Hayward, CA 94541 Frost Dates
Hayward, CA: when does the frost end?
Around 01/02 is the usual last spring frost, about 127 days away. Fall's first freeze usually shows up around 12/25, roughly 365 days after the last spring frost.
Hayward 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.
Stretching the season past the first frost
With roughly 17 weeks until Hayward's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
01/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/13 and only about 1 year in 10 sees frost after that.
Hayward against the rest of the dataset
At roughly 365 frost-free days, Hayward places 387 of 40,283 ZIP codes in this dataset. Within CA, it ranks 138 of 2,555.
Learn more
Before leaning on 94541's figures: local microclimates explains what one yard in Hayward can differ from the 94541 normal, while zone vs. frost date explains why Zone 10a and Hayward's frost date answer different questions.