Frost Dates for 99762 — Nome, Alaska

Half of springs at Nome Municipal Airport, AK see their last 32°F night by June 5; only one in ten is past it by May 20, and one in ten still has one after June 26. Planting tender crops after June 13 leaves a 30% risk of a frost on them, after June 18 20%, and after June 26 10%. The 21 days between the even-odds date and the one-in-ten date is wider than at 95% of the 37 Alaska stations behind this site's ZIP pages, so a fixed calendar date is a gamble here.

In fall the first 32°F night comes by September 3 in half of years, as early as August 15 one year in ten, and holds off past September 22 one year in ten. A hard freeze of 28°F follows 16 days later, around September 19; in spring the one-in-ten date for 28°F is June 6, 20 days before the 32°F one. The freeze-free season lasts 88 days in a typical year, shorter than at 97% of the 37 Alaska stations; it reaches 112 days one year in ten and falls short of 63 one year in ten. On average 231 nights a year drop to 32°F or below. Severe cold of 16°F or below comes every winter, usually between October 21 and May 1.

July is the warmest month at Nome Municipal Airport, AK, averaging 58°F by day and 46°F at night; January is the coldest at 13°F and -2°F. A freezing night is all but certain in every month from September to May (a 90% chance or more). July is the only month with under a 10% chance of a 32°F night. In spring, June still brings one in 66% of years.

Warmth for growing adds up to 247 growing degree days a year (base 50°F), the fewest of the 37 Alaska stations. 29% of them (73) have built up by the end of June, and July adds the most, 99. Precipitation totals 17.2 inches a year, most in August (3.2") and least in March (0.7"); May to September bring 56% of it.

The first measurable snow (0.1 inch or more) in Nome usually arrives around October 6, and the last of the season around May 10. Those are the middle dates across the winters of 1991–2020 at Nome Municipal Airport, AK, 10 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 26 days after the last snow.

ZIP 99762 is 10 miles from Nome Municipal Airport, AK, which stands at 13 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 99762 in zone 3b, the band where the coldest night of the year averaged -35 to -30°F (-37.2 to -34.4°C) over 1991–2020; a zone describes winter lows, not frost dates.