Moreno Valley, CA 92551 Frost Dates
When can you plant in Moreno Valley, CA?
Around 01/10 is the usual last spring frost, about 135 days away. The first fall frost typically arrives around 01/02, about 365 frost-free days later.
The USDA Plant Hardiness Zone Map puts Moreno Valley in Zone 9b (25 to 30°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 18 weeks of growing season left in Moreno Valley before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 01/10 isn't a guarantee
01/10 is the middle of 30 years of NOAA records, not a promise. Plant by 02/17 and you're betting against frost in roughly 9 years out of 10. 12/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Moreno Valley compares
At roughly 365 frost-free days, Moreno Valley places 351 of 40,283 ZIP codes in this dataset. Within CA, it ranks 114 of 2,555.
Learn more
the frost range covers how to read the range around Moreno Valley's dates instead of trusting one. local microclimates covers what one yard in Moreno Valley can differ from the 92551 normal.