S
M
T
W
T
F
S
30
78°
56°
31
78°
57°
1
79°
57°
2
85°
56°
3
82°
45°
4
77°
45°
5
73°
47°
6
74°
52°
7
76°
50°
8
79°
53°
9
81°
53°
10
83°
52°
11
82°
50°
12
77°
47°
13
78°
48°
14
79°
50°
15
80°
52°
16
81°
53°
17
80°
50°
18
80°
47°
19
70°
39°
20
70°
40°
21
69°
44°
22
Hist. Avg.
77°
46°
23
Hist. Avg.
77°
45°
24
Hist. Avg.
76°
45°
25
Hist. Avg.
76°
44°
26
Hist. Avg.
75°
44°
27
Hist. Avg.
74°
43°
28
Hist. Avg.
74°
43°
29
Hist. Avg.
73°
42°
30
Hist. Avg.
73°
42°
1
Hist. Avg.
72°
41°
2
Hist. Avg.
72°
41°
3
Hist. Avg.
71°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in St. Francis
St. Francis's September 2026 forecast shows daily high temperatures ranging from 69° to 85°, with overnight lows between 39° and 57°. The average high for September is 78° with an average low of 50°. 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.
