Frost dates for 85131Eloy, AZ
The average last spring frost in Eloy is February 24 and the average first fall frost is November 28, giving a typical growing season of about 273 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Feb 24
- Average first fall frost
- Nov 28
- Growing season
- 273 days
Safer after Mar 18 (1-in-10 risk)
Possible by Nov 11 (1-in-10 risk)
First frost typically in 32 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 25 · Mar 17 · Apr 11 | Oct 30 · Nov 17 · Dec 1 | 240 days | 100% |
| Frost / freeze (32°F) | Jan 30 · Feb 24 · Mar 18 | Nov 11 · Nov 28 · Dec 13 | 273 days | 100% |
| Hard freeze (28°F) | Jan 5 · Feb 3 · Feb 28 | Nov 23 · Dec 8 · Jan 1 | 308 days | 99% |
Planting calendar for Eloy
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 24 – Apr 1 |
| Tomatoes | Transplant outdoors | Mar 12 – Aug 8 |
| Peppers | Start seeds indoors | Jan 24 – Feb 24 |
| Peppers | Transplant outdoors | Mar 26 – Apr 26 |
| Eggplant | Start seeds indoors | Feb 10 – Mar 11 |
| Eggplant | Transplant outdoors | Mar 26 – Apr 26 |
| Cucumbers | Sow outdoors | Mar 26 – Aug 18 |
| Summer squash | Sow outdoors | Mar 12 – Apr 26 |
| Winter squash & pumpkins | Sow outdoors | Mar 26 – Apr 26 |
| Snap beans | Sow outdoors | Mar 12 – Sep 10 |
| Sweet corn | Sow outdoors | Mar 12 – Aug 8 |
| Watermelon & cantaloupe | Sow outdoors | Mar 26 – Apr 26 |
| Okra | Sow outdoors | Mar 19 – Apr 11 |
| Peas | Sow outdoors (spring) | Jan 24 – Mar 11 |
| Potatoes | Plant outdoors (spring) | Jan 24 – Mar 26 |
| Onions | Start seeds indoors (spring) | Dec 13 – Jan 9 |
| Onions | Transplant outdoors (spring) | Feb 10 – Mar 11 |
| Broccoli | Start seeds indoors (spring) | Jan 6 – Feb 9 |
| Broccoli | Transplant outdoors (spring) | Feb 10 – Mar 11 |
| Broccoli | Start seeds indoors (fall) | Jul 29 – Aug 8 |
| Broccoli | Transplant outdoors (fall) | Aug 28 – Sep 8 |
| Cabbage | Start seeds indoors (spring) | Dec 27 – Jan 24 |
| Cabbage | Transplant outdoors (spring) | Jan 24 – Feb 24 |
| Cabbage | Start seeds indoors (fall) | Jul 19 – Aug 18 |
| Cabbage | Transplant outdoors (fall) | Aug 18 – Sep 18 |
| Leaf lettuce | Sow outdoors (spring) | Jan 24 – Apr 11 |
| Leaf lettuce | Sow outdoors (fall) | Aug 18 – Oct 4 |
| Spinach | Sow outdoors (spring) | Jan 17 – Mar 2 |
| Spinach | Sow outdoors (fall) | Sep 4 – Oct 9 |
| Radishes | Sow outdoors (spring) | Jan 24 – Mar 16 |
| Radishes | Sow outdoors (fall) | Aug 18 – Oct 19 |
| Kale | Sow outdoors (spring) | Feb 10 – Mar 2 |
| Kale | Sow outdoors (fall) | Aug 11 – Sep 18 |
| Carrots | Sow outdoors (spring) | Feb 24 – Apr 11 |
| Carrots | Sow outdoors (fall) | Jul 19 – Sep 3 |
| Garlic | Plant outdoors (fall) | Nov 18 – Dec 19 |
Where these dates come from
ZIP code 85131 is matched to the NOAA station Eloy 4 Ne, AZ, 7 km away, at 1,545 ft elevation (0 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Eloy 4 Ne, AZ (used) | 1,545 ft | Feb 24 | Nov 28 |
| Robson Rch, AZ | 1,495 ft | Feb 7 | Dec 3 |
| Arizona City, AZ | 1,525 ft | Feb 28 | Nov 21 |
| Casa Grande, AZ | 1,400 ft | Feb 5 | Dec 6 |
Frost dates near Eloy
- Arizona City, AZ 85123 · last Feb 28, first Nov 21
- Casa Grande, AZ 85130 · last Feb 5, first Dec 6
- Picacho, AZ 85141 · last Feb 6, first Dec 9
- Coolidge, AZ 85128 · last Feb 17, first Nov 29
- Valley Farms, AZ 85191 · last Feb 17, first Nov 29
- Red Rock, AZ 85145 · last Feb 6, first Dec 9
- Florence, AZ 85132 · last Feb 17, first Nov 29
- Stanfield, AZ 85172 · last Feb 5, first Dec 6
Frequently asked questions
- When is the last frost in Eloy, AZ?
- For ZIP code 85131, the average last spring frost (32°F) is February 24, based on NOAA 1991-2020 climate normals for the Eloy 4 Ne, AZ weather station. There is a 1-in-10 chance of a frost after March 18.
- When is the first frost in Eloy, AZ?
- The average first fall frost (32°F) is November 28. There is a 1-in-10 chance of frost by November 11, so tender plants are at risk from that point on.
- How long is the growing season in 85131?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 273 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.