S
M
T
W
T
F
S
30
65°
46°
31
64°
47°
1
65°
51°
2
65°
51°
3
66°
46°
4
67°
47°
5
67°
50°
6
63°
48°
7
69°
51°
8
68°
51°
9
67°
49°
10
68°
51°
11
68°
51°
12
67°
49°
13
67°
44°
14
68°
46°
15
60°
49°
16
67°
43°
17
66°
41°
18
59°
43°
19
60°
48°
20
64°
47°
21
65°
48°
22
62°
47°
23
59°
43°
24
61°
40°
25
Hist. Avg.
58°
44°
26
Hist. Avg.
58°
44°
27
Hist. Avg.
57°
44°
28
Hist. Avg.
57°
43°
29
Hist. Avg.
57°
43°
30
Hist. Avg.
56°
43°
1
Hist. Avg.
56°
43°
2
Hist. Avg.
56°
42°
3
Hist. Avg.
56°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in St. Jacques
St. Jacques's September 2026 forecast shows daily high temperatures ranging from 59° to 69°, with overnight lows between 40° and 51°. The average high for September is 65° with an average low of 47°. 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. Jacques. See also: October | November | December.
