S
M
T
W
T
F
S
30
76°
60°
31
77°
58°
1
80°
55°
2
79°
50°
3
71°
54°
4
72°
58°
5
71°
53°
6
79°
49°
7
72°
47°
8
70°
47°
9
69°
54°
10
70°
56°
11
71°
55°
12
76°
51°
13
77°
46°
14
68°
46°
15
66°
44°
16
66°
46°
17
67°
45°
18
67°
44°
19
70°
41°
20
64°
43°
21
64°
51°
22
66°
44°
23
73°
50°
24
72°
51°
25
72°
52°
26
71°
51°
27
72°
47°
28
72°
41°
29
68°
46°
30
59°
47°
1
66°
46°
2
67°
49°
3
59°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in St. Francis
St. Francis's September 2026 forecast shows daily high temperatures ranging from 59° to 80°, with overnight lows between 37° and 60°. The average high for September is 70° with an average low of 49°. 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. Francis. See also: October | November | December.
