S
M
T
W
T
F
S
30
64°
42°
31
62°
45°
1
66°
49°
2
67°
45°
3
68°
48°
4
69°
41°
5
61°
38°
6
58°
36°
7
60°
39°
8
61°
40°
9
59°
40°
10
61°
39°
11
60°
37°
12
56°
36°
13
65°
43°
14
65°
41°
15
Hist. Avg.
62°
42°
16
Hist. Avg.
61°
41°
17
Hist. Avg.
61°
41°
18
Hist. Avg.
61°
41°
19
Hist. Avg.
61°
41°
20
Hist. Avg.
60°
40°
21
Hist. Avg.
60°
40°
22
Hist. Avg.
60°
40°
23
Hist. Avg.
60°
40°
24
Hist. Avg.
59°
39°
25
Hist. Avg.
59°
39°
26
Hist. Avg.
59°
39°
27
Hist. Avg.
59°
39°
28
Hist. Avg.
58°
38°
29
Hist. Avg.
58°
38°
30
Hist. Avg.
58°
38°
1
Hist. Avg.
57°
38°
2
Hist. Avg.
57°
37°
3
Hist. Avg.
57°
37°
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 56° to 69°, with overnight lows between 36° and 49°. The average high for September is 63° with an average low of 41°. 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.
