Frost Dates for Gilbert, AZ
In Gilbert, AZ, the average last spring frost is around Feb 1 and the average first fall frost around Dec 11, for a growing season of about 315 days. For frost-tender plants, wait until Feb 27, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Chandler Heights, AZ weather station, 8 miles away, elevation 1,425 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 27 | Nov 23 |
| 20% | Feb 18 | Nov 29 |
| 30% | Feb 12 | Dec 3 |
| 40% | Feb 5 | Dec 7 |
| 50% | Feb 1 | Dec 11 |
| 60% | Jan 24 | Dec 15 |
| 70% | Jan 17 | Dec 19 |
| 80% | Jan 8 | Dec 25 |
| 90% | Jan 2 | 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 21 | Nov 28 |
| Frost / freeze (32°F) | Feb 1 | Dec 11 |
| Hard freeze (28°F) | Jan 8 | Dec 26 |
Planting calendar for Gilbert
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 16 – Nov 13
Fall sowing Oct 16 – Nov 6
Fall sowing Oct 2 – Oct 16
Sow or transplant Jan 4 – Jan 18
Fall sowing Oct 2 – Oct 30
Transplant Jan 18 – Feb 1
Fall sowing Sep 18 – Oct 2
Transplant Jan 11 – Jan 25
Fall sowing Sep 18 – Oct 2
Fall sowing Sep 18 – Oct 2
Fall sowing Oct 30 – Nov 20
Fall sowing Oct 2 – Oct 16
Plant Jan 4 – Jan 18
Based on the average last frost (Feb 1) and first frost (Dec 11). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.