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Weather in Long Beach, California for September 2025

Your guide to Long Beach weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Beach Hazards Statement - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Long Beach has been nearly identical to the historical average, with a temperature of 27.5 °F (showing only a slight deviation of -0.3 °F).

  • Expect cooler weather in the next days in Long Beach with the forecast suggesting a temperature of 25 °F, lower than the historical average.

  • In general, the average temperature in Long Beach at the beginning of September is 28.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 24 °F by the end of September.

    • Rain 🌧️

  • Precipitation in Long Beach during September is a rare event, with an average of fewer than 2 rainy days.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
30
Dry days
Average rainy days
0
Rainy days
Average snowy days
0
Snow days
Average temperatures
25°/18°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
68 %
Avg humidity

Long Beach Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Cloudy
28°
2
Cloudy
29°
3
Overcast
30°
4
Overcast
27°
5
Overcast
29°
6
Overcast
29°
7
Mist
30°
8
Partly cloudy
31°
9
Partly cloudy
29°
10
Cloudy
26°
11
Cloudy
25°
12
Mist
25°
13
Mist
24°
14
Overcast
24°
15
Weather Alert Partly cloudy
27°
16
Partly cloudy
28°
17
Mist
26°
18
Moderate rain
24°
19
Patchy rain possible
25°
20
Sunny
26°
21
Partly cloudy
26°
22
Patchy rain possible
24°
23
Sunny
24°
24
Partly cloudy
27°
25
Partly cloudy
26°
26
Sunny
23°
27
Sunny
22°
28
Sunny
22°
29
Overcast
24°
30
Light rain shower
24°

Temperatures trend during September in Long Beach

See the weather trend as well as the moving average line

September weather in Long Beach day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Cloudy
Cloudy
 28° /19° 0 mm 7
Sept. 2 Cloudy
Cloudy
 29° /21° 0 mm 7
Sept. 3 Overcast
Overcast
 30° /21° 0 mm 7
Sept. 4 Overcast
Overcast
 27° /19° 0 mm 6
Sept. 5 Overcast
Overcast
 29° /19° 0 mm 7
Sept. 6 Overcast
Overcast
 29° /19° 0 mm 7
Sept. 7 Mist
Mist
 30° /19° 0 mm 7
Sept. 8 Partly cloudy
Partly cloudy
 31° /20° 0 mm 7
Sept. 9 Partly cloudy
Partly cloudy
 29° /21° 0 mm 7
Sept. 10 Cloudy
Cloudy
 26° /20° 0 mm 6
Sept. 11 Cloudy
Cloudy
 25° /18° 0 mm 6
Sept. 12 Mist
Mist
 25° /18° 0 mm 6
Sept. 13 Mist
Mist
 24° /18° 0 mm 5
Sept. 14 Overcast
Overcast
 24° /17° 0 mm 6
Sept. 15 Partly cloudy
Partly cloudy
 27° /18° 0 mm 1.9
Sept. 16 Partly cloudy
Partly cloudy
 28° /18° 0 mm 1.9
Sept. 17 Mist
Mist
 26° /19° 0 mm 1.6
Sept. 18 Moderate rain
Moderate rain
 24° /21° 14.1 mm 1.9
Sept. 19 Patchy rain possible
Patchy rain possible
 25° /22° 1.2 mm 0
Sept. 20 Sunny
Sunny
 26° /22° 0 mm 6
Sept. 21 Partly cloudy
Partly cloudy
 26° /21° 0 mm 6
Sept. 22 Patchy rain possible
Patchy rain possible
 24° /21° 0.7 mm 5
Sept. 23 Sunny
Sunny
 24° /20° 0 mm 6
Sept. 24 Partly cloudy
Partly cloudy
 27° /21° 0 mm 6
Sept. 25 Partly cloudy
Partly cloudy
 26° /22° 0 mm 6
Sept. 26 Sunny
Sunny
 23° /20° 0 mm 6
Sept. 27 Sunny
Sunny
 22° /18° 0 mm 6
Sept. 28 Sunny
Sunny
 22° /19° 0 mm 5
Sept. 29 Overcast
Overcast
 24° /15° 0 mm 6
Sept. 30 Light rain shower
Light rain shower
 24° /15° 0.7 mm 6
Next
Important Notice
Our weather forecast for Long Beach in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Long Beach forecast closer to your planned date for the most up-to-date weather information.
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Long Beach in September - FAQ

What are the expected maximum and minimum temperatures in Long Beach during September?
During September, expect a variety of temperatures with highs around 25° and lows near 18°, suitable for diverse activities and preferences.
How much rainfall should be expected in Long Beach during September?
Rainfall in Long Beach during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 0 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Long Beach during September?
The average wind speed in Long Beach during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Long Beach

Explore the daily rainfall trends and prepare for Long Beachs September weather 💧

UV exposure in Long Beach during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Get accurate weather forecasts for Long Beach, located at latitude 33.767 and longitude -118.189. Stay updated with localized weather information tailored for Long Beach.

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