Last frost date in San Luis, AZ
San Luis has no freeze in a typical year. The nearest NOAA station, Yuma Mcas, records 32°F in fewer than half of winters, so there is no average last frost date to plan around.
- Frost-free season
- Year-round
- Weather station
- 12.9 mi away
No frost in the next 6 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2259°
- FriOct 2360°
- SatOct 2462°
- SunOct 2563°
- MonOct 2663°
- TueOct 2764°
Planting without a frost date
Frost-based calendars do not work well here. In mild-winter places the limit is summer heat, not cold: tomatoes and peppers stop setting fruit when nights stay above the mid 70s, and lettuce bolts.
The usual pattern is two seasons. Warm-season crops go in late winter and again in late summer, and cool-season crops like lettuce, broccoli and carrots grow through fall and winter. Your county extension office publishes a local calendar.
Frost probabilities
The station records no 32°F night in at least half of years, so NOAA publishes no frost dates for it.
Where these numbers come from
NOAA station Yuma Mcas (USW00003145) sits 12.9 miles from the center of San Luis at 213 feet. Its averages cover 1991 to 2020. Low spots, valleys and open fields can keep getting frost a week or two after the station stops; city centers and lakeshores usually get less of it.
Questions
Does San Luis get frost?
Rarely. The nearest NOAA station records a 32°F night in fewer than half of years, so most winters pass without a freeze.
When should I plant tomatoes in San Luis?
Without a frost date to work from, timing follows heat instead of cold. Spring and fall are the usual tomato seasons; midsummer heat stops fruit from setting.
Nearby in Arizona
- Yumano frost
- Fortuna FoothillsJan 4
- Lake Havasu CityJan 5
- GoodyearJan 14
- AvondaleJan 14
- El MirageJan 20
- Sun CityJan 20
- MaricopaFeb 23
- GlendaleJan 20
- PhoenixJan 8
- TempeFeb 13
- Casa GrandeFeb 5