Frost Dates for Yuma, AZ 85364
Last spring frost February 23 · First fall frost December 20 · 300 frost-free days · USDA Zone 10a
Frost probability for 85364
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | March 1 | February 23 | January 23 |
| Fall (first frost) | November 25 | December 20 | January 15 |
Dates come from NOAA 1971–2000 freeze probabilities at the nearest reporting station (69.0 km away); the 50% date is the median year.
Frost dates by ZIP code in Yuma, AZ
| ZIP | Last spring frost (50%) | First fall frost (50%) | Zone |
|---|---|---|---|
| 85364 | February 23 | December 20 | 10a |
| 85365 | February 23 | November 22 | 9a |
| 85367 | February 23 | December 20 | 10a |
Month by month in Yuma
| Month | What to do |
|---|---|
| January | Start herbs, basil, and squash indoors (4–6 weeks before frost). Direct sow peas, spinach, and lettuce if soil is workable. |
| February | Last frost around February 23. Transplant cold-hardy crops (broccoli, kale, cabbage). Harden off tomato and pepper seedlings. |
| March | Frost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini. |
| April | Succession plant lettuce and greens. Keep beds weeded and watered consistently. |
| May | Harvest regularly to encourage production. Monitor for pests and disease. |
| June | Midsummer: harvest beans, zucchini, cucumbers. Start brassica seeds indoors for fall. |
| July | Direct sow carrots and beets for fall harvest. Start fall broccoli and kale indoors. |
| August | Direct sow carrots and beets for fall harvest. Start fall broccoli and kale indoors. |
| September | Direct sow carrots and beets for fall harvest. Start fall broccoli and kale indoors. |
| October | Direct sow carrots and beets for fall harvest. Start fall broccoli and kale indoors. |
| November | First fall frost approaching (around December 20). Transplant fall brassicas. Sow spinach, arugula, and radishes. |
| December | First frost around December 20. Harvest tomatoes and peppers before frost. Cover cold-hardy crops with row covers to extend the season. |
What grows in a 300-day season
Frequently Asked Questions
What is the last frost date for Yuma, AZ (ZIP 85364)?
The median last spring frost date for Yuma, AZ (ZIP code 85364) is around February 23. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area.
What is the first fall frost date in Yuma, AZ?
The median first fall frost date for Yuma, AZ is around December 20. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses.
How long is the growing season in Yuma, AZ?
The frost-free growing season in Yuma is about 300 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side.
What USDA hardiness zone is Yuma, AZ?
Based on frost date patterns, Yuma falls approximately in 10a. USDA hardiness zones are determined by average annual minimum winter temperatures and guide both plant selection and planting timing for your location.
When should I start tomatoes indoors in Yuma, AZ?
Start tomato seeds indoors 6–8 weeks before your last frost date (around February 23). For Yuma, that's roughly December 29 to January 12. Transplant outdoors 1–2 weeks after your last frost.
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