Last spring frost
Jun 5
Frost Dates for Long Creek, OR
First fall frost
Sep 14
Growing season
99 days
Hardiness zone
6b
In an average year around Long Creek, OR, the last spring frost (32°F) is about Jun 5 and the first fall frost is about Sep 14, giving roughly a 99-day growing season. To be safe most years, wait until May 16 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 5 | May 16 |
| Hard (28°F) | Jun 5 | May 13 | Apr 28 |
| Severe (24°F) | May 13 | Apr 27 | Apr 8 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 32°F | Jun 25 | Jun 19 | Jun 14 | Jun 10 | Jun 5 | Jun 2 | May 29 | May 24 | May 16 |
| 28°F | Jun 5 | May 29 | May 22 | May 17 | May 13 | May 10 | May 6 | May 2 | Apr 28 |
| 24°F | May 13 | May 7 | May 3 | Apr 30 | Apr 27 | Apr 23 | Apr 19 | Apr 14 | Apr 8 |
| 20°F | Apr 26 | Apr 18 | Apr 11 | Apr 5 | Mar 31 | Mar 27 | Mar 22 | Mar 15 | Mar 8 |
| 16°F | Apr 2 | Mar 25 | Mar 19 | Mar 13 | Mar 8 | Mar 4 | Feb 28 | Feb 24 | Feb 15 |
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) | Aug 30 | Sep 14 | Oct 3 |
| Hard (28°F) | Sep 11 | Oct 1 | Oct 18 |
| Severe (24°F) | Sep 27 | Oct 16 | Nov 5 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 32°F | Aug 30 | Sep 4 | Sep 7 | Sep 10 | Sep 14 | Sep 18 | Sep 22 | Sep 27 | Oct 3 |
| 28°F | Sep 11 | Sep 18 | Sep 22 | Sep 27 | Oct 1 | Oct 4 | Oct 8 | Oct 12 | Oct 18 |
| 24°F | Sep 27 | Oct 4 | Oct 8 | Oct 12 | Oct 16 | Oct 20 | Oct 24 | Oct 30 | Nov 5 |
| 20°F | Oct 11 | Oct 18 | Oct 22 | Oct 28 | Nov 1 | Nov 4 | Nov 9 | Nov 15 | Nov 23 |
| 16°F | Oct 21 | Oct 28 | Nov 2 | Nov 9 | Nov 14 | Nov 20 | Nov 24 | Nov 28 | Dec 4 |
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: Long Creek, Or, about 4.4 miles away@if(!empty($station['elevation_ft'])), at 3,740 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 Long Creek, OR?
On average, the last spring frost (32°F) around Long Creek, OR is about Jun 5. In cooler years it can run later, so for a safer bet many gardeners wait until May 16.
When is the first frost in the fall?
The first fall frost around Long Creek, OR typically arrives about Sep 14. 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 5 on average, or May 16 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 99 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 97856 Planting calendar → Oregon frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026