Last spring frost
Jun 13
Frost Dates for Fairview, UT
First fall frost
Sep 17
Growing season
94 days
Hardiness zone
5b
In an average year around Fairview, UT, the last spring frost (32°F) is about Jun 13 and the first fall frost is about Sep 17, giving roughly a 94-day growing season. To be safe most years, wait until May 29 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%) |
|---|---|---|---|
| Freeze (32°F) | Jun 30 | Jun 13 | May 29 |
| Hard (28°F) | Jun 21 | Jun 1 | May 12 |
| Severe (24°F) | Jun 10 | May 15 | May 1 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 32°F | Jun 30 | Jun 24 | Jun 21 | Jun 17 | Jun 13 | Jun 10 | Jun 6 | Jun 3 | May 29 |
| 28°F | Jun 21 | Jun 15 | Jun 8 | Jun 5 | Jun 1 | May 28 | May 23 | May 18 | May 12 |
| 24°F | Jun 10 | Jun 1 | May 24 | May 19 | May 15 | May 11 | May 8 | May 5 | May 1 |
| 20°F | May 23 | May 13 | May 8 | May 5 | May 2 | Apr 29 | Apr 25 | Apr 22 | Apr 17 |
| 16°F | May 6 | May 1 | Apr 27 | Apr 23 | Apr 19 | Apr 17 | Apr 13 | Apr 9 | Apr 3 |
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%) |
|---|---|---|---|
| Freeze (32°F) | Sep 1 | Sep 17 | Sep 28 |
| Hard (28°F) | Sep 9 | Sep 26 | Oct 10 |
| Severe (24°F) | Sep 21 | Oct 5 | Oct 22 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 32°F | Sep 1 | Sep 7 | Sep 11 | Sep 15 | Sep 17 | Sep 20 | Sep 23 | Sep 25 | Sep 28 |
| 28°F | Sep 9 | Sep 16 | Sep 21 | Sep 23 | Sep 26 | Sep 28 | Oct 1 | Oct 4 | Oct 10 |
| 24°F | Sep 21 | Sep 26 | Sep 29 | Oct 2 | Oct 5 | Oct 9 | Oct 13 | Oct 17 | Oct 22 |
| 20°F | Sep 30 | Oct 5 | Oct 10 | Oct 14 | Oct 18 | Oct 21 | Oct 24 | Oct 27 | Nov 2 |
| 16°F | Oct 11 | Oct 18 | Oct 22 | Oct 25 | Oct 27 | Oct 31 | Nov 3 | Nov 7 | Nov 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: Scofield-Skyline Mine, Ut, about 14.3 miles away@if(!empty($station['elevation_ft'])), at 8,697 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 Fairview, UT?
On average, the last spring frost (32°F) around Fairview, UT is about Jun 13. In cooler years it can run later, so for a safer bet many gardeners wait until May 29.
When is the first frost in the fall?
The first fall frost around Fairview, UT typically arrives about Sep 17. 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 Jun 13 on average, or May 29 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 94 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 84629 Planting calendar → Utah frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026