USDA Hardiness Zone 10b
Frost Dates for 92663 — Newport Beach, California
NOAA 1991–2020 normals from Newport Beach Harbor, CA (10 ft), 3 miles east.
Updated
No night at or below 32°F was recorded at Newport Beach Harbor, CA in 1991–2020, so Newport Beach has no frost dates to plan around; the coolest month, December, averages a low of 50°F.
- Winters with a freeze
- 0%
- Winters with 36°F
- 5%
- Coldest month low
- 50°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 19 observed
NOAA normal
Frost risk by date in Newport Beach
Newport Beach Harbor, CA, 3 miles east of Newport Beach, did not record a night at or below 32°F in 1991–2020; a 36°F night came in 5% of winters. 10 of the 283 other California stations behind this site's ZIP pages recorded no 32°F night either.
Freeze probabilities 1991–2020 at Newport Beach Harbor, 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 92663 →Compare Newport Beach with another place →
Weather by month in Newport Beach
August is the warmest month at Newport Beach Harbor, CA, averaging 73°F by day and 66°F at night; December is the coldest at 64°F and 50°F. Not one month recorded a 32°F night; the lowest monthly average low is 50°F.
Warmth for growing adds up to 4,668 growing degree days a year (base 50°F), more than at 53% of the 283 California stations. 40% of them (1,860) have built up by the end of June, and August adds the most, 601. Precipitation totals 9.4 inches a year, most in February (2.4") and least in July (0.0"); May to September bring 4% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 65 | 50 | 2.2 | 0% | 0 | 232 |
| Feb | 63 | 51 | 2.4 | 0% | 0 | 201 |
| Mar | 65 | 53 | 1.3 | 0% | 0 | 276 |
| Apr | 66 | 55 | 0.6 | 0% | 0 | 315 |
| May | 67 | 58 | 0.2 | 0% | 0 | 388 |
| Jun | 68 | 62 | 0.1 | 0% | 0 | 449 |
| Jul | 72 | 65 | 0.0 | 0% | 0 | 564 |
| Aug | 73 | 66 | 0.0 | 0% | 0 | 601 |
| Sep | 74 | 64 | 0.1 | 0% | 0 | 573 |
| Oct | 73 | 60 | 0.3 | 0% | 0 | 510 |
| Nov | 68 | 55 | 0.6 | 0% | 0 | 344 |
| Dec | 64 | 50 | 1.6 | 0% | 0 | 216 |
Monthly normals 1991–2020 at Newport Beach Harbor, CA (10 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, Santa Ana John Wayne Airport, CA, 6 miles northeast of Newport Beach, has no 32°F night on record either, and a coolest-month low 2°F colder (48°F).
When it snows in Newport Beach, California
Measurable snow is rare here: only 0 of 19 winters from 1991 to 2020 recorded 0.1 inch or more at Newport Beach Harbor, CA, 2.9 miles away, so there is no typical first-snow date to plan around.
Where these figures come from
ZIP 92663 is 3 miles from Newport Beach Harbor, CA, which stands at 10 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 7 other ZIP codes share the station; its figures are presented in full for 92627 (Costa Mesa). The 2023 USDA Plant Hardiness Zone Map lists ZIP 92663 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.