Atwater, CA 95388 Frost Dates
Atwater, CA: when does the frost end?
The last spring frost here typically falls around 03/03, about 187 days from today. Fall's first freeze usually shows up around 11/24, roughly 263 days after the last spring frost.
Zone 9b (25 to 30°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 Atwater, not a forecast for this year.
Stretching the season past the first frost
With roughly 13 weeks until Atwater's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Atwater's last frost
03/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/10 and only about 1 year in 10 sees frost after that.
Atwater against the rest of the dataset
Atwater's growing season runs about 263 days, ranking 6,097 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 2,019 of 2,555.
Learn more
Before leaning on 95388's figures: local microclimates explains what one yard in Atwater can differ from the 95388 normal, while zone vs. frost date explains why Zone 9b and Atwater's frost date answer different questions.