Long Beach, CA weather in September
In September, Long Beach sees highs around 82°F and lows around 64°F: warm and dry. Expect about 1 wet day. It is one of the warmest months in Long Beach. Good for outdoor plans.
- Normal high
- 82°F
- Normal low
- 64°F
- Wet days
- 1
- 0.08 in total
- Muggy days
- 2
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 84°F | 80°F |
| Normal low | 65°F | 62°F |
| Chance of a wet day | 1% | 3% |
| Sunrise / sunset | 6:26 am / 7:18 pm | 6:46 am / 6:38 pm |
| Daylight | 12.9 h | 11.9 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical September day
- 6 am65°Fdew point 60°F
- 9 am72°Fdew point 60°F
- Noon74°Fdew point 60°F
- 3 pm73°Fdew point 60°F
- 6 pm68°Fdew point 60°F
- 9 pm67°Fdew point 60°F
NOAA hourly normals (local standard time) from Los Angeles Intl Airport (17 mi away); average wind 7 mph; clear or few clouds in 53% of daytime hours, mostly cloudy or overcast in 24%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F8 of 30
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph17 of 30
- Hot dayshigh 90°F or more6 of 30
- Muggy daysdaily mean dew point 65°F or more2 of 30
- Wet daysat least 0.01 in of rain or melted snow1 of 30
- Notable rainat least 0.10 in0 of 30
- Freezing nightslow 32°F or below0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 0.08 in; a dry September brings about 0.0 in and a wet one about 0.02 in (25th and 75th percentiles). Days with half an inch or more are rare.
How September varies from year to year
- Warmest September, 1991-20201997: average high 89°F
- Coolest September1999: average high 77°F
- Wettest September2015: 0.9 in
- Driest September1992: no measurable precipitation
- Highest reading111°F (September 27, 2010)
- Lowest reading55°F (September 17, 2006)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 83°F | 82°F | 78°F |
| Normal low | 66°F | 64°F | 59°F |
| Wet days | 0 | 1 | 2 |
| Comfortable days | 5 | 8 | 17 |
| Daylight | 13.4 h | 12.4 h | 11.3 h |
Highs change by -1°F from August and -4°F into October.
Nearby alternatives in September
- Warmer: Pasadena, CA26 mi · high 90°F · 1 wet day
- Cooler: Torrance, CA10 mi · high 77°F · 1 wet day
How Long Beach ranks in September
- Normal high175th warmest of 378 cities; 42nd of 60 in California
- Wet days9th driest of 378
- Comfortable days174th most of 342
What to pack for Long Beach in September
- A swimsuit – about 17 beach days
Heating and cooling
September has 1 heating degree days and 245 cooling degree days (base 65°F), 11% of the year's total heating and cooling demand.
Questions
How hot is Long Beach in September?
The normal high is 82°F and the normal low is 64°F. From 1991 to 2020 the hottest September reading was 111°F (September 27, 2010).
Does it rain a lot in Long Beach in September?
About 1 days in September have at least 0.01 in of precipitation, and the normal total is 0.08 in. The wettest September in 1991-2020 was in 2015 (1.0 in); the driest was in 1992, with no measurable precipitation.
Is September a good time to visit Long Beach?
September ranks 11th of 12 months on our comfort score for Long Beach (60 out of 100). It has about 8 comfortable days and about 6 days at 90°F or hotter. The best month is May.
Where the numbers come from
- Temperature and rain: Long Beach Daugherty Fld (USW00023129), 4.0 mi NE of the city center, 31 ft . NOAA normals and daily records, 1991-2020.
- Snowfall, snow depth and frost dates: Torrance Airport (USW00003122), 9.1 mi WNW of the city center, 90 ft (57 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Los Angeles Intl Airport (USW00023174), 17 mi NW of the city center, 97 ft (64 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Long Beach / Daugherty Field / Airport (722970-23129), 4.0 mi NE of the city center, 33 ft . Hourly observations, 1991-2020.