Frost Dates for 93631 — Kingsburg, California

Half of springs at Hanford Municipal Airport, CA see their last 32°F night by February 20; only one in ten is past it by January 18, and one in ten still has one after March 21. Planting tender crops after March 1 leaves a 30% risk of a frost on them, after March 9 20%, and after March 21 10%. The 29 days between the even-odds date and the one-in-ten date is narrower than at 52% of the 220 California 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 November 23 in half of years, as early as November 6 one year in ten, and holds off past December 12 one year in ten. A hard freeze of 28°F follows 12 days later, around December 5; in spring the one-in-ten date for 28°F is February 18, 31 days before the 32°F one. The freeze-free season lasts 276 days in a typical year, shorter than at 51% of the 219 California stations; it reaches 314 days one year in ten and falls short of 239 one year in ten. On average 31 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 33 days longer, to about March 25, and return around November 9. A 24°F night is unusual: 46% of winters had one.

July is the warmest month at Hanford Municipal Airport, CA, averaging 98°F by day and 64°F at night; December is the coldest at 57°F and 35°F. From April to October the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 73% of years and March still brings one in 28% of years.

Warmth for growing adds up to 5,283 growing degree days a year (base 50°F), more than at 73% of the 283 California stations. 39% of them (2,045) have built up by the end of June, and July adds the most, 964. Precipitation totals 8.2 inches a year, most in January (1.6") and least in July (0.0"); May to September bring 6% of it.

The nearest other station, Hanford 1 S, CA, 14 miles south of Kingsburg, has a last frost 13 days earlier (February 7), a first frost 8 days later (December 1), a season 20 days longer.

Measurable snow is rare here: only 0 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Hanford 1 S, CA, 14.1 miles away, so there is no typical first-snow date to plan around.

ZIP 93631 is 14 miles from Hanford Municipal Airport, CA, which stands at 249 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 93631 in zone 9b, the band where the coldest night of the year averaged 25 to 30°F (-3.9 to -1.1°C) over 1991–2020; a zone describes winter lows, not frost dates.