Frost Dates for 98936 — Moxee, Washington

Half of springs at Moxee City 10 E, WA see their last 32°F night by May 4; only one in ten is past it by April 21, and one in ten still has one after May 23. Planting tender crops after May 11 leaves a 30% risk of a frost on them, after May 16 20%, and after May 23 10%. The 19 days between the even-odds date and the one-in-ten date is narrower than at 49% of the 113 Washington stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 10 in half of years, as early as September 26 one year in ten, and holds off past October 25 one year in ten. A hard freeze of 28°F follows 13 days later, around October 23; in spring the one-in-ten date for 28°F is May 5, 18 days before the 32°F one. The freeze-free season lasts 155 days in a typical year, shorter than at 82% of the 113 Washington stations; it reaches 177 days one year in ten and falls short of 132 one year in ten. On average 139 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 19 days longer, to about May 23, and return around September 27. Severe cold of 16°F or below comes every winter, usually between November 29 and February 13.

July is the warmest month at Moxee City 10 E, WA, averaging 88°F by day and 54°F at night; December is the coldest at 37°F and 24°F. A freezing night is all but certain in every month from October to April (a 90% chance or more). From June to August the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 59% of years.

Warmth for growing adds up to 2,458 growing degree days a year (base 50°F), more than at 75% of the 113 Washington stations. 29% of them (724) have built up by the end of June, and July adds the most, 654. Precipitation totals 7.7 inches a year, most in December (1.1") and least in July (0.2"); May to September bring 29% of it.

The nearest other station, Wapato, WA, 8 miles southwest of Moxee and 709 feet lower, has a last frost 13 days earlier (April 21), a first frost 5 days later (October 15), a season 21 days longer.

The first measurable snow (0.1 inch or more) in Moxee usually arrives around November 29, and the last of the season around January 31. Those are the middle dates across the winters of 1991–2020 at Moxee City 10 E, WA, 8.2 miles away: half of years saw snow earlier, half later. Snow fell in 96% of those winters. The last 32°F night of spring typically comes 93 days after the last snow.

ZIP 98936 is 8 miles from Moxee City 10 E, WA, which stands at 1,550 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 98936 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.