Last spring frost
Jun 11
Frost Dates for Glendale, UT
First fall frost
Oct 3
Growing season
113 days
Hardiness zone
6a
In an average year around Glendale, UT, the last spring frost (32°F) is about Jun 11 and the first fall frost is about Oct 3, giving roughly a 113-day growing season. To be safe most years, wait until May 15 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) | Jul 17 | Jun 24 | Jun 6 |
| Freeze (32°F) | Jun 27 | Jun 11 | May 15 |
| Hard (28°F) | Jun 16 | May 19 | Apr 29 |
| Severe (24°F) | May 31 | Apr 30 | Apr 15 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Jul 17 | Jul 7 | Jul 1 | Jun 28 | Jun 24 | Jun 21 | Jun 17 | Jun 13 | Jun 6 |
| 32°F | Jun 27 | Jun 21 | Jun 18 | Jun 14 | Jun 11 | Jun 7 | Jun 2 | May 26 | May 15 |
| 28°F | Jun 16 | Jun 9 | Jun 3 | May 29 | May 19 | May 13 | May 8 | May 3 | Apr 29 |
| 24°F | May 31 | May 14 | May 8 | May 3 | Apr 30 | Apr 27 | Apr 24 | Apr 20 | Apr 15 |
| 20°F | May 2 | Apr 27 | Apr 23 | Apr 19 | Apr 16 | Apr 13 | Apr 8 | Apr 3 | Mar 28 |
| 16°F | Apr 17 | Apr 10 | Apr 6 | Apr 1 | Mar 28 | Mar 23 | Mar 17 | Mar 11 | Mar 1 |
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 6 | Sep 22 | Oct 4 |
| Freeze (32°F) | Sep 18 | Oct 3 | Oct 16 |
| Hard (28°F) | Oct 1 | Oct 13 | Oct 28 |
| Severe (24°F) | Oct 7 | Oct 22 | Nov 12 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 6 | Sep 12 | Sep 16 | Sep 19 | Sep 22 | Sep 25 | Sep 27 | Oct 1 | Oct 4 |
| 32°F | Sep 18 | Sep 24 | Sep 28 | Oct 1 | Oct 3 | Oct 6 | Oct 8 | Oct 11 | Oct 16 |
| 28°F | Oct 1 | Oct 4 | Oct 7 | Oct 10 | Oct 13 | Oct 15 | Oct 18 | Oct 22 | Oct 28 |
| 24°F | Oct 7 | Oct 12 | Oct 16 | Oct 18 | Oct 22 | Oct 25 | Oct 29 | Nov 4 | Nov 12 |
| 20°F | Oct 15 | Oct 21 | Oct 25 | Oct 31 | Nov 5 | Nov 10 | Nov 14 | Nov 19 | Nov 23 |
| 16°F | Oct 23 | Nov 1 | Nov 10 | Nov 15 | Nov 19 | Nov 23 | Nov 27 | Dec 3 | Dec 10 |
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: Cedar Breaks Nm, Ut, about 9.5 miles away@if(!empty($station['elevation_ft'])), at 10,372 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 Glendale, UT?
On average, the last spring frost (32°F) around Glendale, UT is about Jun 11. In cooler years it can run later, so for a safer bet many gardeners wait until May 15.
When is the first frost in the fall?
The first fall frost around Glendale, UT typically arrives about Oct 3. 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 11 on average, or May 15 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 113 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 84762 Planting calendar → Utah frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026