Frost dates for 85629Sahuarita, AZ
The average last spring frost in Sahuarita is February 25 and the average first fall frost is November 27, giving a typical growing season of about 276 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Feb 25
- Average first fall frost
- Nov 27
- Growing season
- 276 days
Safer after Mar 18 (1-in-10 risk)
Possible by Nov 12 (1-in-10 risk)
First frost typically in 31 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | Feb 24 · Mar 15 · Apr 7 | Nov 1 · Nov 16 · Dec 2 | 243 days | 100% |
| Frost / freeze (32°F) | Jan 31 · Feb 25 · Mar 18 | Nov 12 · Nov 27 · Dec 13 | 276 days | 100% |
| Hard freeze (28°F) | Jan 2 · Feb 1 · Feb 27 | Nov 22 · Dec 10 · Jan 5 | 316 days | 99% |
Planting calendar for Sahuarita
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | Jan 25 – Apr 2 |
| Tomatoes | Transplant outdoors | Mar 13 – Aug 7 |
| Peppers | Start seeds indoors | Jan 25 – Feb 25 |
| Peppers | Transplant outdoors | Mar 27 – Apr 27 |
| Eggplant | Start seeds indoors | Feb 11 – Mar 12 |
| Eggplant | Transplant outdoors | Mar 27 – Apr 27 |
| Cucumbers | Sow outdoors | Mar 27 – Aug 17 |
| Summer squash | Sow outdoors | Mar 13 – Apr 27 |
| Winter squash & pumpkins | Sow outdoors | Mar 27 – Apr 27 |
| Snap beans | Sow outdoors | Mar 13 – Sep 9 |
| Sweet corn | Sow outdoors | Mar 13 – Aug 7 |
| Watermelon & cantaloupe | Sow outdoors | Mar 27 – Apr 27 |
| Okra | Sow outdoors | Mar 20 – Apr 12 |
| Peas | Sow outdoors (spring) | Jan 25 – Mar 12 |
| Potatoes | Plant outdoors (spring) | Jan 25 – Mar 27 |
| Onions | Start seeds indoors (spring) | Dec 14 – Jan 10 |
| Onions | Transplant outdoors (spring) | Feb 11 – Mar 12 |
| Broccoli | Start seeds indoors (spring) | Jan 7 – Feb 10 |
| Broccoli | Transplant outdoors (spring) | Feb 11 – Mar 12 |
| Broccoli | Start seeds indoors (fall) | Jul 28 – Aug 7 |
| Broccoli | Transplant outdoors (fall) | Aug 27 – Sep 7 |
| Cabbage | Start seeds indoors (spring) | Dec 28 – Jan 25 |
| Cabbage | Transplant outdoors (spring) | Jan 25 – Feb 25 |
| Cabbage | Start seeds indoors (fall) | Jul 18 – Aug 17 |
| Cabbage | Transplant outdoors (fall) | Aug 17 – Sep 17 |
| Leaf lettuce | Sow outdoors (spring) | Jan 25 – Apr 12 |
| Leaf lettuce | Sow outdoors (fall) | Aug 17 – Oct 3 |
| Spinach | Sow outdoors (spring) | Jan 18 – Mar 3 |
| Spinach | Sow outdoors (fall) | Sep 3 – Oct 8 |
| Radishes | Sow outdoors (spring) | Jan 25 – Mar 17 |
| Radishes | Sow outdoors (fall) | Aug 17 – Oct 18 |
| Kale | Sow outdoors (spring) | Feb 11 – Mar 3 |
| Kale | Sow outdoors (fall) | Aug 10 – Sep 17 |
| Carrots | Sow outdoors (spring) | Feb 25 – Apr 12 |
| Carrots | Sow outdoors (fall) | Jul 18 – Sep 2 |
| Garlic | Plant outdoors (fall) | Nov 17 – Dec 18 |
Where these dates come from
ZIP code 85629 is matched to the NOAA station Green Valley, AZ, 5.8 km away, at 2,900 ft elevation (168 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Green Valley, AZ (used) | 2,900 ft | Feb 25 | Nov 27 |
| Tucson Intl Ap, AZ | 2,549 ft | Feb 5 | Dec 9 |
| Santa Rita Exp Range, AZ | 4,300 ft | Feb 25 | Dec 5 |
| Tucson Wfo, AZ | 2,435 ft | Jan 20 | Dec 17 |
Frost dates near Sahuarita
- Green Valley, AZ 85614 · last Feb 25, first Nov 27
- Tucson, AZ 85734 · last Feb 5, first Dec 9
- Vail, AZ 85641 · last Jan 26, first Dec 16
- Amado, AZ 85645 · last Apr 5, first Nov 10
- Tubac, AZ 85646 · last Apr 5, first Nov 10
- Tumacacori, AZ 85640 · last Apr 5, first Nov 10
- Nogales, AZ 85628 · last Mar 20, first Nov 17
- Sonoita, AZ 85637 · last Apr 18, first Nov 1
Frequently asked questions
- When is the last frost in Sahuarita, AZ?
- For ZIP code 85629, the average last spring frost (32°F) is February 25, based on NOAA 1991-2020 climate normals for the Green Valley, AZ weather station. There is a 1-in-10 chance of a frost after March 18.
- When is the first frost in Sahuarita, AZ?
- The average first fall frost (32°F) is November 27. There is a 1-in-10 chance of frost by November 12, so tender plants are at risk from that point on.
- How long is the growing season in 85629?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 276 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.