Growing season
69 days
Frost Dates for Gilchrist, OR
Hardiness zone
6a
Frost normals for this location are limited (the nearest long-term weather station may not report all thresholds). The available data is shown below.
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%) |
|---|---|---|---|
| Hard (28°F) | Jun 19 | May 28 | May 3 |
| Severe (24°F) | May 22 | Apr 29 | Apr 10 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 28°F | Jun 19 | Jun 12 | Jun 6 | Jun 1 | May 28 | May 21 | May 16 | May 10 | May 3 |
| 24°F | May 22 | May 12 | May 6 | May 2 | Apr 29 | Apr 26 | Apr 22 | Apr 16 | Apr 10 |
| 20°F | Apr 30 | Apr 24 | Apr 18 | Apr 13 | Apr 8 | Apr 4 | Mar 31 | Mar 27 | Mar 17 |
| 16°F | Apr 10 | Apr 3 | Mar 31 | Mar 26 | Mar 22 | Mar 17 | Mar 12 | Mar 6 | Feb 28 |
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%) |
|---|---|---|---|
| Hard (28°F) | Aug 31 | Sep 20 | Oct 9 |
| Severe (24°F) | Sep 18 | Oct 12 | Nov 3 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 28°F | Aug 31 | Sep 7 | Sep 11 | Sep 15 | Sep 20 | Sep 24 | Sep 28 | Oct 2 | Oct 9 |
| 24°F | Sep 18 | Sep 27 | Oct 2 | Oct 7 | Oct 12 | Oct 17 | Oct 21 | Oct 27 | Nov 3 |
| 20°F | Oct 13 | Oct 21 | Oct 26 | Oct 30 | Nov 2 | Nov 7 | Nov 11 | Nov 16 | Nov 23 |
| 16°F | Oct 28 | Nov 2 | Nov 9 | Nov 13 | Nov 17 | Nov 21 | Nov 25 | Nov 30 | Dec 5 |
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: Odell Lake-East, Or, about 10.7 miles away@if(!empty($station['elevation_ft'])), at 4,800 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
How long is the growing season here?
The frost-free growing season (between the last spring and first fall 32°F frost) is about 69 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 97737 Planting calendar → Oregon frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026