Frost Dates for 84602 — Provo, Utah

Half of springs at Pleasant Grove, UT see their last 32°F night by April 17; only one in ten is past it by March 30, and one in ten still has one after May 7. Planting tender crops after April 26 leaves a 30% risk of a frost on them, after April 30 20%, and after May 7 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 25 in half of years, as early as October 10 one year in ten, and holds off past November 8 one year in ten. A hard freeze of 28°F follows 11 days later, around November 5; in spring the one-in-ten date for 28°F is April 17, 20 days before the 32°F one. The freeze-free season lasts 188 days in a typical year, longer than at 91% of the 66 Utah stations; it reaches 213 days one year in ten and falls short of 162 one year in ten. On average 123 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 16 days longer, to about May 3, and return around October 13. Severe cold of 16°F or below comes every winter, usually between December 6 and February 6.

July is the warmest month at Pleasant Grove, UT, averaging 93°F by day and 64°F at night; January is the coldest at 41°F and 24°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 85% of years and May still brings one in 20% of years.

Warmth for growing adds up to 3,613 growing degree days a year (base 50°F), more than at 85% of the 66 Utah stations. 32% of them (1,153) have built up by the end of June, and July adds the most, 888. Precipitation totals 16.7 inches a year, most in January (2.0") and least in July (0.6"); May to September bring 32% of it.

The nearest other station, Orem Trtmt Plt, UT, 6 miles south of Provo and 182 feet lower, has a last frost 2 days later (April 19), a first frost 6 days earlier (October 19), a season 6 days shorter.

The first measurable snow (0.1 inch or more) in Provo usually arrives around November 13, and the last of the season around April 3. Those are the middle dates across the winters of 1991–2020 at Pleasant Grove, UT, 0.8 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 14 days after the last snow.

ZIP 84602 is under a mile from Pleasant Grove, UT, which stands at 4,692 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station; its figures are presented in full for 84003 (American Fork). ZIP 84602 is not in the ZIP-code listing of the 2023 USDA Plant Hardiness Zone Map, so no zone is given.