Hot Sulphur Springs, CO 80468 Frost Dates
When can you plant in Hot Sulphur Springs, CO?
The last spring frost here typically falls around 06/12, about 288 days from today. The first fall frost typically arrives around 09/10, about 89 frost-free days later.
The USDA Plant Hardiness Zone Map puts Hot Sulphur Springs 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 2 weeks of growing season left in Hot Sulphur Springs before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
06/12 is the middle of 30 years of NOAA records, not a promise. Plant by 05/31 and you're betting against frost in roughly 9 years out of 10. 06/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hot Sulphur Springs compares
Hot Sulphur Springs's growing season runs about 89 days, ranking 39,924 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 550 of 624.
Learn more
zone vs. frost date covers why Zone 5a and Hot Sulphur Springs's frost date answer different questions. the frost range covers how to read the range around Hot Sulphur Springs's dates instead of trusting one.