Last spring frost
Apr 16
Frost Dates for Cherry Grove, OR
First fall frost
Oct 26
Growing season
192 days
Hardiness zone
8b
In an average year around Cherry Grove, OR, the last spring frost (32°F) is about Apr 16 and the first fall frost is about Oct 26, giving roughly a 192-day growing season. To be safe most years, wait until Mar 26 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 25 | May 4 | Apr 19 |
| Freeze (32°F) | May 5 | Apr 16 | Mar 26 |
| Hard (28°F) | Apr 12 | Mar 19 | Feb 21 |
| Severe (24°F) | Mar 16 | Feb 17 | Jan 5 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 25 | May 17 | May 12 | May 7 | May 4 | May 1 | Apr 29 | Apr 26 | Apr 19 |
| 32°F | May 5 | Apr 30 | Apr 26 | Apr 20 | Apr 16 | Apr 11 | Apr 6 | Apr 1 | Mar 26 |
| 28°F | Apr 12 | Apr 3 | Mar 30 | Mar 24 | Mar 19 | Mar 13 | Mar 6 | Feb 28 | Feb 21 |
| 24°F | Mar 16 | Mar 3 | Feb 28 | Feb 23 | Feb 17 | Feb 11 | Feb 1 | Jan 21 | Jan 5 |
| 20°F | Feb 23 | Feb 16 | Feb 6 | Jan 30 | Jan 18 | Jan 7 | Jan 1 | Dec 19 | Dec 8 |
| 16°F | Feb 13 | Feb 4 | Jan 24 | Jan 10 | Jan 2 | Dec 27 | Dec 17 | Dec 10 | Dec 2 |
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 24 | Oct 8 | Oct 30 |
| Freeze (32°F) | Oct 6 | Oct 26 | Nov 14 |
| Hard (28°F) | Oct 23 | Nov 11 | Dec 5 |
| Severe (24°F) | Nov 6 | Nov 30 | Jan 1 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 24 | Sep 30 | Oct 2 | Oct 5 | Oct 8 | Oct 13 | Oct 16 | Oct 21 | Oct 30 |
| 32°F | Oct 6 | Oct 13 | Oct 18 | Oct 22 | Oct 26 | Oct 30 | Nov 3 | Nov 7 | Nov 14 |
| 28°F | Oct 23 | Oct 29 | Nov 2 | Nov 7 | Nov 11 | Nov 16 | Nov 21 | Nov 27 | Dec 5 |
| 24°F | Nov 6 | Nov 13 | Nov 19 | Nov 25 | Nov 30 | Dec 5 | Dec 11 | Dec 19 | Jan 1 |
| 20°F | Nov 16 | Nov 27 | Dec 2 | Dec 8 | Dec 15 | Dec 22 | Dec 29 | Jan 6 | Jan 25 |
| 16°F | Nov 26 | Dec 3 | Dec 8 | Dec 13 | Dec 22 | Dec 28 | Jan 5 | Jan 21 | Feb 7 |
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: Forest Grove, Or, about 6.8 miles away@if(!empty($station['elevation_ft'])), at 180 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 Cherry Grove, OR?
On average, the last spring frost (32°F) around Cherry Grove, OR is about Apr 16. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 26.
When is the first frost in the fall?
The first fall frost around Cherry Grove, OR typically arrives about Oct 26. 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 16 on average, or Mar 26 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 192 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 97119 Planting calendar → Oregon frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026