Frost Dates for 84414 — North Ogden, Utah

Half of springs at Ogden NE Bench, UT see their last 32°F night by April 19; only one in ten is past it by April 2, and one in ten still has one after May 4. Planting tender crops after April 26 leaves a 30% risk of a frost on them, after April 30 20%, and after May 4 10%. The 15 days between the even-odds date and the one-in-ten date is narrower than at 89% of the 66 Utah stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 22 in half of years, as early as October 7 one year in ten, and holds off past November 5 one year in ten. A hard freeze of 28°F follows 10 days later, around November 1; in spring the one-in-ten date for 28°F is April 20, 14 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 165 one year in ten. On average 116 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 12. Severe cold of 16°F or below comes every winter, usually between December 1 and February 12.

July is the warmest month at Ogden NE Bench, UT, averaging 89°F by day and 62°F at night; January is the coldest at 37°F and 22°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 90% of years and May still brings one in 17% of years.

Warmth for growing adds up to 3,024 growing degree days a year (base 50°F), more than at 62% of the 66 Utah stations. 30% of them (900) have built up by the end of June, and July adds the most, 790.

The nearest other station, Ogden Pioneer Ph, UT, 5 miles south of North Ogden and 222 feet lower, has a last frost 2 days later (April 21), a first frost 1 day later (October 23), a season 2 days shorter.

The first measurable snow (0.1 inch or more) in North Ogden usually arrives around November 5, and the last of the season around April 17. Those are the middle dates across the winters of 1991–2020 at Pineview Dam, UT, 7.6 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 2 days after the last snow.

ZIP 84414 is 5 miles from Ogden NE Bench, UT, which stands at 4,572 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 84414 in zone 6b, the band where the coldest night of the year averaged -5 to 0°F (-20.6 to -17.8°C) over 1991–2020; a zone describes winter lows, not frost dates.