Cannonville, UT 84718 Frost Dates
Frost dates for Cannonville, UT, ZIP 84718
Around 05/23 is the usual last spring frost, about 268 days away. The first fall frost typically arrives around 09/27, about 125 frost-free days later.
The USDA Plant Hardiness Zone Map puts Cannonville in Zone 6a (-10 to -5°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
Zone 6a around Cannonville has about 4 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
05/23 is the middle of 30 years of NOAA records, not a promise. Plant by 05/08 and you're betting against frost in roughly 9 years out of 10. 06/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Cannonville compares
At roughly 125 frost-free days, Cannonville places 38,816 of 40,283 ZIP codes in this dataset. Within UT, it ranks 271 of 344.
Learn more
zone vs. frost date explains why Zone 6a and Cannonville's frost date answer different questions, and the frost range explains how to read the range around Cannonville's dates instead of trusting one.