Altenburg, MO 63732 Frost Dates
Altenburg, MO: when does the frost end?
Typically, the last spring freeze lands around 04/07, roughly 222 days out. Fall's first freeze usually shows up around 10/29, roughly 202 days after the last spring frost.
Altenburg 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 Altenburg's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/07 isn't a guarantee
04/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/22 and only about 1 year in 10 sees frost after that.
Altenburg against the rest of the dataset
At roughly 202 frost-free days, Altenburg places 17,346 of 40,283 ZIP codes in this dataset. Within MO, it ranks 349 of 1,129.
Learn more
Before leaning on 63732's figures: local microclimates explains what one yard in Altenburg can differ from the 63732 normal, while zone vs. frost date explains why Zone 7a and Altenburg's frost date answer different questions.