Newport Beach Harbor, CA Climate: Temperature & Rain by Month
Annual temperature and rainfall from NOAA NCEI's 1991–2020 normals →; comfort score computed by PlainClimate
30-year climate normals (1991-2020) from Newport Beach Harbor's primary NOAA station, NEWPORT BEACH HARBOR.
The climate verdict for Newport Beach Harbor
Dryness leads the climate profile for Newport Beach Harbor, California, with 9.4 inches of precipitation a year. NOAA records an annual average of 63°F. It scores 76/100 for climate comfort (good), putting it in the top third of station-mapped location scores and exceeding 69% of them.
- 63°F
- yearly average temperature, NOAA normal
- 76/100
- comfort score, above 69% of station-mapped location scores
- 9.4"
- precipitation, annual total
Newport Beach Harbor: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00046175 · Newport Beach Harbor, CA 63°F mean · 9.4" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-ARID · SWING-NARROW · COMF-TOP · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-MILD 63°F
- RANK-UPPER #5,626
- PHOTO-FINISH ≈ Santa Monica
- PRCP-ARID 9.4"
- SWING-NARROW 12°F
- COMF-TOP 76/100
- LOAD-HEAT 1,318 HDD
- STN-1 USC00046175
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Santa Monica Muni, CA (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every CA station list.
- Newport Beach H… (this station) 63°F
- Hot Torrance, CA 63°F
- Near Santa Monica, CA 63°F
- Near Redondo Beach, CA 63°F
- Cold Imperial Beach…, CA 62°F
Climate Living Index · Newport Beach Harbor
Newport Beach Harbor: 76/100 · grade B
Newport Beach Harbor publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Newport Beach Harbor, not an official NOAA rating. Rankings still use Comfort Score 76/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 0 calendar days | 100/100 · A |
| Snowfall burden | 0.0 inches/year | 90/100 · A |
| Annual temperature balance | 62.8°F · 4.7° from 67.5°F | 86/100 · A |
| Precipitation balance | 9.4 in · 25.6 from 35 in | 10/100 · F |
Newport Beach Harbor · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Newport Beach Harbor's normals sit in a dry climate class: BSk
Precipitation is low relative to temperature but above true desert thresholds: cold semi-arid steppe (BSk). Class BSk is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: dry (arid or semi-arid), specifically cold semi-arid steppe.
- Köppen code
- BSk
- Group
- Dry (arid or semi-arid)
- Warmest month
- 69.4°F
- Coldest month
- 57.0°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Newport Beach Harbor sits across the climate record
Three NOAA fields for Newport Beach Harbor's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 18% warmest
- Among 6,861 stations, Newport Beach Harbor sits in the warmer third of annual means.
- Annual precipitation
- Drier than 95%
- Newport Beach Harbor's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 99%
- Warmest-to-coldest month gap for Newport Beach Harbor is compact versus 6,861 complete station-years.
How Newport Beach Harbor compares across U.S. station-mapped locations
Newport Beach Harbor's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
76 Top 31% score exceeds 69% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). Below this entry.
- 70–80: 650 station-mapped locations (11%). This entry sits in this band.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Newport Beach Harbor's measured station temperature trend
MethodologyAcross 69 complete annual observations from 1925 to 2025, NEWPORT BEACH HARBOR warmed at a fitted rate of 0.27°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Newport Beach Harbor primary station fitted change +0.27 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 65°F (18°C) | 50°F (10°C) | 57°F (14°C) | 2.2" | 0.0" | 0.0 | 0.0 |
| February | 63°F (17°C) | 51°F (11°C) | 57°F (14°C) | 2.4" | 0.0" | 0.0 | 0.0 |
| March | 65°F (18°C) | 53°F (12°C) | 59°F (15°C) | 1.3" | 0.0" | 0.0 | 0.0 |
| April | 66°F (19°C) | 55°F (13°C) | 61°F (16°C) | 0.6" | 0.0" | 0.0 | 0.0 |
| May | 67°F (19°C) | 58°F (15°C) | 63°F (17°C) | 0.2" | 0.0" | 0.0 | 0.0 |
| June | 68°F (20°C) | 62°F (16°C) | 65°F (18°C) | 0.1" | 0.0" | 0.0 | 0.0 |
| July | 72°F (22°C) | 65°F (18°C) | 68°F (20°C) | 0.0" | 0.0" | 0.0 | 0.0 |
| August | 73°F (23°C) | 66°F (19°C) | 69°F (21°C) | 0.0" | 0.0" | 0.0 | 0.1 |
| September | 74°F (23°C) | 64°F (18°C) | 69°F (21°C) | 0.1" | 0.0" | 0.0 | 0.1 |
| October | 73°F (23°C) | 60°F (16°C) | 67°F (19°C) | 0.3" | 0.0" | 0.0 | 0.3 |
| November | 68°F (20°C) | 55°F (13°C) | 61°F (16°C) | 0.6" | 0.0" | 0.0 | 0.1 |
| December | 64°F (18°C) | 50°F (10°C) | 57°F (14°C) | 1.6" | 0.0" | 0.0 | 0.0 |
The year, day by day
The calendar barely moves in Newport Beach Harbor: no date carries a normal high of 90°F or a normal low at freezing. The year runs between 49°F near December 16 and 74°F near September 6.
