Jurupa Valley, CA 91752 Frost Dates
91752, near Jurupa Valley, CA: the frost window
Around 01/04 is the usual last spring frost, about 129 days away. Fall's first freeze usually shows up around 12/30, roughly 365 days after the last spring frost.
Zone 10a (30 to 35°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Jurupa Valley, not a forecast for this year.
Stretching the season past the first frost
Jurupa Valley's growing season runs out in roughly 18 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
01/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/14 and only about 1 year in 10 sees frost after that.
Jurupa Valley against the rest of the dataset
At roughly 365 frost-free days, Jurupa Valley places 481 of 40,283 ZIP codes in this dataset. Within CA, it ranks 197 of 2,555.
Learn more
Two guides worth reading on 91752: the frost range, on how to read the range around Jurupa Valley's dates instead of trusting one, and local microclimates, on what one yard in Jurupa Valley can differ from the 91752 normal.