San Luis, AZ frost dates
Last spring frostRaremost years have none
First fall frostRaremost years have none
Hardiness zone10aZone 10a
Gardening where frost is rare
San Luis, AZ rarely or never drops to freezing, 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.
How San Luis compares
- San Luis shares its weather station with Yuma, AZ, 30 km away, so the two have the same frost dates.
About these dates
Based on 1991–2020 NOAA climate normals for the Yuma Mcas, AZ weather station, 24 km away (elevation 213 ft (65 m)).
Frost dates near San Luis
- Gadsden rare frost
- Somerton rare frost
- Yuma rare frost
- Wellton Jan 11 · Dec 21
- Tacna Feb 13 · Dec 1
- Roll Feb 13 · Dec 1
- Cibola Jan 25 · Dec 12
- Ehrenberg Jan 4 · Dec 19
- Dateland Jan 25 · Dec 13
- Quartzsite Jan 28 · Dec 6
Frequently asked questions
When is the last frost in San Luis, AZ?
In most years San Luis, AZ has no frost at all. The nearest NOAA station averages 0 nights a year at or below 32°F — too few to calculate a typical frost date.