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Big Bear Lake (CA)
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Weather in Big Bear Lake, California for September 2025

Your guide to Big Bear Lake weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Big Bear Lake is cooler than usual, with temperatures averaging 22.3 °F, this is -2.3 °F below the typical seasonal average.

  • The forecast for the next days in Big Bear Lake predicts a temperature of 20.4 °F, which is cooler than the historical average.

  • In general, the average temperature in Big Bear Lake at the beginning of September is 26.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.7 °F by the end of September.

    • Rain 🌧️

  • Precipitation in Big Bear Lake 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
29
Dry days
Average rainy days
1
Rainy days
Average snowy days
0
Snow days
Average temperatures
24°/16°
Temperatures
Average wind speed
12 km/h
Avg max wind
Average humidity
32 %
Avg humidity

Big Bear Lake Weather September

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

Temperatures trend during September in Big Bear Lake

See the weather trend as well as the moving average line

September weather in Big Bear Lake day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Sunny
Sunny
 28° /20° 0 mm 7
Sept. 2 Sunny
Sunny
 25° /18° 16.1 mm 6
Sept. 3 Sunny
Sunny
 25° /15° 5.4 mm 6
Sept. 4 Sunny
Sunny
 25° /18° 8.9 mm 6
Sept. 5 Partly cloudy
Partly cloudy
 26° /18° 10.2 mm 6
Sept. 6 Cloudy
Cloudy
 28° /19° 0 mm 7
Sept. 7 Patchy rain possible
Patchy rain possible
 26° /17° 0.2 mm 6
Sept. 8 Patchy light drizzle
Patchy light drizzle
 25° /17° 0.6 mm 6
Sept. 9 Patchy rain possible
Patchy rain possible
 24° /14° 0.1 mm 6
Sept. 10 Sunny
Sunny
 22° /12° 0 mm 6
Sept. 11 Sunny
Sunny
 22° /10° 0 mm 6
Sept. 12 Sunny
Sunny
 22° /12° 0 mm 6
Sept. 13 Sunny
Sunny
 22° /12° 0 mm 6
Sept. 14 Sunny
Sunny
 25° /14° 0 mm 7
Sept. 15 Sunny
Sunny
 27° /17° 0 mm 2.2
Sept. 16 Sunny
Sunny
 27° /20° 0 mm 2.1
Sept. 17 Overcast
Overcast
 23° /18° 0 mm 1.7
Sept. 18 Moderate rain
Moderate rain
 20° /14° 8.9 mm 1.8
Sept. 19 Moderate rain
Moderate rain
 16° /13° 7.3 mm 0
Sept. 20 Patchy rain possible
Patchy rain possible
 21° /15° 0.1 mm 4
Sept. 21 Sunny
Sunny
 23° /16° 0 mm 5
Sept. 22 Patchy rain possible
Patchy rain possible
 20° /12° 1.6 mm 4
Sept. 23 Sunny
Sunny
 20° /11° 0 mm 5
Sept. 24 Partly cloudy
Partly cloudy
 24° /15° 0 mm 5
Sept. 25 Cloudy
Cloudy
 24° /16° 0 mm 4
Sept. 26 Sunny
Sunny
 22° /11° 0 mm 5
Sept. 27 Sunny
Sunny
 11° /5° 0 mm 3
Sept. 28 Patchy rain possible
Patchy rain possible
 8° /4° 1.9 mm 2
Sept. 29 Partly cloudy
Partly cloudy
 28° /19° 0 mm 7
Sept. 30 Sunny
Sunny
 28° /20° 0 mm 7
Next
Important Notice
Our weather forecast for Big Bear Lake 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 Big Bear Lake forecast closer to your planned date for the most up-to-date weather information.
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Big Bear Lake in September - FAQ

What are the expected maximum and minimum temperatures in Big Bear Lake during September?
During September, expect a variety of temperatures with highs around 24° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Big Bear Lake during September?
Rainfall in Big Bear Lake during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 1 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 Big Bear Lake during September?
The average wind speed in Big Bear Lake during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Big Bear Lake

Explore the daily rainfall trends and prepare for Big Bear Lakes September weather 💧

UV exposure in Big Bear Lake during September

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

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Location coordinates Where is Big Bear Lake?

Get accurate weather forecasts for Big Bear Lake, located at latitude 34.244 and longitude -116.911. Stay updated with localized weather information tailored for Big Bear Lake.

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