Red Bluff, CA 96063 Frost Dates
96063, near Red Bluff, CA: the frost window
Around 06/09 is the usual last spring frost, about 285 days away. Fall's first freeze usually shows up around 09/21, roughly 102 days after the last spring frost.
Red Bluff sits in USDA Zone 7b (5 to 10°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
Red Bluff's growing season runs out in roughly 3 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Red Bluff's last frost
06/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/27 and only about 1 year in 10 sees frost after that.
Red Bluff against the rest of the dataset
About 102 days separate Red Bluff's last and first frost, putting it 39,637 of 40,283 ZIP codes nationally. Within CA, it ranks 2,511 of 2,555.
Learn more
Two guides worth reading on 96063: zone vs. frost date, on why Zone 7b and Red Bluff's frost date answer different questions, and the frost range, on how to read the range around Red Bluff's dates instead of trusting one.