S
M
T
W
T
F
S
30
61°
58°
31
65°
58°
1
67°
56°
2
73°
54°
3
77°
59°
4
65°
54°
5
62°
46°
6
56°
43°
7
64°
38°
8
72°
50°
9
66°
53°
10
70°
57°
11
64°
57°
12
63°
50°
13
60°
49°
14
64°
49°
15
67°
50°
16
69°
47°
17
76°
52°
18
73°
53°
19
63°
60°
20
80°
61°
21
71°
45°
22
60°
41°
23
59°
42°
24
71°
52°
25
80°
56°
26
81°
60°
27
73°
61°
28
74°
62°
29
68°
57°
30
75°
57°
1
68°
54°
2
70°
58°
3
71°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fontoura Xavier
Fontoura Xavier's September 2026 forecast shows daily high temperatures ranging from 59° to 81°, with overnight lows between 41° and 62°. The average high for September is 71° 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 Fontoura Xavier. See also: October | November | December.