Last spring frost
Apr 23
Frost Dates for Fruitland, ID
First fall frost
Oct 13
Growing season
173 days
Hardiness zone
7a
In an average year around Fruitland, ID, the last spring frost (32°F) is about Apr 23 and the first fall frost is about Oct 13, giving roughly a 173-day growing season. To be safe most years, wait until Apr 6 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 24 | May 6 | Apr 22 |
| Freeze (32°F) | May 9 | Apr 23 | Apr 6 |
| Hard (28°F) | Apr 25 | Apr 6 | Mar 15 |
| Severe (24°F) | Apr 7 | Mar 12 | Feb 21 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 24 | May 16 | May 13 | May 9 | May 6 | May 3 | Apr 30 | Apr 27 | Apr 22 |
| 32°F | May 9 | May 3 | Apr 30 | Apr 27 | Apr 23 | Apr 20 | Apr 17 | Apr 11 | Apr 6 |
| 28°F | Apr 25 | Apr 19 | Apr 14 | Apr 9 | Apr 6 | Apr 2 | Mar 30 | Mar 25 | Mar 15 |
| 24°F | Apr 7 | Apr 1 | Mar 27 | Mar 18 | Mar 12 | Mar 7 | Mar 3 | Feb 27 | Feb 21 |
| 20°F | Mar 13 | Mar 6 | Mar 1 | Feb 26 | Feb 22 | Feb 18 | Feb 13 | Feb 8 | Jan 30 |
| 16°F | Mar 1 | Feb 23 | Feb 17 | Feb 13 | Feb 8 | Feb 3 | Jan 27 | Jan 15 | Jan 5 |
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 20 | Oct 2 | Oct 16 |
| Freeze (32°F) | Oct 1 | Oct 13 | Oct 29 |
| Hard (28°F) | Oct 12 | Oct 26 | Nov 10 |
| Severe (24°F) | Oct 24 | Nov 8 | Nov 23 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 20 | Sep 25 | Sep 28 | Sep 30 | Oct 2 | Oct 5 | Oct 8 | Oct 11 | Oct 16 |
| 32°F | Oct 1 | Oct 5 | Oct 8 | Oct 11 | Oct 13 | Oct 16 | Oct 19 | Oct 23 | Oct 29 |
| 28°F | Oct 12 | Oct 17 | Oct 20 | Oct 24 | Oct 26 | Oct 30 | Nov 1 | Nov 6 | Nov 10 |
| 24°F | Oct 24 | Oct 29 | Nov 1 | Nov 4 | Nov 8 | Nov 11 | Nov 15 | Nov 18 | Nov 23 |
| 20°F | Nov 1 | Nov 7 | Nov 11 | Nov 16 | Nov 20 | Nov 23 | Nov 27 | Nov 30 | Dec 6 |
| 16°F | Nov 8 | Nov 15 | Nov 23 | Nov 27 | Dec 1 | Dec 5 | Dec 10 | Dec 19 | Dec 30 |
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: Malheur Branch Exp Stn, Or, about 5.7 miles away@if(!empty($station['elevation_ft'])), at 2,260 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 Fruitland, ID?
On average, the last spring frost (32°F) around Fruitland, ID is about Apr 23. In cooler years it can run later, so for a safer bet many gardeners wait until Apr 6.
When is the first frost in the fall?
The first fall frost around Fruitland, ID typically arrives about Oct 13. 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 23 on average, or Apr 6 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 173 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 83619 Planting calendar → Idaho frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026