Fairfax, MO 64446 Frost Dates
64446, near Fairfax, MO: the frost window
Around 04/19 is the usual last spring frost, about 234 days away. Fall's first freeze usually shows up around 10/15, roughly 177 days after the last spring frost.
Fairfax sits in USDA Zone 5b (-15 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 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/19 isn't a guarantee
04/19 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/04 and only about 1 year in 10 sees frost after that.
Fairfax against the rest of the dataset
Fairfax's growing season runs about 177 days, ranking 26,213 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 1,050 of 1,129.
Learn more
Two guides worth reading on 64446: the frost range, on how to read the range around Fairfax's dates instead of trusting one, and local microclimates, on what one yard in Fairfax can differ from the 64446 normal.