Frost Dates for Bullhead City, AZ
In Bullhead City, AZ, the average last spring frost is around Jan 4 and the average first fall frost around Dec 23, for a growing season of about 356 days. For frost-tender plants, wait until Feb 5, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Bullhead City, AZ weather station, 1 mile away, elevation 531 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% | Feb 5 | Dec 1 |
| 20% | Jan 26 | Dec 8 |
| 30% | Jan 15 | Dec 13 |
| 40% | Jan 9 | Dec 18 |
| 50% | Jan 4 | Dec 23 |
| 60% | Dec 31 | Dec 27 |
| 70% | Dec 27 | Jan 1 |
| 80% | Dec 20 | Jan 9 |
| 90% | Dec 12 | Jan 23 |
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) | Feb 1 | Dec 11 |
| Frost / freeze (32°F) | Jan 4 | Dec 23 |
| Hard freeze (28°F) | Dec 26 | Dec 25 |
Planting calendar for Bullhead City
Transplant Jan 11 – Jan 25
Transplant Jan 18 – Feb 1
Transplant Jan 18 – Feb 1
Transplant Jan 11 – Jan 25
Sow or transplant Jan 11 – Jan 25
Sow or transplant Jan 11 – Jan 25
Sow or transplant Jan 18 – Feb 1
Sow or transplant Dec 7 – Dec 21
Fall sowing Oct 28 – Nov 25
Fall sowing Oct 28 – Nov 18
Fall sowing Oct 14 – Oct 28
Sow or transplant Dec 7 – Dec 21
Fall sowing Oct 14 – Nov 11
Transplant Dec 21 – Jan 4
Fall sowing Sep 30 – Oct 14
Transplant Dec 14 – Dec 28
Fall sowing Sep 30 – Oct 14
Fall sowing Sep 30 – Oct 14
Fall sowing Nov 11 – Dec 2
Fall sowing Oct 14 – Oct 28
Plant Dec 7 – Dec 21
Based on the average last frost (Jan 4) and first frost (Dec 23). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.