Hot Sulphur Springs, CO 80451 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.
Hot Sulphur Springs sits in USDA Zone 5b (-15 to -10°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 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.
Why 06/12 isn't a guarantee
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
At roughly 89 frost-free days, Hot Sulphur Springs places 39,923 of 40,283 ZIP codes in this dataset. Within CO, it ranks 549 of 624.
Learn more
local microclimates covers what one yard in Hot Sulphur Springs can differ from the 80451 normal. zone vs. frost date covers why Zone 5b and Hot Sulphur Springs's frost date answer different questions.