No freezing date
Not one calendar date in the 1991–2020 record carries a normal low at or below 32°F. The coldest normal low of the year is 49°F around December 16.
Where the wet dates fall
The likeliest wet date is February 16, when 23% of years recorded at least a hundredth of an inch. The driest is August 16 at 1%. Summed across the calendar, that is about 35 wet dates a year.
The widest day
January 2 carries the biggest normal gap between afternoon and dawn, 15°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Newport Beach Harbor.
Where Newport Beach Harbor Stands Nationally
Aridity defines the water calendar: about 9 inches in a normal year lands this among the driest tenth of ranked stations.
Among the steadiest day-night climates ranked: even the widest normal daily swing holds to roughly 15°F.
Newport Beach Harbor earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall and snowfall
6.4 days with precipitation
6.6 days with precipitation
4.8 days with precipitation
2.7 days with precipitation
1.5 days with precipitation
0.6 days with precipitation
0.6 days with precipitation
0.2 days with precipitation
0.5 days with precipitation
2.0 days with precipitation
3.2 days with precipitation
5.7 days with precipitation
Newport Beach Harbor's wet season runs through the cold months
December, January and February carry 66% of the year's precipitation here, while June through August contribute 1%. That is the cool-season-dominant pattern of the West Coast and the higher inland West, where storm tracks swing south in winter and summer turns dry; the thermometer meanwhile shows an unusually narrow 12.4°F seasonal spread.
- Wettest month
- February, 2.4"
- Driest month
- August, 0.0"
- Wettest three months
- February, January, December (66% of the year)
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A cool-season label means the December-February share reaches 35%. Where snow falls, the monthly figures above report liquid-equivalent precipitation, so a wet winter month is not necessarily a rainy one.
How Newport Beach Harbor's precipitation splits across the calendar
About 35 days a year record measurable precipitation here, carrying 9.4" between them, or roughly 0.27 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Newport Beach Harbor's record shows no measurable snowfall
This station measured snowfall across the 1991-2020 period and recorded none: the annual normal is 0.0 inches. That is a measured zero rather than missing data, which is a meaningful distinction here , most stations in the database simply do not report snow at all, and those pages say nothing about it.
A thirty-year normal of zero describes the typical year at this station. It is not a claim that snow has never fallen in the area.
Frost Dates & Growing Season
First Fall Freeze
N/A
50% probability date
Last Spring Freeze
N/A
50% probability date
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,318
Higher = more heating needed
Cooling Degree Days
509
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside CA closest to Newport Beach Harbor on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (63°F here).
- Alexander City, AL 63°F · 0.0°F off
- Alpine, TX 63°F · 0.0°F off
- Bowie, TX 63°F · 0.0°F off
- Calhoun City, MS 63°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (9.4" here), excluding temperature-peer places.
- Altamont, UT 9.4" · 0.0" off
- Twin Bridges, MT 9.4" · 0.0" off
- Duchesne, UT 9.4" · 0.0" off
- Kemmerer, WY 9.4" · 0.0" off
Scarce-water calendar
Where Newport Beach Harbor's limited precipitation lands
heating led · dry · low swing
Heating is the larger measured load in Newport Beach Harbor, at 1,318 degree days versus 509 for cooling. Unlike a strongly continental record, however, its 12.4°F month-to-month range is compact; persistent cool-season demand matters more than a dramatic summer-to-winter reversal.
A frost-free growing-season length is not available for Newport Beach Harbor. That missing field is kept separate from the observed temperature and precipitation record rather than filled from a regional estimate.
The calendar stays thermally compact and dry. August and December mark the typical warm and cold ends of the calendar, only 12.4°F apart, while the annual precipitation total remains below PlainClimate's dry threshold. The annual average is 63°F. The monthly rows show whether that limited precipitation is spread through the year or concentrated in a shorter interval.
Newport Beach Harbor's cold-season load does not imply a wet climate. Annual precipitation is 9.4 inches, which places the station in PlainClimate's dry range. Recorded annual snowfall is negligible. The snowfall and rainfall fields should be read separately rather than inferred from temperature.
Newport Beach Harbor wettest normal
February
February concentrates the scarce annual total (9.4 inches).
Newport Beach Harbor driest normal
August
August is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about Newport Beach Harbor's climate
How dry is Newport Beach Harbor? ▼
How much energy does heating and cooling require in Newport Beach Harbor? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Newport Beach Harbor's primary station: NEWPORT BEACH HARBOR (USC00046175). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Newport Beach Harbor; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Newport Beach Harbor comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.