Frost Dates for 83334 — Hansen, Idaho

Half of springs at Twin Falls 6 E, ID see their last 32°F night by May 6; only one in ten is past it by April 22, and one in ten still has one after May 26. Planting tender crops after May 12 leaves a 30% risk of a frost on them, after May 17 20%, and after May 26 10%. The 20 days between the even-odds date and the one-in-ten date is wider than at 69% of the 67 Idaho stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 3 in half of years, as early as September 16 one year in ten, and holds off past October 18 one year in ten. A hard freeze of 28°F follows 14 days later, around October 17; in spring the one-in-ten date for 28°F is May 7, 19 days before the 32°F one. The freeze-free season lasts 150 days in a typical year, longer than at 55% of the 67 Idaho stations; it reaches 170 days one year in ten and falls short of 126 one year in ten. On average 156 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 17 days longer, to about May 23, and return around September 19. Severe cold of 16°F or below comes every winter, usually between November 23 and February 20.

July is the warmest month at Twin Falls 6 E, ID, averaging 87°F by day and 55°F at night; December is the coldest at 37°F and 21°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 68% of years.

Warmth for growing adds up to 2,311 growing degree days a year (base 50°F), more than at 55% of the 67 Idaho stations. 29% of them (659) have built up by the end of June, and July adds the most, 645. Precipitation totals 10.8 inches a year, most in May (1.4") and least in July (0.2"); May to September bring 31% of it.

The nearest other station, Twin Falls Sun Vly Regional Airport, ID, 10 miles west of Hansen and 191 feet higher, has a last frost 3 days later (May 9), a first frost 1 day later (October 4), a season 3 days shorter.

The first measurable snow (0.1 inch or more) in Hansen usually arrives around November 22, and the last of the season around March 28. Those are the middle dates across the winters of 1991–2020 at Twin Falls 6 E, ID, 5 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 39 days after the last snow.

ZIP 83334 is 5 miles from Twin Falls 6 E, ID, which stands at 3,960 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 83341 (Kimberly). The 2023 USDA Plant Hardiness Zone Map lists ZIP 83334 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.