Frost Dates for Cedar City, UT
In Cedar City, UT, the average last spring frost is around May 4 and the average first fall frost around Oct 13, for a growing season of about 159 days. For frost-tender plants, wait until May 28, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Cedar City, UT weather station, 1 mile away, elevation 6,090 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% | May 28 | Sep 30 |
| 20% | May 19 | Oct 3 |
| 30% | May 14 | Oct 7 |
| 40% | May 9 | Oct 10 |
| 50% | May 4 | Oct 13 |
| 60% | Apr 30 | Oct 16 |
| 70% | Apr 28 | Oct 19 |
| 80% | Apr 24 | Oct 22 |
| 90% | Apr 19 | Oct 28 |
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) | May 20 | Oct 4 |
| Frost / freeze (32°F) | May 4 | Oct 13 |
| Hard freeze (28°F) | Apr 22 | Oct 23 |
Planting calendar for Cedar City
Transplant May 11 – May 25
Transplant May 18 – Jun 1
Transplant May 18 – Jun 1
Transplant May 11 – May 25
Sow or transplant May 11 – May 25
Sow or transplant May 11 – May 25
Sow or transplant May 18 – Jun 1
Sow or transplant Apr 6 – Apr 20
Fall sowing Aug 18 – Sep 15
Fall sowing Aug 18 – Sep 8
Fall sowing Aug 4 – Aug 18
Sow or transplant Apr 6 – Apr 20
Fall sowing Aug 4 – Sep 1
Transplant Apr 20 – May 4
Fall sowing Jul 21 – Aug 4
Transplant Apr 13 – Apr 27
Fall sowing Jul 21 – Aug 4
Fall sowing Jul 21 – Aug 4
Fall sowing Sep 1 – Sep 22
Fall sowing Aug 4 – Aug 18
Plant Apr 6 – Apr 20
Based on the average last frost (May 4) and first frost (Oct 13). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.