Frost Dates for 84654 — Salina, Utah

Half of springs at Salina 24 E, UT see their last 32°F night by May 29; only one in ten is past it by May 12, and one in ten still has one after June 15. Planting tender crops after June 3 leaves a 30% risk of a frost on them, after June 8 20%, and after June 15 10%. The 17 days between the even-odds date and the one-in-ten date is narrower than at 68% of the 66 Utah stations behind this site's ZIP pages.

In fall the first 32°F night comes by September 26 in half of years, as early as September 12 one year in ten, and holds off past October 9 one year in ten. A hard freeze of 28°F follows 10 days later, around October 6; in spring the one-in-ten date for 28°F is May 31, 15 days before the 32°F one. The freeze-free season lasts 118 days in a typical year, shorter than at 80% of the 66 Utah stations; it reaches 138 days one year in ten and falls short of 98 one year in ten. On average 190 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 11 days longer, to about June 9, and return around September 17. Severe cold of 16°F or below comes every winter, usually between November 7 and April 4.

July is the warmest month at Salina 24 E, UT, averaging 80°F by day and 53°F at night; December is the coldest at 32°F and 15°F. A freezing night is all but certain in every month from October to May (a 90% chance or more). From July to August the chance of a 32°F night stays under 10% each month. In spring, June still brings one in 40% of years.

Warmth for growing adds up to 1,563 growing degree days a year (base 50°F), fewer than at 95% of the 66 Utah stations. 25% of them (388) have built up by the end of June, and July adds the most, 507. Precipitation totals 13.3 inches a year, most in August (1.5") and least in June (0.7"); May to September bring 45% of it.

The nearest other station, Richfield Radio Ksvc, UT, 22 miles southwest of Salina and 2,275 feet lower, has a last frost 8 days earlier (May 21), a first frost 2 days earlier (September 24), a season 7 days longer.

The first measurable snow (0.1 inch or more) in Salina usually arrives around November 10, and the last of the season around April 28. Those are the middle dates across the winters of 1991–2020 at Salina 24 E, UT, 16.8 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 31 days after the last snow.

ZIP 84654 is 17 miles from Salina 24 E, UT, which stands at 7,560 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 84654 in zone 6a, the band where the coldest night of the year averaged -10 to -5°F (-23.3 to -20.6°C) over 1991–2020; a zone describes winter lows, not frost dates.