S
M
T
W
T
F
S
30
84°
54°
31
77°
56°
1
77°
60°
2
78°
58°
3
83°
63°
4
85°
60°
5
85°
52°
6
77°
52°
7
76°
51°
8
75°
51°
9
79°
58°
10
77°
55°
11
74°
50°
12
73°
48°
13
75°
50°
14
74°
54°
15
73°
47°
16
74°
46°
17
71°
46°
18
70°
47°
19
70°
47°
20
71°
46°
21
70°
46°
22
70°
47°
23
72°
49°
24
75°
51°
25
76°
53°
26
76°
47°
27
77°
44°
28
68°
51°
29
68°
50°
30
75°
47°
1
73°
50°
2
71°
49°
3
66°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fair Oaks
Fair Oaks's September 2026 forecast shows daily high temperatures ranging from 66° to 85°, with overnight lows between 44° and 63°. The average high for September is 75° with an average low of 51°. 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 Fair Oaks. See also: October | November | December.