Eureka, MO 63025 Frost Dates
Eureka, MO: when does the frost end?
Typically, the last spring freeze lands around 04/12, roughly 227 days out. Fall's first freeze usually shows up around 10/23, roughly 193 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Eureka in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 8 weeks until Eureka's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/12 isn't a guarantee
04/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/27 and only about 1 year in 10 sees frost after that.
Eureka against the rest of the dataset
Eureka's growing season runs about 193 days, ranking 19,763 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 665 of 1,129.
Learn more
Before leaning on 63025's figures: zone vs. frost date explains why Zone 6b and Eureka's frost date answer different questions, while the frost range explains how to read the range around Eureka's dates instead of trusting one.