Linn Grove, IA 51033 Frost Dates
Linn Grove, IA: when does the frost end?
The last spring frost here typically falls around 04/30, about 245 days from today. Fall's first freeze usually shows up around 10/05, roughly 159 days after the last spring frost.
Linn Grove sits in USDA Zone 5a (-20 to -15°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 5 weeks until Linn Grove's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/11 and only about 1 year in 10 sees frost after that.
Linn Grove against the rest of the dataset
About 159 days separate Linn Grove's last and first frost, putting it 32,793 of 40,283 ZIP codes nationally. Within IA, it ranks 805 of 1,042.
Learn more
Before leaning on 51033's figures: zone vs. frost date explains why Zone 5a and Linn Grove's frost date answer different questions, while the frost range explains how to read the range around Linn Grove's dates instead of trusting one.