USDA Hardiness Zone 10b
Frost Dates for 92675 — San Juan Capistrano, California
NOAA 1991–2020 normals from Laguna Beach, CA (44 ft), 8 miles northwest.
Updated
Frost is not a yearly event in San Juan Capistrano: a night at or below 32°F came in 20% of the winters of 1991–2020 at Laguna Beach, CA, and a 36°F night, cold enough for frost on exposed leaves, in 89%. There is no reliable "last frost date" here; most years have none.
- Winters with a freeze
- 20%
- Winters with 36°F
- 89%
- Coldest month low
- 44°F
- Hardiness zone
- 10b
32°F or below, 1991–2020
frost possible on leaves
average, December
35 to 40°F (1.7 to 4.4°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 0%
- Snow per year
- 0"
median, 1991–2020
median, 1991–2020
0 of 18 observed
NOAA normal
Frost risk by date in San Juan Capistrano
At Laguna Beach, CA, 8 miles northwest of San Juan Capistrano, 20% of the winters of 1991–2020 had at least one night at or below 32°F, 1% reached 28°F. Nights of 36°F, enough for frost on exposed leaves, are more common (89% of winters) and, when they come, fall between about December 26 and January 30. January is the month most likely to bring one: a 10% chance in a given year. 62 of the 283 other California stations behind this site's ZIP pages freeze in fewer than half of winters too.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F89% of yrs | Dec 26 | Jan 5 | Jan 10 | Jan 20 | Jan 30 | Feb 6 | Feb 14 | Feb 22 | Feb 28 |
| 32°F20% of yrs | too rare for a date | ||||||||
| 28°F1% of yrs | too rare for a date | ||||||||
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F89% of yrs | Dec 1 | Dec 8 | Dec 13 | Dec 19 | Dec 26 | Dec 31 | Jan 5 | Jan 15 | Feb 2 |
| 32°F20% of yrs | too rare for a date | ||||||||
| 28°F1% of yrs | too rare for a date | ||||||||
Freeze probabilities 1991–2020 at Laguna Beach, CA, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.
Frost risk on any date in 92675 →Compare San Juan Capistrano with another place →
Weather by month in San Juan Capistrano
August is the warmest month at Laguna Beach, CA, averaging 81°F by day and 61°F at night; December is the coldest at 67°F and 44°F. Every month stays under a 10% chance of a 32°F night; January is the likeliest at 10%.
Warmth for growing adds up to 4,786 growing degree days a year (base 50°F), more than at 59% of the 283 California stations. 40% of them (1,938) have built up by the end of June, and August adds the most, 657. Precipitation totals 12.7 inches a year, most in February (3.4") and least in August (0.0"); May to September bring 5% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 68 | 44 | 2.8 | 10% | 1 | 198 |
| Feb | 68 | 45 | 3.4 | 4% | 0 | 178 |
| Mar | 69 | 48 | 1.6 | 0% | 0 | 267 |
| Apr | 73 | 50 | 0.8 | 0% | 0 | 339 |
| May | 75 | 55 | 0.2 | 0% | 0 | 450 |
| Jun | 76 | 58 | 0.1 | 0% | 0 | 507 |
| Jul | 80 | 60 | 0.1 | 0% | 0 | 614 |
| Aug | 81 | 61 | 0.0 | 0% | 0 | 657 |
| Sep | 81 | 59 | 0.2 | 0% | 0 | 593 |
| Oct | 77 | 55 | 0.5 | 0% | 0 | 501 |
| Nov | 72 | 49 | 1.1 | 0% | 0 | 311 |
| Dec | 67 | 44 | 1.9 | 8% | <1 | 174 |
Monthly normals 1991–2020 at Laguna Beach, CA (44 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.
Compared with the next station
The nearest other station, Newport Beach Harbor, CA, 15 miles northwest of San Juan Capistrano, has a 32°F night in 0% of winters against 20% here, and a coolest-month low 6°F warmer (50°F).
When it snows in San Juan Capistrano, California
Measurable snow is rare here: only 0 of 18 winters from 1991 to 2020 recorded 0.1 inch or more at Laguna Beach, CA, 7.7 miles away, so there is no typical first-snow date to plan around.
Where these figures come from
ZIP 92675 is 8 miles from Laguna Beach, CA, which stands at 44 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 92677 (Laguna Niguel). The 2023 USDA Plant Hardiness Zone Map lists ZIP 92675 in zone 10b, the band where the coldest night of the year averaged 35 to 40°F (1.7 to 4.4°C) over 1991–2020; a zone describes winter lows, not frost dates.
Frost dates across California →
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.