Loveland, CO 80539 Frost Dates
When can you plant in Loveland, CO?
Around 05/12 is the usual last spring frost, about 257 days away. The first fall frost typically arrives around 10/01, about 141 frost-free days later.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Loveland, not a forecast for this year.
What to do before the first frost
About 5 weeks of growing season left in Loveland before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/12 isn't a guarantee
05/12 is the middle of 30 years of NOAA records, not a promise. Plant by 04/30 and you're betting against frost in roughly 9 years out of 10. 05/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Loveland compares
About 141 days separate Loveland's last and first frost, putting it 36,859 of 40,283 ZIP codes nationally. Within CO, it ranks 399 of 624.
Learn more
the frost range covers how to read the range around Loveland's dates instead of trusting one. local microclimates covers what one yard in Loveland can differ from the 80539 normal.