S
M
T
W
T
F
S
30
76°
57°
31
65°
57°
1
70°
55°
2
74°
58°
3
71°
57°
4
75°
52°
5
75°
55°
6
76°
52°
7
82°
54°
8
82°
58°
9
83°
57°
10
83°
56°
11
82°
57°
12
78°
56°
13
78°
57°
14
77°
54°
15
77°
56°
16
73°
55°
17
79°
56°
18
79°
54°
19
72°
51°
20
75°
56°
21
76°
53°
22
78°
53°
23
73°
54°
24
71°
50°
25
70°
50°
26
71°
51°
27
70°
50°
28
70°
50°
29
72°
51°
30
71°
54°
1
70°
50°
2
71°
52°
3
78°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Orinda
Orinda's September 2026 forecast shows daily high temperatures ranging from 70° to 83°, with overnight lows between 50° and 58°. The average high for September is 75° 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 September weather will actually feel in Orinda. See also: October | November | December.
