Susanville, CA 96121 Frost Dates
Susanville, CA: when does the frost end?
Around 05/21 is the usual last spring frost, about 266 days away. Fall's first freeze usually shows up around 10/01, roughly 130 days after the last spring frost.
Susanville sits in USDA Zone 7a (0 to 5°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 5 weeks until Susanville'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
05/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/11 and only about 1 year in 10 sees frost after that.
Susanville against the rest of the dataset
At roughly 130 frost-free days, Susanville places 38,362 of 40,283 ZIP codes in this dataset. Within CA, it ranks 2,467 of 2,555.
Learn more
Before leaning on 96121's figures: the frost range explains how to read the range around Susanville's dates instead of trusting one, while local microclimates explains what one yard in Susanville can differ from the 96121 normal.