Weather in San Bernardino in September

The weather in San Bernardino in September varies radically. Daytime is relatively hot since temperatures get higher than 33 degrees, while the nights are much colder and there are no more than 15 degrees. Therefore, it is recommended to pack for both warm and chilly conditions
Avg Temp
15° - 33°
Avg Rainy Days
2
Avg Dry Days
28
Avg Snow Days
0
Full weather report for today ››

Weather forecast for the next 14 days ››

Weather Facts - San Bernardino in September

* The warmest temperature recorded in in September is 42°C
* The coldest temperature recorded in San Bernardino in September is 7°C
* The average rainfall in San Bernardino in September is 2 mm

Yearly Average for San Bernardino

Max Temp
Min Temp
Rainy Days
Jan.
20°
5°
8
Feb.
20°
6°
10
March
22°
7°
8
April
24°
8°
7
May
28°
12°
4
June
32°
14°
2
July
35°
17°
1
August
35°
17°
1
Sep.
33°
15°
2
Oct.
28°
11°
5
Nov.
23°
7°
4
Dec.
19°
4°
7

Average Temperature in San Bernardino