Last spring frost
Apr 5
Frost Dates for Entiat, WA
First fall frost
Oct 24
Growing season
200 days
Hardiness zone
7a
In an average year around Entiat, WA, the last spring frost (32°F) is about Apr 5 and the first fall frost is about Oct 24, giving roughly a 200-day growing season. To be safe most years, wait until Mar 17 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 3 | May 2 | Apr 14 |
| Freeze (32°F) | May 2 | Apr 5 | Mar 17 |
| Hard (28°F) | Apr 4 | Mar 13 | Feb 26 |
| Severe (24°F) | Mar 19 | Feb 28 | Feb 7 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Jun 3 | May 18 | May 11 | May 6 | May 2 | Apr 29 | Apr 25 | Apr 20 | Apr 14 |
| 32°F | May 2 | Apr 21 | Apr 13 | Apr 8 | Apr 5 | Apr 1 | Mar 30 | Mar 25 | Mar 17 |
| 28°F | Apr 4 | Mar 30 | Mar 25 | Mar 19 | Mar 13 | Mar 10 | Mar 6 | Mar 3 | Feb 26 |
| 24°F | Mar 19 | Mar 10 | Mar 6 | Mar 2 | Feb 28 | Feb 24 | Feb 20 | Feb 14 | Feb 7 |
| 20°F | Mar 9 | Mar 2 | Feb 27 | Feb 21 | Feb 16 | Feb 11 | Feb 6 | Jan 31 | Jan 17 |
| 16°F | Feb 28 | Feb 21 | Feb 14 | Feb 7 | Feb 2 | Jan 27 | Jan 18 | Jan 11 | Jan 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) | Sep 16 | Oct 12 | Oct 27 |
| Freeze (32°F) | Sep 29 | Oct 24 | Nov 10 |
| Hard (28°F) | Oct 17 | Nov 7 | Nov 25 |
| Severe (24°F) | Oct 31 | Nov 20 | Dec 9 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 16 | Sep 29 | Oct 3 | Oct 7 | Oct 12 | Oct 16 | Oct 19 | Oct 22 | Oct 27 |
| 32°F | Sep 29 | Oct 10 | Oct 17 | Oct 21 | Oct 24 | Oct 27 | Oct 31 | Nov 4 | Nov 10 |
| 28°F | Oct 17 | Oct 26 | Oct 31 | Nov 3 | Nov 7 | Nov 10 | Nov 15 | Nov 20 | Nov 25 |
| 24°F | Oct 31 | Nov 6 | Nov 10 | Nov 16 | Nov 20 | Nov 24 | Nov 27 | Dec 1 | Dec 9 |
| 20°F | Nov 11 | Nov 19 | Nov 24 | Nov 28 | Dec 2 | Dec 6 | Dec 13 | Dec 21 | Jan 1 |
| 16°F | Nov 24 | Nov 30 | Dec 5 | Dec 10 | Dec 16 | Dec 21 | Dec 28 | Jan 3 | Jan 13 |
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: Entiat Fish Hatchery, Wa, about 3.4 miles away@if(!empty($station['elevation_ft'])), at 1,027 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 Entiat, WA?
On average, the last spring frost (32°F) around Entiat, WA is about Apr 5. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 17.
When is the first frost in the fall?
The first fall frost around Entiat, WA typically arrives about Oct 24. 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 17 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 200 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 98811 Planting calendar → Washington frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026