Last spring frost
Apr 5
Frost Dates for Beaver, OR
First fall frost
Nov 4
Growing season
219 days
Hardiness zone
8b
In an average year around Beaver, OR, the last spring frost (32°F) is about Apr 5 and the first fall frost is about Nov 4, giving roughly a 219-day growing season. To be safe most years, wait until Mar 1 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 7 | Apr 18 |
| Freeze (32°F) | May 4 | Apr 5 | Mar 1 |
| Hard (28°F) | Mar 26 | Feb 19 | Dec 17 |
| Severe (24°F) | Feb 21 | Jan 4 | Nov 28 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 25 | May 20 | May 16 | May 11 | May 7 | May 4 | Apr 30 | Apr 26 | Apr 18 |
| 32°F | May 4 | Apr 27 | Apr 19 | Apr 11 | Apr 5 | Mar 31 | Mar 25 | Mar 15 | Mar 1 |
| 28°F | Mar 26 | Mar 11 | Mar 3 | Feb 26 | Feb 19 | Feb 13 | Jan 31 | Jan 9 | Dec 17 |
| 24°F | Feb 21 | Feb 11 | Feb 1 | Jan 18 | Jan 4 | Dec 28 | Dec 15 | Dec 7 | Nov 28 |
| 20°F | Feb 15 | Feb 8 | Feb 1 | Jan 15 | Dec 31 | Dec 24 | Dec 19 | 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) | Sep 23 | Oct 12 | Nov 3 |
| Freeze (32°F) | Oct 13 | Nov 4 | Dec 7 |
| Hard (28°F) | Nov 1 | Dec 4 | Feb 10 |
| Severe (24°F) | Nov 14 | Dec 19 | Feb 10 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 23 | Sep 30 | Oct 3 | Oct 6 | Oct 12 | Oct 16 | Oct 21 | Oct 27 | Nov 3 |
| 32°F | Oct 13 | Oct 21 | Oct 26 | Oct 31 | Nov 4 | Nov 10 | Nov 18 | Nov 26 | Dec 7 |
| 28°F | Nov 1 | Nov 12 | Nov 22 | Nov 29 | Dec 4 | Dec 12 | Dec 22 | Jan 5 | Feb 10 |
| 24°F | Nov 14 | Nov 30 | Dec 5 | Dec 10 | Dec 19 | Dec 27 | Jan 7 | Jan 29 | Feb 10 |
| 20°F | Dec 8 | Dec 12 | Dec 18 | Dec 22 | Dec 29 | Jan 9 | Feb 1 | Feb 6 | Feb 15 |
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: Tillamook 6Se, Or, about 11.5 miles away@if(!empty($station['elevation_ft'])), at 140 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 Beaver, OR?
On average, the last spring frost (32°F) around Beaver, OR is about Apr 5. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 1.
When is the first frost in the fall?
The first fall frost around Beaver, OR typically arrives about Nov 4. 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 5 on average, or Mar 1 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 219 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 97108 Planting calendar → Oregon frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026