S
M
T
W
T
F
S
30
71°
55°
31
70°
56°
1
71°
48°
2
70°
51°
3
65°
55°
4
70°
56°
5
70°
56°
6
69°
50°
7
70°
49°
8
66°
52°
9
68°
55°
10
69°
55°
11
71°
54°
12
69°
52°
13
66°
53°
14
66°
52°
15
63°
49°
16
63°
47°
17
64°
52°
18
65°
49°
19
65°
48°
20
63°
53°
21
67°
52°
22
66°
46°
23
66°
46°
24
60°
52°
25
65°
50°
26
66°
46°
27
Hist. Avg.
61°
46°
28
Hist. Avg.
60°
45°
29
Hist. Avg.
60°
45°
30
Hist. Avg.
60°
45°
1
Hist. Avg.
60°
44°
2
Hist. Avg.
59°
44°
3
Hist. Avg.
59°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Brazil Lake
Brazil Lake's September 2026 forecast shows daily high temperatures ranging from 60° to 71°, with overnight lows between 46° and 56°. The average high for September is 67° 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 Brazil Lake. See also: October | November | December.