Miami, AZ 85545 Frost Dates
Miami, AZ: when does the frost end?
The last spring frost here typically falls around 01/17, about 142 days from today. Fall's first freeze usually shows up around 12/25, roughly 342 days after the last spring frost.
Miami sits in USDA Zone 9b (25 to 30°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 17 weeks until Miami's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 01/17 isn't a guarantee
01/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/21 and only about 1 year in 10 sees frost after that.
Miami against the rest of the dataset
About 342 days separate Miami's last and first frost, putting it 2,559 of 40,283 ZIP codes nationally. Within AZ, it ranks 142 of 506.
Learn more
Before leaning on 85545's figures: local microclimates explains what one yard in Miami can differ from the 85545 normal, while zone vs. frost date explains why Zone 9b and Miami's frost date answer different questions.