S
M
T
W
T
F
S
30
78°
64°
31
87°
61°
1
82°
55°
2
85°
62°
3
88°
66°
4
82°
64°
5
79°
62°
6
80°
63°
7
83°
64°
8
81°
64°
9
77°
54°
10
79°
47°
11
85°
60°
12
71°
47°
13
68°
45°
14
59°
40°
15
70°
47°
16
72°
42°
17
69°
53°
18
61°
55°
19
61°
54°
20
64°
49°
21
60°
44°
22
64°
40°
23
68°
43°
24
67°
53°
25
71°
57°
26
62°
56°
27
69°
51°
28
70°
49°
29
65°
61°
30
75°
58°
1
66°
45°
2
63°
35°
3
65°
51°
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 ° 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.
