Frost Dates for 93285 — Wofford Heights, California

Half of springs at Kern River Ph 3, CA see their last 32°F night by April 7; only one in ten is past it by March 16, and one in ten still has one after April 28. Planting tender crops after April 14 leaves a 30% risk of a frost on them, after April 19 20%, and after April 28 10%. The 21 days between the even-odds date and the one-in-ten date is narrower than at 84% 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 11 in half of years, as early as October 30 one year in ten, and holds off past November 26 one year in ten. A hard freeze of 28°F follows 13 days later, around November 24; in spring the one-in-ten date for 28°F is April 6, 22 days before the 32°F one. The freeze-free season lasts 217 days in a typical year, shorter than at 76% of the 219 California stations; it reaches 241 days one year in ten and falls short of 193 one year in ten. On average 68 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 April 26, and return around October 31. Nights of 24°F, cold enough to damage hardier plants, come in 95% of winters and 16°F in 6%.

July is the warmest month at Kern River Ph 3, CA, averaging 99°F by day and 63°F at night; December is the coldest at 60°F and 31°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 67% of years.

Warmth for growing adds up to 4,694 growing degree days a year (base 50°F), more than at 54% of the 283 California stations. 33% of them (1,545) have built up by the end of June, and July adds the most, 948. Precipitation totals 11.9 inches a year, most in February (2.4") and least in June (0.1"); May to September bring 8% of it.

The nearest other station, S Lake Fs, CA, 8 miles southeast of Wofford Heights, has a last frost 2 days earlier (April 5), a first frost 8 days earlier (November 3), a season 5 days shorter.

The first measurable snow (0.1 inch or more) in Wofford Heights usually arrives around December 24, and the last of the season around February 20. Those are the middle dates across the winters of 1991–2020 at Glennville, CA, 12.2 miles away: half of years saw snow earlier, half later. Snow fell in 90% of those winters. The last 32°F night of spring typically comes 46 days after the last snow.

ZIP 93285 is 5 miles from Kern River Ph 3, CA, which stands at 2,703 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 93285 in zone 8b, the band where the coldest night of the year averaged 15 to 20°F (-9.4 to -6.7°C) over 1991–2020; a zone describes winter lows, not frost dates.