S
M
T
W
T
F
S
30
73°
56°
31
65°
58°
1
73°
60°
2
71°
57°
3
73°
60°
4
73°
54°
5
76°
52°
6
77°
55°
7
83°
52°
8
86°
55°
9
90°
60°
10
88°
66°
11
74°
59°
12
75°
55°
13
76°
53°
14
79°
53°
15
75°
53°
16
65°
59°
17
71°
62°
18
74°
55°
19
71°
58°
20
65°
57°
21
67°
57°
22
71°
57°
23
74°
57°
24
78°
54°
25
78°
58°
26
73°
57°
27
71°
57°
28
73°
56°
29
77°
55°
30
77°
54°
1
74°
55°
2
80°
54°
3
85°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Berkeley
Berkeley's September 2026 forecast shows daily high temperatures ranging from 74° to 85°, with overnight lows between 54° and 58°. The average high for September is 79° with an average low of 55°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Berkeley. See also: October | November | December.
