Frost Dates for 80758 — Wray, Colorado

Half of springs at Wray, CO see their last 32°F night by May 7; only one in ten is past it by April 25, and one in ten still has one after May 19. Planting tender crops after May 12 leaves a 30% risk of a frost on them, after May 15 20%, and after May 19 10%. The 12 days between the even-odds date and the one-in-ten date is narrower than at 81% of the 110 Colorado stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 6 in half of years, as early as September 25 one year in ten, and holds off past October 16 one year in ten. A hard freeze of 28°F follows 9 days later, around October 15; in spring the one-in-ten date for 28°F is May 11, 8 days before the 32°F one. The freeze-free season lasts 151 days in a typical year, longer than at 62% of the 110 Colorado stations; it reaches 167 days one year in ten and falls short of 134 one year in ten. On average 165 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 9 days longer, to about May 16, and return around September 29. Severe cold of 16°F or below comes every winter, usually between November 8 and March 28.

July is the warmest month at Wray, CO, averaging 91°F by day and 61°F at night; January is the coldest at 43°F and 16°F. A freezing night is all but certain in every month from October to April (a 90% chance or more). From June to August the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 77% of years.

Warmth for growing adds up to 3,192 growing degree days a year (base 50°F), more than at 83% of the 110 Colorado stations. 33% of them (1,045) have built up by the end of June, and July adds the most, 803. Precipitation totals 18.4 inches a year, most in July (3.4") and least in January (0.4"); May to September bring 67% of it.

The nearest other station, Yuma, CO, 27 miles west of Wray and 581 feet higher, has a last frost 6 days earlier (May 1), a first frost 6 days later (October 12), a season 13 days longer.

The first measurable snow (0.1 inch or more) in Wray usually arrives around October 30, and the last of the season around April 7. Those are the middle dates across the winters of 1991–2020 at Wray, CO, 1.2 miles away: half of years saw snow earlier, half later. Every one of those winters saw snow. The last 32°F night of spring typically comes 30 days after the last snow.

ZIP 80758 is 1 mile from Wray, CO, which stands at 3,553 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 80758 in zone 5b, the band where the coldest night of the year averaged -15 to -10°F (-26.1 to -23.3°C) over 1991–2020; a zone describes winter lows, not frost dates.