Frost Dates for Eagle Mountain, UT
In Eagle Mountain, UT, the average last spring frost is around Jun 2 and the average first fall frost around Sep 16, for a growing season of about 103 days. For frost-tender plants, wait until Jun 24, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Fairfield, UT weather station, 5 miles away, elevation 4,880 ft. Frost can come earlier in low spots and valleys and later near cities and large lakes.
Frost probability by date
Chance of a 32°F frost after the spring date, or before the fall date.
| Chance | Last spring frost | First fall frost |
|---|---|---|
| 10% | Jun 24 | Sep 1 |
| 20% | Jun 17 | Sep 6 |
| 30% | Jun 11 | Sep 10 |
| 40% | Jun 7 | Sep 13 |
| 50% | Jun 2 | Sep 16 |
| 60% | May 31 | Sep 18 |
| 70% | May 28 | Sep 21 |
| 80% | May 23 | Sep 24 |
| 90% | May 18 | Sep 29 |
Light frost vs. hard freeze
Average (50%) dates for each temperature. Tender plants are damaged at 36°F; most hardy crops survive until 28°F.
| Temperature | Last in spring | First in fall |
|---|---|---|
| Light frost (36°F) | — | — |
| Frost / freeze (32°F) | Jun 2 | Sep 16 |
| Hard freeze (28°F) | May 19 | Sep 26 |
Planting calendar for Eagle Mountain
Transplant Jun 9 – Jun 23
Transplant Jun 16 – Jun 30
Transplant Jun 16 – Jun 30
Transplant Jun 9 – Jun 23
Sow or transplant Jun 9 – Jun 23
Sow or transplant Jun 9 – Jun 23
Sow or transplant Jun 16 – Jun 30
Sow or transplant May 5 – May 19
Fall sowing Jul 22 – Aug 19
Fall sowing Jul 22 – Aug 12
Fall sowing Jul 8 – Jul 22
Sow or transplant May 5 – May 19
Fall sowing Jul 8 – Aug 5
Transplant May 19 – Jun 2
Fall sowing Jun 24 – Jul 8
Transplant May 12 – May 26
Fall sowing Jun 24 – Jul 8
Fall sowing Jun 24 – Jul 8
Fall sowing Aug 5 – Aug 26
Fall sowing Jul 8 – Jul 22
Plant May 5 – May 19
Based on the average last frost (Jun 2) and first frost (Sep 16). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.