Big Bear Lake
California, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Big Bear Lake, CA

A view of Big Bear Lake, California, the USA with close rocks amid trees and mountains in the distance
A view of Big Bear Lake, California, the USA with close rocks amid trees and mountains in the distance
The first month of the autumn, September, is still a warm month in Big Bear Lake, California, with average temperature ranging between min 41.5°F (5.3°C) and max 74.1°F (23.4°C).

Temperature

In Big Bear Lake, the average high-temperature marginally drops, from a moderately hot 79.9°F (26.6°C) in August, to a still warm 74.1°F (23.4°C). The average low-temperature, in Big Bear Lake, California, is 41.5°F (5.3°C).

Rainfall

In Big Bear Lake, during September, the rain falls for 2.2 days and regularly aggregates up to 0.4" (10.7mm) of precipitation. Throughout the year, in Big Bear Lake, there are 43.5 rainfall days, and 20.1" (509.3mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, September through December.

Daylight

The average length of the day in September in Big Bear Lake is 12.4h.

What is the temperature in September in Big Bear Lake?

The average high-temperature, in September, is 74.1°F (23.4°C), while the average low-temperature is 41.5°F (5.3°C).

How many days does it rain in September in Big Bear Lake?

In September, in Big Bear Lake, California, the rain falls for 2.2 days. Throughout September, 0.4" (10.7mm) of precipitation is accumulated.

When does it start to snow in Big Bear Lake?

September is the first month it typically snows in Big Bear Lake, California. Throughout September, Big Bear Lake receives 0.1" (2.5mm) of snow.

What is the average length of the day in September in Big Bear Lake?

In Big Bear Lake, the average length of the day in September is 12.4h.
Average temperature in September - Big Bear Lake, CA
  • Average high temperature in September: 74.1°F

The warmest month (with the highest average high temperature) is July (81.2°F).
The month with the lowest average high temperature is January (47°F).

  • Average low temperature in September: 41.6°F

The month with the highest average low temperature is July (48.2°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).

Average rainfall in September - Big Bear Lake, CA
  • Average rainfall in September: 0.4"

The wettest month (with the highest rainfall) is January (4.5").
The driest month (with the lowest rainfall) is June (0.2").

Average rainfall days in September - Big Bear Lake, CA
  • Average rainfall days in September: 2.2 days

Months with the highest number of rainy days are January and February (6.3 days).
The month with the lowest number of rainy days is June (0.8 days).

Average snowfall in September - Big Bear Lake, CA
  • Average snowfall in September: 0.1"

The month with the highest snowfall is February (18.1").
Months with the lowest snowfall are June, July and August (0").

Average snowfall days in September - Big Bear Lake, CA
  • Average snowfall days in September: 0 days

Months with the highest number of snowfall days are January and February (3.8 days).
Months with the lowest number of snowfall days are July, August and September (0 days).

Average daylight in September - Big Bear Lake, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).