Fredericksburg, IA 50630 Frost Dates
When can you plant in Fredericksburg, IA?
Around 05/02 is the usual last spring frost, about 247 days away. The first fall frost typically arrives around 10/05, about 155 frost-free days later.
Fredericksburg 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.
What to do before the first frost
About 5 weeks of growing season left in Fredericksburg before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Fredericksburg's last frost
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/17 and you're betting against frost in roughly 9 years out of 10. 05/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Fredericksburg compares
Fredericksburg's growing season runs about 155 days, ranking 34,042 of 40,283 US ZIP codes measured here, longest to shortest. Within IA, it ranks 872 of 1,042.
Learn more
local microclimates covers what one yard in Fredericksburg can differ from the 50630 normal. zone vs. frost date covers why Zone 5a and Fredericksburg's frost date answer different questions.