Last spring frost
Apr 24
Frost Dates for Naselle, WA
First fall frost
Oct 20
Growing season
179 days
Hardiness zone
8b
In an average year around Naselle, WA, the last spring frost (32°F) is about Apr 24 and the first fall frost is about Oct 20, giving roughly a 179-day growing season. To be safe most years, wait until Mar 31 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) | Jun 1 | May 13 | Apr 27 |
| Freeze (32°F) | May 11 | Apr 24 | Mar 31 |
| Hard (28°F) | Apr 16 | Mar 19 | Feb 21 |
| Severe (24°F) | Mar 10 | Feb 12 | Dec 20 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Jun 1 | May 27 | May 21 | May 17 | May 13 | May 10 | May 5 | Apr 30 | Apr 27 |
| 32°F | May 11 | May 4 | Apr 30 | Apr 27 | Apr 24 | Apr 19 | Apr 13 | Apr 8 | Mar 31 |
| 28°F | Apr 16 | Apr 5 | Mar 31 | Mar 25 | Mar 19 | Mar 14 | Mar 8 | Mar 1 | Feb 21 |
| 24°F | Mar 10 | Mar 1 | Feb 25 | Feb 19 | Feb 12 | Feb 5 | Jan 25 | Jan 7 | Dec 20 |
| 20°F | Feb 19 | Feb 9 | Jan 30 | Jan 16 | Jan 3 | Dec 28 | Dec 16 | Dec 6 | Nov 27 |
| 16°F | Feb 10 | Feb 1 | Jan 15 | Jan 1 | Dec 29 | Dec 17 | Dec 10 | Dec 4 | Nov 29 |
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 15 | Oct 1 | Oct 18 |
| Freeze (32°F) | Oct 1 | Oct 20 | Nov 7 |
| Hard (28°F) | Oct 20 | Nov 6 | Dec 6 |
| Severe (24°F) | Nov 2 | Dec 1 | Jan 14 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 15 | Sep 22 | Sep 26 | Sep 29 | Oct 1 | Oct 4 | Oct 7 | Oct 12 | Oct 18 |
| 32°F | Oct 1 | Oct 6 | Oct 12 | Oct 16 | Oct 20 | Oct 23 | Oct 27 | Oct 31 | Nov 7 |
| 28°F | Oct 20 | Oct 26 | Oct 29 | Nov 1 | Nov 6 | Nov 12 | Nov 19 | Nov 27 | Dec 6 |
| 24°F | Nov 2 | Nov 10 | Nov 19 | Nov 26 | Dec 1 | Dec 6 | Dec 15 | Dec 28 | Jan 14 |
| 20°F | Nov 14 | Nov 26 | Dec 1 | Dec 6 | Dec 14 | Dec 25 | Jan 4 | Jan 23 | Feb 8 |
| 16°F | Nov 28 | Dec 1 | Dec 8 | Dec 13 | Dec 21 | Dec 30 | Jan 3 | Jan 26 | 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: Naselle 2 Ene, Wa, about 1.5 miles away@if(!empty($station['elevation_ft'])), at 50 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 Naselle, WA?
On average, the last spring frost (32°F) around Naselle, WA is about Apr 24. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 31.
When is the first frost in the fall?
The first fall frost around Naselle, WA typically arrives about Oct 20. 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 24 on average, or Mar 31 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 179 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 98638 Planting calendar → Washington frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026