Frost Dates for 84741 — Kanab, Utah

Half of springs at Paria Rs, UT see their last 32°F night by April 19; only one in ten is past it by April 1, and one in ten still has one after May 9. Planting tender crops after April 26 leaves a 30% risk of a frost on them, after May 1 20%, and after May 9 10%. The 20 days between the even-odds date and the one-in-ten date is wider than at 61% of the 66 Utah stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 23 in half of years, as early as October 9 one year in ten, and holds off past November 6 one year in ten. A hard freeze of 28°F follows 10 days later, around November 2; in spring the one-in-ten date for 28°F is April 21, 18 days before the 32°F one. The freeze-free season lasts 186 days in a typical year, longer than at 88% of the 66 Utah stations; it reaches 208 days one year in ten and falls short of 162 one year in ten. On average 125 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 2, and return around October 14. Severe cold of 16°F or below comes every winter, usually between December 1 and February 10.

July is the warmest month at Paria Rs, UT, averaging 96°F by day and 65°F at night; December is the coldest at 46°F and 21°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 88% of years and May still brings one in 20% of years.

Warmth for growing adds up to 4,026 growing degree days a year (base 50°F), more than at 95% of the 66 Utah stations. 34% of them (1,361) have built up by the end of June, and July adds the most, 950. Precipitation totals 10.2 inches a year, most in October (1.3") and least in June (0.3"); May to September bring 39% of it.

The first measurable snow (0.1 inch or more) in Kanab usually arrives around December 5, and the last of the season around March 3. Those are the middle dates across the winters of 1991–2020 at Kanab, UT, 25 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 47 days after the last snow.

ZIP 84741 is 13 miles from Paria Rs, UT, which stands at 4,426 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 84741 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.