Last spring frost
Apr 11
Frost Dates for Klickitat, WA
First fall frost
Oct 26
Growing season
197 days
Hardiness zone
7b
In an average year around Klickitat, WA, the last spring frost (32°F) is about Apr 11 and the first fall frost is about Oct 26, giving roughly a 197-day growing season. To be safe most years, wait until Mar 24 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 12 | Apr 28 | Apr 13 |
| Freeze (32°F) | Apr 28 | Apr 11 | Mar 24 |
| Hard (28°F) | Apr 9 | Mar 16 | Feb 27 |
| Severe (24°F) | Mar 19 | Feb 25 | Jan 19 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 12 | May 7 | May 3 | Apr 30 | Apr 28 | Apr 26 | Apr 22 | Apr 18 | Apr 13 |
| 32°F | Apr 28 | Apr 24 | Apr 19 | Apr 15 | Apr 11 | Apr 7 | Apr 3 | Mar 30 | Mar 24 |
| 28°F | Apr 9 | Apr 1 | Mar 28 | Mar 22 | Mar 16 | Mar 12 | Mar 8 | Mar 4 | Feb 27 |
| 24°F | Mar 19 | Mar 9 | Mar 4 | Feb 28 | Feb 25 | Feb 21 | Feb 16 | Feb 6 | Jan 19 |
| 20°F | Mar 4 | Feb 26 | Feb 19 | Feb 14 | Feb 4 | Jan 25 | Jan 14 | Jan 4 | Dec 21 |
| 16°F | Feb 25 | Feb 16 | Feb 6 | Jan 29 | Jan 20 | Jan 11 | Jan 2 | Dec 22 | Dec 7 |
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 1 | Oct 13 | Oct 28 |
| Freeze (32°F) | Oct 9 | Oct 26 | Nov 10 |
| Hard (28°F) | Oct 22 | Nov 7 | Nov 28 |
| Severe (24°F) | Nov 1 | Nov 24 | Dec 25 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 1 | Oct 4 | Oct 7 | Oct 10 | Oct 13 | Oct 16 | Oct 19 | Oct 23 | Oct 28 |
| 32°F | Oct 9 | Oct 15 | Oct 19 | Oct 22 | Oct 26 | Oct 29 | Nov 1 | Nov 4 | Nov 10 |
| 28°F | Oct 22 | Oct 28 | Oct 31 | Nov 4 | Nov 7 | Nov 11 | Nov 15 | Nov 21 | Nov 28 |
| 24°F | Nov 1 | Nov 7 | Nov 13 | Nov 19 | Nov 24 | Nov 28 | Dec 3 | Dec 11 | Dec 25 |
| 20°F | Nov 10 | Nov 20 | Nov 27 | Dec 3 | Dec 9 | Dec 19 | Dec 27 | Jan 5 | Jan 21 |
| 16°F | Nov 18 | Nov 29 | Dec 6 | Dec 14 | Dec 24 | Dec 31 | Jan 8 | Jan 19 | 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: The Dalles Muni Ap, Wa, about 9.1 miles away@if(!empty($station['elevation_ft'])), at 235 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 Klickitat, WA?
On average, the last spring frost (32°F) around Klickitat, WA is about Apr 11. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 24.
When is the first frost in the fall?
The first fall frost around Klickitat, WA 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 11 on average, or Mar 24 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 197 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 98635 Planting calendar → Washington frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026