Big Bear Lake (CA)
September
Weather in Big Bear Lake, California for September 2026
Your guide to Big Bear Lake weather in September - trends and predictions
In general, the average temperature in Big Bear Lake at the beginning of September is 26.1 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 23.6 °C by the end of September.
Big Bear Lake experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 58.2 mm.
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Temperatures
Rain 🌧️
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24
Dry days
6
Rainy days
0
Snow days
23°/15°
Temperatures
11 km/h
Avg max wind
41 %
Avg humidity
Big Bear Lake Weather September
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Temperatures trend during September in Big Bear Lake
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September weather in Big Bear Lake day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 28° /20° | 0 mm | 7 | |
| Sept. 2 | Sunny | 25° /18° | 16.1 mm | 6 | |
| Sept. 3 | Sunny | 25° /15° | 5.4 mm | 6 | |
| Sept. 4 | Sunny | 25° /18° | 8.9 mm | 6 | |
| Sept. 5 |  Partly cloudy | 26° /18° | 10.2 mm | 6 | |
| Sept. 6 |  Cloudy | 28° /19° | 0 mm | 7 | |
| Sept. 7 |  Patchy rain possible | 26° /17° | 0.2 mm | 6 | |
| Sept. 8 |  Patchy light drizzle | 25° /17° | 0.6 mm | 6 | |
| Sept. 9 | Patchy rain possible | 24° /14° | 0.1 mm | 6 | |
| Sept. 10 | Sunny | 22° /12° | 0 mm | 6 | |
| Sept. 11 | Sunny | 22° /10° | 0 mm | 6 | |
| Sept. 12 | Sunny | 22° /12° | 0 mm | 6 | |
| Sept. 13 | Sunny | 22° /12° | 0 mm | 6 | |
| Sept. 14 | Sunny | 25° /14° | 0 mm | 7 | |
| Sept. 15 | Sunny | 23° /14° | 0 mm | 7 | |
| Sept. 16 | Sunny | 18° /11° | 0 mm | 5 | |
| Sept. 17 | Cloudy | 20° /10° | 0 mm | 5 | |
| Sept. 18 | Sunny | 20° /11° | 0 mm | 5 | |
| Sept. 19 | Partly cloudy | 19° /9° | 0 mm | 6 | |
| Sept. 20 |  Thundery outbreaks possible | 19° /9° | 0 mm | 5 | |
| Sept. 21 | Sunny | 21° /11° | 0 mm | 5 | |
| Sept. 22 | Cloudy | 22° /15° | 0 mm | 6 | |
| Sept. 23 | Partly cloudy | 24° /18° | 2.4 mm | 6 | |
| Sept. 24 | Partly cloudy | 25° /18° | 0 mm | 7 | |
| Sept. 25 | Sunny | 24° /14° | 0 mm | 7 | |
| Sept. 26 | Sunny | 23° /13° | 0 mm | 6 | |
| Sept. 27 | Sunny | 22° /16° | 14.4 mm | 6 | |
| Sept. 28 | Sunny | 23° /15° | 0 mm | 6 | |
| Sept. 29 | Partly cloudy | 24° /15° | 0 mm | 6 | |
| Sept. 30 | Sunny | 24° /15° | 0 mm | 7 | |
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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 23° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Big Bear Lake during September?
Moderate rainfall is anticipated in Big Bear Lake during September, with a total of 58.2 mm spread over approximately 6 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Big Bear Lake during September?
The average wind speed in Big Bear Lake during September is 11 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 💧
Typically, Big Bear Lake has 6 rainy days in September with a total of 58.2 mm of rainfall.
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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