Frost Dates for Sahuarita, AZ
In Sahuarita, AZ, the average last spring frost is around Feb 25 and the average first fall frost around Nov 27, for a growing season of about 276 days. For frost-tender plants, wait until Mar 18, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Green Valley, AZ weather station, 3 miles away, elevation 2,900 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% | Mar 18 | Nov 12 |
| 20% | Mar 9 | Nov 17 |
| 30% | Mar 4 | Nov 20 |
| 40% | Feb 28 | Nov 24 |
| 50% | Feb 25 | Nov 27 |
| 60% | Feb 19 | Dec 1 |
| 70% | Feb 13 | Dec 4 |
| 80% | Feb 7 | Dec 7 |
| 90% | Jan 31 | Dec 13 |
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) | Mar 15 | Nov 16 |
| Frost / freeze (32°F) | Feb 25 | Nov 27 |
| Hard freeze (28°F) | Feb 1 | Dec 10 |
Planting calendar for Sahuarita
Transplant Mar 4 – Mar 18
Transplant Mar 11 – Mar 25
Transplant Mar 11 – Mar 25
Transplant Mar 4 – Mar 18
Sow or transplant Mar 4 – Mar 18
Sow or transplant Mar 4 – Mar 18
Sow or transplant Mar 11 – Mar 25
Sow or transplant Jan 28 – Feb 11
Fall sowing Oct 2 – Oct 30
Fall sowing Oct 2 – Oct 23
Fall sowing Sep 18 – Oct 2
Sow or transplant Jan 28 – Feb 11
Fall sowing Sep 18 – Oct 16
Transplant Feb 11 – Feb 25
Fall sowing Sep 4 – Sep 18
Transplant Feb 4 – Feb 18
Fall sowing Sep 4 – Sep 18
Fall sowing Sep 4 – Sep 18
Fall sowing Oct 16 – Nov 6
Fall sowing Sep 18 – Oct 2
Plant Jan 28 – Feb 11
Based on the average last frost (Feb 25) and first frost (Nov 27). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.