S
M
T
W
T
F
S
30
80°
46°
31
80°
50°
1
81°
49°
2
85°
46°
3
79°
50°
4
81°
53°
5
88°
54°
6
89°
45°
7
81°
47°
8
77°
48°
9
85°
46°
10
74°
45°
11
75°
52°
12
82°
50°
13
81°
53°
14
82°
51°
15
82°
47°
16
79°
41°
17
78°
40°
18
76°
39°
19
Hist. Avg.
73°
48°
20
Hist. Avg.
72°
47°
21
Hist. Avg.
72°
47°
22
Hist. Avg.
71°
47°
23
Hist. Avg.
71°
46°
24
Hist. Avg.
70°
46°
25
Hist. Avg.
70°
46°
26
Hist. Avg.
69°
45°
27
Hist. Avg.
69°
45°
28
Hist. Avg.
68°
44°
29
Hist. Avg.
68°
44°
30
Hist. Avg.
67°
44°
1
Hist. Avg.
66°
43°
2
Hist. Avg.
66°
43°
3
Hist. Avg.
65°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in St. Xavier
St. Xavier's September 2026 forecast shows daily high temperatures ranging from 74° to 89°, with overnight lows between 39° and 54°. The average high for September is 81° with an average low of 48°. 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 St. Xavier. See also: October | November | December.
