S
M
T
W
T
F
S
31
81°
53°
1
79°
52°
2
86°
50°
3
89°
54°
4
88°
53°
5
67°
47°
6
79°
41°
7
79°
53°
8
93°
59°
9
91°
52°
10
86°
55°
11
97°
61°
12
95°
61°
13
87°
60°
14
77°
53°
15
91°
50°
16
92°
58°
17
75°
56°
18
75°
50°
19
85°
49°
20
82°
54°
21
83°
55°
22
87°
52°
23
61°
54°
24
75°
50°
25
82°
47°
26
87°
45°
27
80°
50°
28
88°
48°
29
84°
52°
30
84°
51°
1
80°
50°
2
87°
46°
3
92°
54°
4
89°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in St. Francis
St. Francis's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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.
