Webster City, IA 50595 Frost Dates
When can you plant in Webster City, IA?
The last spring frost here typically falls around 05/03, about 248 days from today. The first fall frost typically arrives around 10/02, about 150 frost-free days later.
The USDA Plant Hardiness Zone Map puts Webster City in Zone 5a (-20 to -15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 5 weeks of growing season left in Webster City before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Webster City's last frost
05/03 is the middle of 30 years of NOAA records, not a promise. Plant by 04/20 and you're betting against frost in roughly 9 years out of 10. 05/16 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Webster City compares
About 150 days separate Webster City's last and first frost, putting it 35,266 of 40,283 ZIP codes nationally. Within IA, it ranks 997 of 1,042.
Learn more
zone vs. frost date covers why Zone 5a and Webster City's frost date answer different questions. the frost range covers how to read the range around Webster City's dates instead of trusting one.