Crystal Lake Park, MO 63131 Frost Dates
Crystal Lake Park, MO: when does the frost end?
Typically, the last spring freeze lands around 04/04, roughly 219 days out. Fall's first freeze usually shows up around 10/29, roughly 206 days after the last spring frost.
Crystal Lake Park 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 9 weeks until Crystal Lake Park's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/04 isn't a guarantee
04/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/21 and only about 1 year in 10 sees frost after that.
Crystal Lake Park against the rest of the dataset
At roughly 206 frost-free days, Crystal Lake Park places 16,096 of 40,283 ZIP codes in this dataset. Within MO, it ranks 233 of 1,129.
Learn more
Before leaning on 63131's figures: the frost range explains how to read the range around Crystal Lake Park's dates instead of trusting one, while local microclimates explains what one yard in Crystal Lake Park can differ from the 63131 normal.