S
M
T
W
T
F
S
30
75°
57°
31
76°
57°
1
75°
54°
2
76°
55°
3
78°
55°
4
73°
56°
5
73°
56°
6
74°
53°
7
78°
57°
8
79°
57°
9
80°
58°
10
80°
58°
11
78°
57°
12
77°
57°
13
75°
56°
14
73°
55°
15
73°
55°
16
76°
57°
17
79°
59°
18
80°
57°
19
79°
56°
20
80°
57°
21
80°
57°
22
79°
56°
23
77°
56°
24
76°
55°
25
79°
56°
26
79°
57°
27
78°
57°
28
79°
56°
29
77°
53°
30
79°
56°
1
75°
53°
2
71°
49°
3
71°
49°
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 71° to 80°, with overnight lows between 49° and 59°. The average high for September is 77° with an average low of 56°. 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.
