Last spring frost
May 29
Frost Dates for Salina, UT
First fall frost
Sep 26
Growing season
118 days
Hardiness zone
6a
In an average year around Salina, UT, the last spring frost (32°F) is about May 29 and the first fall frost is about Sep 26, giving roughly a 118-day growing season. To be safe most years, wait until May 12 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 25 | Jun 9 | May 26 |
| Freeze (32°F) | Jun 15 | May 29 | May 12 |
| Hard (28°F) | May 31 | May 13 | Apr 28 |
| Severe (24°F) | May 17 | May 1 | Apr 13 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Jun 25 | Jun 20 | Jun 17 | Jun 14 | Jun 9 | Jun 5 | Jun 3 | May 31 | May 26 |
| 32°F | Jun 15 | Jun 8 | Jun 3 | May 31 | May 29 | May 26 | May 23 | May 18 | May 12 |
| 28°F | May 31 | May 26 | May 21 | May 17 | May 13 | May 10 | May 7 | May 2 | Apr 28 |
| 24°F | May 17 | May 12 | May 8 | May 4 | May 1 | Apr 28 | Apr 24 | Apr 20 | Apr 13 |
| 20°F | May 6 | Apr 30 | Apr 27 | Apr 22 | Apr 18 | Apr 14 | Apr 10 | Apr 5 | Mar 30 |
| 16°F | Apr 24 | Apr 18 | Apr 12 | Apr 7 | Apr 4 | Mar 31 | Mar 25 | Mar 18 | Mar 10 |
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 17 | Sep 28 |
| Freeze (32°F) | Sep 12 | Sep 26 | Oct 9 |
| Hard (28°F) | Sep 22 | Oct 6 | Oct 22 |
| Severe (24°F) | Sep 30 | Oct 17 | Nov 2 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 4 | Sep 7 | Sep 11 | Sep 14 | Sep 17 | Sep 20 | Sep 22 | Sep 25 | Sep 28 |
| 32°F | Sep 12 | Sep 17 | Sep 20 | Sep 23 | Sep 26 | Sep 28 | Sep 30 | Oct 4 | Oct 9 |
| 28°F | Sep 22 | Sep 26 | Sep 29 | Oct 3 | Oct 6 | Oct 10 | Oct 13 | Oct 18 | Oct 22 |
| 24°F | Sep 30 | Oct 6 | Oct 10 | Oct 14 | Oct 17 | Oct 21 | Oct 24 | Oct 28 | Nov 2 |
| 20°F | Oct 10 | Oct 16 | Oct 20 | Oct 24 | Oct 27 | Nov 1 | Nov 3 | Nov 7 | Nov 12 |
| 16°F | Oct 20 | Oct 25 | Oct 31 | Nov 3 | Nov 7 | Nov 10 | Nov 14 | Nov 17 | Nov 22 |
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: Salina 24 E, Ut, about 14.5 miles away@if(!empty($station['elevation_ft'])), at 7,560 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 Salina, UT?
On average, the last spring frost (32°F) around Salina, UT is about May 29. In cooler years it can run later, so for a safer bet many gardeners wait until May 12.
When is the first frost in the fall?
The first fall frost around Salina, UT typically arrives about Sep 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 May 29 on average, or May 12 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 118 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 84654 Planting calendar → Utah frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026