Pleasant Hill, IA 50327 Frost Dates
Pleasant Hill, IA: when does the frost end?
Typically, the last spring freeze lands around 04/18, roughly 233 days out. Fall's first freeze usually shows up around 10/20, roughly 184 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Pleasant Hill in Zone 5b (-15 to -10°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 Pleasant Hill's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/18 isn't a guarantee
04/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/02 and only about 1 year in 10 sees frost after that.
Pleasant Hill against the rest of the dataset
Pleasant Hill's growing season runs about 184 days, ranking 23,464 of 40,283 US ZIP codes measured here, longest to shortest. Within IA, it ranks 61 of 1,042.
Learn more
Before leaning on 50327's figures: zone vs. frost date explains why Zone 5b and Pleasant Hill's frost date answer different questions, while the frost range explains how to read the range around Pleasant Hill's dates instead of trusting one.