Last spring frost
Apr 29
Frost Dates for Endicott, WA
First fall frost
Oct 4
Growing season
161 days
Hardiness zone
7a
In an average year around Endicott, WA, the last spring frost (32°F) is about Apr 29 and the first fall frost is about Oct 4, giving roughly a 161-day growing season. To be safe most years, wait until Apr 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) | Jun 7 | May 16 | Apr 30 |
| Freeze (32°F) | May 15 | Apr 29 | Apr 9 |
| Hard (28°F) | Apr 29 | Apr 5 | Mar 11 |
| Severe (24°F) | Apr 6 | Mar 11 | Feb 15 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Jun 7 | May 30 | May 24 | May 20 | May 16 | May 13 | May 9 | May 4 | Apr 30 |
| 32°F | May 15 | May 9 | May 5 | May 1 | Apr 29 | Apr 26 | Apr 22 | Apr 17 | Apr 9 |
| 28°F | Apr 29 | Apr 22 | Apr 16 | Apr 10 | Apr 5 | Apr 1 | Mar 28 | Mar 21 | Mar 11 |
| 24°F | Apr 6 | Mar 30 | Mar 22 | Mar 16 | Mar 11 | Mar 6 | Mar 2 | Feb 24 | Feb 15 |
| 20°F | Mar 14 | Mar 7 | Mar 1 | Feb 26 | Feb 21 | Feb 15 | Feb 5 | Jan 29 | Jan 14 |
| 16°F | Mar 4 | Feb 26 | Feb 18 | Feb 10 | Feb 2 | Jan 26 | Jan 16 | Jan 7 | Dec 26 |
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 4 | Sep 23 | Oct 9 |
| Freeze (32°F) | Sep 19 | Oct 4 | Oct 23 |
| Hard (28°F) | Oct 2 | Oct 20 | Nov 11 |
| Severe (24°F) | Oct 14 | Nov 2 | Nov 29 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 4 | Sep 11 | Sep 16 | Sep 19 | Sep 23 | Sep 26 | Sep 30 | Oct 3 | Oct 9 |
| 32°F | Sep 19 | Sep 26 | Sep 30 | Oct 2 | Oct 4 | Oct 8 | Oct 12 | Oct 18 | Oct 23 |
| 28°F | Oct 2 | Oct 7 | Oct 12 | Oct 16 | Oct 20 | Oct 24 | Oct 28 | Nov 1 | Nov 11 |
| 24°F | Oct 14 | Oct 20 | Oct 25 | Oct 30 | Nov 2 | Nov 8 | Nov 14 | Nov 21 | Nov 29 |
| 20°F | Oct 23 | Nov 1 | Nov 7 | Nov 14 | Nov 21 | Nov 27 | Dec 1 | Dec 6 | Dec 16 |
| 16°F | Nov 3 | Nov 15 | Nov 25 | Nov 30 | Dec 5 | Dec 9 | Dec 16 | Dec 23 | Jan 5 |
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: St John, Wa, about 11.8 miles away@if(!empty($station['elevation_ft'])), at 1,952 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 Endicott, WA?
On average, the last spring frost (32°F) around Endicott, WA is about Apr 29. In cooler years it can run later, so for a safer bet many gardeners wait until Apr 9.
When is the first frost in the fall?
The first fall frost around Endicott, WA typically arrives about Oct 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 29 on average, or Apr 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 161 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 99125 Planting calendar → Washington frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026