Frost Dates for Mesa, AZ
In Mesa, AZ, the average last spring frost is around Feb 1 and the average first fall frost around Dec 10, for a growing season of about 312 days. For frost-tender plants, wait until Feb 28, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the E Mesa, AZ weather station, 4 miles away, elevation 1,518 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 28 | Nov 22 |
| 20% | Feb 19 | Nov 28 |
| 30% | Feb 12 | Dec 2 |
| 40% | Feb 6 | Dec 6 |
| 50% | Feb 1 | Dec 10 |
| 60% | Jan 26 | Dec 14 |
| 70% | Jan 18 | Dec 19 |
| 80% | Jan 10 | Dec 24 |
| 90% | Jan 1 | Jan 1 |
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 27 | Nov 30 |
| Frost / freeze (32°F) | Feb 1 | Dec 10 |
| Hard freeze (28°F) | Jan 11 | Dec 26 |
Planting calendar for Mesa
Transplant Feb 8 – Feb 22
Transplant Feb 15 – Mar 1
Transplant Feb 15 – Mar 1
Transplant Feb 8 – Feb 22
Sow or transplant Feb 8 – Feb 22
Sow or transplant Feb 8 – Feb 22
Sow or transplant Feb 15 – Mar 1
Sow or transplant Jan 4 – Jan 18
Fall sowing Oct 15 – Nov 12
Fall sowing Oct 15 – Nov 5
Fall sowing Oct 1 – Oct 15
Sow or transplant Jan 4 – Jan 18
Fall sowing Oct 1 – Oct 29
Transplant Jan 18 – Feb 1
Fall sowing Sep 17 – Oct 1
Transplant Jan 11 – Jan 25
Fall sowing Sep 17 – Oct 1
Fall sowing Sep 17 – Oct 1
Fall sowing Oct 29 – Nov 19
Fall sowing Oct 1 – Oct 15
Plant Jan 4 – Jan 18
Based on the average last frost (Feb 1) and first frost (Dec 10). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.