Weather in Big Bear Lake, California for September 2026
Until now, September 2026 in Big Bear Lake has been nearly identical to the historical average, with a temperature of 23.4 °F (showing only a slight deviation of 0.1 °F).
The forecast for the upcoming days in Big Bear Lake predicts a temperature of 24.7 °F, which is slightly above the historical average.
In general, the average temperature in Big Bear Lake at the beginning of September is 24.7 °F. As the month progressed, temperatures tended to slightly increase, reaching an average of 24.9 °F 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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Big Bear Lake Weather September
Temperatures trend during September in Big Bear Lake
September weather in Big Bear Lake day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 26° /17° | 0 mm | 8 | |
| Sept. 2 | Sunny | 24° /15° | 10.7 mm | 8 | |
| Sept. 3 | Sunny | 24° /14° | 3.6 mm | 8 | |
| Sept. 4 | Sunny | 24° /15° | 5.9 mm | 8 | |
| Sept. 5 |  Partly cloudy | 26° /16° | 6.8 mm | 8 | |
| Sept. 6 |  Cloudy | 24° /17° | 9.4 mm | 5 | |
| Sept. 7 |  Patchy rain possible | 25° /16° | 0.7 mm | 5 | |
| Sept. 8 |  Patchy light drizzle | 25° /17° | 1.1 mm | 6 | |
| Sept. 9 | Patchy rain possible | 25° /15° | 3 mm | 7 | |
| Sept. 10 | Sunny | 24° /13° | 1.6 mm | 8 | |
| Sept. 11 | Sunny | 23° /12° | 0.1 mm | 8 | |
| Sept. 12 | Partly cloudy | 23° /13° | 0 mm | 8 | |
| Sept. 13 | Sunny | 23° /13° | 0 mm | 7 | |
| Sept. 14 | Sunny | 25° /14° | 0 mm | 8 | |
| Sept. 15 | Sunny | 23° /14° | 0 mm | 8 | |
| Sept. 16 | Sunny | 19° /11° | 0 mm | 6 | |
| Sept. 17 | Cloudy | 21° /10° | 0 mm | 6 | |
| Sept. 18 | Sunny | 21° /11° | 0 mm | 7 | |
| Sept. 19 | Sunny | 21° /10° | 0 mm | 7 | |
| Sept. 20 |  Thundery outbreaks possible | 21° /10° | 0 mm | 4 | |
| Sept. 21 | Sunny | 20° /11° | 0 mm | 8.7 | |
| Sept. 22 | Sunny | 22° /11° | 0 mm | 8.5 | |
| Sept. 23 | Sunny | 25° /14° | 0 mm | 8.4 | |
| Sept. 24 | Sunny | 25° /17° | 0.4 mm | 7.8 | |
| Sept. 25 |  Overcast | 25° /16° | 0 mm | 7.4 | |
| Sept. 26 | Overcast | 25° /16° | 0 mm | 6 | |
| Sept. 27 | Sunny | 23° /13° | 0 mm | 6 | |
| Sept. 28 | Sunny | 24° /13° | 0 mm | 6 | |
| Sept. 29 | Sunny | 26° /15° | 0 mm | 7 | |
| Sept. 30 | Sunny | 26° /15° | 0 mm | 7 | |
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Big Bear Lake in September - FAQ
What are the expected maximum and minimum temperatures in Big Bear Lake during September?
How much rainfall should be expected in Big Bear Lake during September?
What are the typical wind conditions in Big Bear Lake during September?
September rainfall patterns in Big Bear Lake
UV exposure in Big Bear Lake during September
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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.