Newport Beach weather in September: Newport Beach, California: normal highs, lows, rain and records for September
Newport Beach in September has a normal high of 74°F and a normal low of 64°F, a daily mean of 69°F, holding near 74°F all month. Measurable precipitation falls on 1 days in a normal September, 0.10 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 18°C, 3 mm of precipitation in September.
- NOAA stationNewport Beach Harbor
- Station IDUSC00046175
- Location33.60°N 117.88°W
- Elevation10 ft (3 m)
- From the centerunder 1 mile
- Population82,970
- Jan 65° 50°
- Feb 63° 51°
- Mar 65° 53°
- Apr 66° 55°
- May 67° 58°
- Jun 68° 62°
- Jul 72° 65°
- Aug 73° 66°
- Sep 74° 64°
- Oct 73° 60°
- Nov 68° 55°
- Dec 64° 50°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Newport Beach in September?
The normal high is 74°F and the normal low 64°F, for a daily mean of 69.1°F. September is 0.3°F cooler than August and 2.6°F warmer than October. September is the 2nd warmest month of the year in Newport Beach and the 9th wettest. From one year to the next September's mean temperature typically moves about 1.6°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 68°F and 71°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 3%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 74°F | 65°F | 1% | 0% |
| September 8 | 74°F | 65°F | 2% | 1% |
| September 15 | 74°F | 64°F | 2% | 1% |
| September 22 | 74°F | 64°F | 2% | 1% |
| September 30 | 74°F | 63°F | 3% | 1% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 6, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 74°F | 65°F | 1% | 0% | 12 h 50 min |
| September 2 | 74°F | 65°F | 1% | 0% | 12 h 50 min |
| September 3 | 74°F | 65°F | 1% | 0% | 12 h 50 min |
| September 4 | 74°F | 65°F | 1% | 0% | 12 h 50 min |
| September 5 | 74°F | 65°F | 1% | 0% | 12 h 50 min |
| September 6 | 74°F | 65°F | 1% | 0% | 12 h 40 min |
| September 7 | 74°F | 65°F | 2% | 0% | 12 h 40 min |
| September 8 | 74°F | 65°F | 2% | 1% | 12 h 40 min |
| September 9 | 74°F | 65°F | 2% | 1% | 12 h 40 min |
| September 10 | 74°F | 65°F | 2% | 1% | 12 h 40 min |
| September 11 | 74°F | 65°F | 2% | 1% | 12 h 30 min |
| September 12 | 74°F | 65°F | 2% | 1% | 12 h 30 min |
| September 13 | 74°F | 65°F | 2% | 1% | 12 h 30 min |
| September 14 | 74°F | 64°F | 2% | 1% | 12 h 30 min |
| September 15 | 74°F | 64°F | 2% | 1% | 12 h 30 min |
| September 16 | 74°F | 64°F | 2% | 1% | 12 h 20 min |
| September 17 | 74°F | 64°F | 2% | 1% | 12 h 20 min |
| September 18 | 74°F | 64°F | 2% | 1% | 12 h 20 min |
| September 19 | 74°F | 64°F | 2% | 1% | 12 h 20 min |
| September 20 | 74°F | 64°F | 2% | 1% | 12 h 20 min |
| September 21 | 74°F | 64°F | 2% | 1% | 12 h 10 min |
| September 22 | 74°F | 64°F | 2% | 1% | 12 h 10 min |
| September 23 | 74°F | 63°F | 3% | 1% | 12 h 10 min |
| September 24 | 74°F | 63°F | 3% | 1% | 12 h 10 min |
| September 25 | 74°F | 63°F | 3% | 1% | 12 h 10 min |
| September 26 | 74°F | 63°F | 3% | 1% | 12 h |
| September 27 | 74°F | 63°F | 3% | 1% | 12 h |
| September 28 | 74°F | 63°F | 3% | 1% | 12 h |
| September 29 | 74°F | 63°F | 3% | 1% | 12 h |
| September 30 | 74°F | 63°F | 3% | 1% | 11 h 50 min |
- Normal high
- 74°FSeptember average
- Normal low
- 64°FSeptember average
- Precipitation
- 0.10 inmonth total
- Days with precipitation
- 10.01 inch or more
- Daylight
- 12 h 50 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 23
- Days at 80°F or more
- 2
- Sunshine
- 91%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00046175; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Newport Beach in September?
On a given September day the chance of 0.01 inch or more is 2% on average, highest around September 30 (3%). In all, 0.10 in falls on 1 days of a normal September.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00046175.
What are the records for September in Newport Beach?
The warmest September temperature on this station's record (since 1921) is 107°F, on September 26, 1963; the coldest is 45°F, on September 9, 1929. The wettest September brought 3.13 in (1939).
The September mean against the 1991-2020 normal of 69.1°F: 2021 67.5°F (−1.6), 2022 73.4°F (+4.3), 2023 68.8°F (−0.3), 2024 69.9°F (+0.8), 2025 70.2°F (+1.1). 3 of 5 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 67.5°F | −1.6°F | 0.00 in |
| 2022 | 73.4°F | +4.3°F | 0.15 in |
| 2023 | 68.8°F | −0.3°F | 0.04 in |
| 2024 | 69.9°F | +0.8°F | 0.00 in |
| 2025 | 70.2°F | +1.1°F | 0.06 in |
Source: records: ACIS, station USC00046175; recent months: ACIS, station USC00046175. Records and recent months use complete months only.
How does September in Newport Beach compare across California?
Across the 219 places PlainClimate covers in California, September normal highs run from 64°F in Eureka to 104°F in Brawley; Newport Beach's is 74°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Newport Beach in August73°F by day, 66°F at night
- Newport Beach in October73°F by day, 60°F at night
- Newport Beach through the yearEvery month, frost dates, records and recent years
- California in SeptemberThe statewide normal and the warmest and coolest places
- Brawley: California's warmest Septembernormal high 104°F