Rancho Mirage, CA 92270 Frost Dates
92270, near Rancho Mirage, CA: the frost window
Around 01/09 is the usual last spring frost, about 134 days away. Fall's first freeze usually shows up around 01/09, roughly 365 days after the last spring frost.
Rancho Mirage sits in USDA Zone 10a (30 to 35°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.
Protecting what you plant early
About 19 weeks to go until the last frost in Rancho Mirage — anything tender already in the ground is still at risk until that date passes, which is what frost cloth is for.
The actual range around Rancho Mirage's last frost
01/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/29 and only about 1 year in 10 sees frost after that.
Rancho Mirage against the rest of the dataset
About 365 days separate Rancho Mirage's last and first frost, putting it 1,498 of 40,283 ZIP codes nationally. Within CA, it ranks 775 of 2,555.
Learn more
Two guides worth reading on 92270: local microclimates, on what one yard in Rancho Mirage can differ from the 92270 normal, and zone vs. frost date, on why Zone 10a and Rancho Mirage's frost date answer different questions.