Apr 22 | Apr 16 | Apr 7 |
| 32°F | Apr 27 | Apr 16 | Apr 9 | Apr 1 | Mar 28 | Mar 22 | Mar 14 | Mar 2 | Feb 22 |
| 28°F | Mar 22 | Mar 6 | Feb 28 | Feb 23 | Feb 16 | Feb 6 | Jan 28 | Jan 13 | Dec 28 |
| 24°F | Feb 19 | Feb 5 | Jan 15 | Jan 6 | Dec 31 | Dec 25 | Dec 18 | Dec 11 | Dec 2 |
| 20°F | Jan 6 | Dec 31 | Dec 29 | Dec 25 | Dec 19 | Dec 16 | Dec 10 | Dec 8 | 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 30 | Oct 18 | Nov 9 |
| Freeze (32°F) | Oct 17 | Nov 6 | Dec 6 |
| Hard (28°F) | Nov 2 | Dec 2 | Jan 13 |
| Severe (24°F) | Nov 14 | Dec 15 | Feb 8 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 30 | Oct 4 | Oct 8 | Oct 14 | Oct 18 | Oct 22 | Oct 27 | Nov 1 | Nov 9 |
| 32°F | Oct 17 | Oct 25 | Oct 29 | Nov 1 | Nov 6 | Nov 12 | Nov 19 | Nov 26 | Dec 6 |
| 28°F | Nov 2 | Nov 11 | Nov 19 | Nov 28 | Dec 2 | Dec 8 | Dec 15 | Dec 30 | Jan 13 |
| 24°F | Nov 14 | Nov 29 | Dec 5 | Dec 9 | Dec 15 | Dec 21 | Dec 30 | Jan 8 | Feb 8 |
| 20°F | Dec 1 | Dec 6 | Dec 9 | Dec 12 | Dec 16 | Dec 21 | Dec 26 | Dec 29 | Jan 1 |
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: Coquille City, Or, about 1.4 miles away@if(!empty($station['elevation_ft'])), at 23 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 Coquille, OR?
On average, the last spring frost (32°F) around Coquille, OR is about Mar 28. In cooler years it can run later, so for a safer bet many gardeners wait until Feb 22.
When is the first frost in the fall?
The first fall frost around Coquille, OR typically arrives about Nov 6. 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 Mar 28 on average, or Feb 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 225 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 97423 Planting calendar → Oregon frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026