Frost Dates for 95691 — West Sacramento, California

Half of springs at Sacramento Executive Airport, CA see their last 32°F night by February 2; only one in ten is past it by January 2, and one in ten still has one after March 5. Planting tender crops after February 17 leaves a 30% risk of a frost on them, after February 25 20%, and after March 5 10%. The 31 days between the even-odds date and the one-in-ten date is wider than at 53% 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 December 2 in half of years, as early as November 16 one year in ten, and holds off past January 2 one year in ten. A hard freeze of 28°F follows 14 days later, around December 16; in spring the one-in-ten date for 28°F is February 1, 32 days before the 32°F one. The freeze-free season lasts 301 days in a typical year, longer than at 64% of the 219 California stations; it reaches 338 days one year in ten and falls short of 266 one year in ten. On average 15 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 40 days longer, to about March 14, and return around November 18. A 24°F night is unusual: 22% of winters had one.

July is the warmest month at Sacramento Executive Airport, CA, averaging 93°F by day and 59°F at night; December is the coldest at 56°F and 39°F. From April to October the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 44% of years and March still brings one in 14% of years.

Warmth for growing adds up to 4,621 growing degree days a year (base 50°F), more than at 52% of the 283 California stations. 38% of them (1,737) have built up by the end of June, and July adds the most, 803. Precipitation totals 18.3 inches a year, most in January (3.7") and least in July (0.0"); May to September bring 6% of it.

The nearest other station, Sacramento 5 ESE, CA, 7 miles east of West Sacramento, has a last frost 21 days earlier (January 12), a first frost 14 days later (December 16), a season 40 days longer.

Measurable snow is rare here: only 0 of 24 winters from 1991 to 2020 recorded 0.1 inch or more at Sacramento 5 ESE, CA, 7 miles away, so there is no typical first-snow date to plan around.

ZIP 95691 is 5 miles from Sacramento Executive Airport, CA, which stands at 15 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 11 other ZIP codes share the station; its figures are presented in full for 95823 (Sacramento). The 2023 USDA Plant Hardiness Zone Map lists ZIP 95691 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.