Gridley, CA 95948 Frost Dates
Gridley, CA: when does the frost end?
Typically, the last spring freeze lands around 01/29, roughly 154 days out. Fall's first freeze usually shows up around 12/07, roughly 317 days after the last spring frost.
Gridley 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 14 weeks until Gridley's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 01/29 isn't a guarantee
01/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/28 and only about 1 year in 10 sees frost after that.
Gridley against the rest of the dataset
At roughly 317 frost-free days, Gridley places 3,379 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,408 of 2,555.
Learn more
Before leaning on 95948's figures: zone vs. frost date explains why Zone 9b and Gridley's frost date answer different questions, while the frost range explains how to read the range around Gridley's dates instead of trusting one.