Frost Dates for 84511 — Blanding, Utah

Half of springs at Blanding, UT see their last 32°F night by April 28; only one in ten is past it by April 13, and one in ten still has one after May 16. Planting tender crops after May 3 leaves a 30% risk of a frost on them, after May 8 20%, and after May 16 10%. The 18 days between the even-odds date and the one-in-ten date is narrower than at 47% of the 66 Utah stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 21 in half of years, as early as October 6 one year in ten, and holds off past November 6 one year in ten. A hard freeze of 28°F follows 11 days later, around November 1; in spring the one-in-ten date for 28°F is May 1, 15 days before the 32°F one. The freeze-free season lasts 174 days in a typical year, longer than at 67% of the 66 Utah stations; it reaches 197 days one year in ten and falls short of 150 one year in ten. On average 127 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 13 days longer, to about May 11, and return around October 10. Severe cold of 16°F or below comes every winter, usually between December 3 and February 16.

July is the warmest month at Blanding, UT, averaging 89°F by day and 62°F at night; January is the coldest at 40°F and 22°F. A freezing night is all but certain in every month from November to April (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 39% of years.

Warmth for growing adds up to 3,166 growing degree days a year (base 50°F), more than at 68% of the 66 Utah stations. 32% of them (1,026) have built up by the end of June, and July adds the most, 789. Precipitation totals 13.0 inches a year, most in January (1.6") and least in June (0.3"); May to September bring 36% of it.

The nearest other station, Bluff, UT, 20 miles south of Blanding and 1,713 feet lower, has a last frost 4 days earlier (April 24), a first frost 8 days earlier (October 13), a season 2 days shorter.

The first measurable snow (0.1 inch or more) in Blanding usually arrives around November 23, and the last of the season around April 1. Those are the middle dates across the winters of 1991–2020 at Blanding, UT, 3.7 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 27 days after the last snow.

ZIP 84511 is 4 miles from Blanding, UT, which stands at 6,032 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 84511 in zone 7a, the band where the coldest night of the year averaged 0 to 5°F (-17.8 to -15.0°C) over 1991–2020; a zone describes winter lows, not frost dates.