Wellton, AZ frost dates
Frost is light and occasional here — typically a few cold nights around midwinter (about 5 a year). Cover tender plants when frost is forecast.
How Wellton compares
- In a typical year, frost nights in Wellton fall between December 21 and January 11. In 1 year in 10 the first frost comes as early as December 1, or the last frost as late as February 14.
- Nearby Yuma, AZ, 38 km away, rarely gets frost, a reminder of how much elevation and distance from the coast matter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | December 17 |
| 50% (median) | January 11 |
| 10% (safe for tender plants) | February 14 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | December 1 |
| 50% (median) | December 21 |
| 90% (late) | January 25 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Gardening where frost is rare
Wellton, AZ only freezes on a few winter nights, so the usual "plant after the last frost" rule doesn't apply. Heat and rainfall decide the seasons instead:
- Cool-season crops (lettuce, broccoli, peas, carrots) grow best from fall through late winter.
- Warm-season crops (tomatoes, peppers, beans, squash) do best planted in late winter to spring, and again in late summer for a fall crop — midsummer heat can stop tomatoes setting fruit.
- Heat lovers (okra, sweet potatoes, melons) can be planted through spring and early summer.
About these dates
Based on 1991–2020 NOAA climate normals for the Yuma 27 Ene, AZ weather station, 16 km away (elevation 620 ft (189 m)).
Frost dates near Wellton
- Tacna Feb 13 · Dec 1
- Roll Feb 13 · Dec 1
- Yuma rare frost
- Somerton rare frost
- Gadsden rare frost
- San Luis rare frost
- Dateland Jan 25 · Dec 13
- Cibola Jan 25 · Dec 12
- Ehrenberg Jan 4 · Dec 19
- Quartzsite Jan 28 · Dec 6
Frequently asked questions
When is the last frost in Wellton, AZ?
The median last spring frost in Wellton, AZ is January 11. There is still about a 10% chance of frost after February 14, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Wellton, AZ?
The median first fall frost is December 21, with about a 10% chance of frost before December 1.
How long is the growing season in Wellton, AZ?
About 344 days between the median last spring frost and first fall frost.
What planting zone is Wellton, AZ?
Wellton, AZ is in USDA hardiness zone 9b.