Last spring frost
Mar 17
Frost Dates for Beaver, OR
First fall frost
Nov 22
Growing season
251 days
Hardiness zone
9a
In an average year around Beaver, OR, the last spring frost (32°F) is about Mar 17 and the first fall frost is about Nov 22, giving roughly a 251-day growing season. To be safe most years, wait until Feb 9 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 15 | Apr 27 | Mar 31 |
| Freeze (32°F) | Apr 15 | Mar 17 | Feb 9 |
| Hard (28°F) | Feb 28 | Jan 25 | Dec 3 |
| Severe (24°F) | Feb 12 | Dec 31 | Dec 2 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 15 | May 8 | May 3 | Apr 29 | Apr 27 | Apr 22 | Apr 16 | Apr 9 | Mar 31 |
| 32°F | Apr 15 | Apr 5 | Mar 31 | Mar 25 | Mar 17 | Mar 8 | Feb 28 | Feb 22 | Feb 9 |
| 28°F | Feb 28 | Feb 21 | Feb 14 | Feb 4 | Jan 25 | Jan 12 | Dec 31 | Dec 14 | Dec 3 |
| 24°F | Feb 12 | Feb 2 | Jan 18 | Jan 4 | Dec 31 | Dec 22 | Dec 15 | 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) | Oct 2 | Oct 26 | Nov 21 |
| Freeze (32°F) | Oct 26 | Nov 22 | Dec 31 |
| Hard (28°F) | Nov 8 | Dec 13 | Feb 14 |
| Severe (24°F) | Nov 30 | Dec 24 | Feb 9 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 2 | Oct 10 | Oct 17 | Oct 22 | Oct 26 | Oct 30 | Nov 4 | Nov 12 | Nov 21 |
| 32°F | Oct 26 | Nov 1 | Nov 9 | Nov 15 | Nov 22 | Nov 29 | Dec 5 | Dec 12 | Dec 31 |
| 28°F | Nov 8 | Nov 21 | Dec 1 | Dec 6 | Dec 13 | Dec 27 | Jan 6 | Jan 26 | Feb 14 |
| 24°F | Nov 30 | Dec 6 | Dec 12 | Dec 16 | Dec 24 | Jan 1 | Jan 11 | Jan 31 | Feb 9 |
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: Cloverdale, Or, about 4.9 miles away@if(!empty($station['elevation_ft'])), at 12 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 Mar 17. In cooler years it can run later, so for a safer bet many gardeners wait until Feb 9.
When is the first frost in the fall?
The first fall frost around Beaver, OR typically arrives about Nov 22. 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 17 on average, or Feb 9 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 251 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 97112 Planting calendar → Oregon frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026