Frost dates for Brighton, UT
When the last spring frost and first fall frost usually come, and when to plant, from 30 years of NOAA weather records.
Last spring frost
June 11
typical year
Safe to plant
June 27
frost is over in 9 of 10 years
First fall frost
September 18
typical year
Growing season
98 days
frost-free, typical year
Frost watch this week
Tonight's and the next six nights' lows from the National Weather Service forecast for the station's location. Frost: 32°F or colder. Possible frost: 33–36°F, mostly in low spots on clear, still nights.
When to plant
Counted from this page's frost dates. Warm-season crops wait for the safe-to-plant date.
| Crop | Start indoors | Plant outside | Fall planting |
|---|---|---|---|
| Cool-season crops | |||
| Peas | – | May 14 – 28 | – |
| Spinach | – | Apr 30 – May 21 | Jul 24 – Aug 7 |
| Lettuce | – | May 14 – Jun 4 | Jul 24 – Aug 7 |
| Radishes | – | May 14 – Jun 25 | Aug 7 – 21 |
| Onions | – | May 14 – 28 | – |
| Potatoes | Season usually too short. Try a quick variety or row covers. | ||
| Carrots | – | May 21 – Jun 11 | Jun 26 – Jul 10 |
| Beets | – | May 14 – 28 | Jul 10 – 24 |
| Kale | Apr 2 – 16 | May 14 – 28 | Jul 10 – 24 |
| Broccoli | Apr 2 – 16 | May 28 – Jun 11 | Jul 10 – 24 |
| Cabbage | Mar 19 – Apr 2 | May 14 – 28 | Jul 10 – 24 |
| Garlic | – | – | Aug 7 – 28 |
| Warm-season crops | |||
| Tomatoes | May 2 – 16 | Jun 27 – Jul 11 | – |
| Peppers | Apr 25 – May 9 | Jul 4 – 18 | – |
| Cucumbers | – | Jun 27 – Jul 18 | – |
| Zucchini | – | Jun 27 – Jul 25 | – |
| Pumpkins | Season usually too short. Try a quick variety or row covers. | ||
| Green beans | – | Jun 27 – Jul 10 | – |
| Sweet corn | Season usually too short. Try a quick variety or row covers. | ||
| Basil | May 23 – Jun 6 | Jul 4 – 11 | – |
Onions: from sets. Green beans: until 10 weeks before the first fall frost. Garlic: harvest next summer.
The year at a glance
Start indoors Plant outside Fall planting
The chance of frost, by date
| 1 year in 10 | Half of years | 9 years in 10 | |
|---|---|---|---|
| Spring frost after | June 27 | June 11 | May 26 |
| Fall frost before | September 3 | September 18 | September 29 |
Frost here means 32°F or colder. Read across: in 1 year in 10, spring frost carries on past the first date, which is why that date is the safe-to-plant date.
Hard freeze (28°F)
A hard freeze kills most garden plants, even hardy ones. The last one in spring usually comes around June 1 (June 18 in a late year), and the first one in fall around September 27.
Towns that use these dates
This is the nearest NOAA station with frost records for 2 towns.
Brighton, Alta
Where these dates come from
NOAA weather station ALTA, UT US (USC00420072), 1991–2020 climate normals. It's the nearest station for 2 zip codes, all within 5 miles:
84092, 84121
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.