Fairfax, VA 22034 Frost Dates
22034, near Fairfax, VA: the frost window
Around 04/14 is the usual last spring frost, about 229 days away. Fall's first freeze usually shows up around 10/29, roughly 198 days after the last spring frost.
Fairfax 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
Fairfax's growing season runs out in roughly 9 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 Fairfax's last frost
04/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/28 and only about 1 year in 10 sees frost after that.
Fairfax against the rest of the dataset
About 198 days separate Fairfax's last and first frost, putting it 18,325 of 40,283 ZIP codes nationally. Within VA, it ranks 665 of 1,178.
Learn more
Two guides worth reading on 22034: local microclimates, on what one yard in Fairfax can differ from the 22034 normal, and zone vs. frost date, on why Zone 7b and Fairfax's frost date answer different questions.