S
M
T
W
T
F
S
27
89°
59°
28
86°
54°
29
86°
58°
30
84°
59°
1
83°
57°
2
82°
55°
3
82°
57°
4
89°
60°
5
89°
61°
6
90°
61°
7
89°
60°
8
89°
60°
9
88°
59°
10
87°
59°
11
88°
60°
12
87°
59°
13
86°
55°
14
78°
50°
15
77°
50°
16
77°
52°
17
78°
52°
18
77°
50°
19
76°
49°
20
78°
54°
21
82°
55°
22
81°
54°
23
80°
56°
24
76°
54°
25
77°
52°
26
77°
46°
27
76°
46°
28
76°
47°
29
75°
45°
30
75°
47°
31
77°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in San Bernardino
San Bernardino's October 2026 forecast shows daily high temperatures ranging from 75° to 90°, with overnight lows between 45° and 61°. The average high for October is 82° with an average low of 54°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in San Bernardino. See also: November | December | January.
