S
M
T
W
T
F
S
30
74°
50°
31
72°
47°
1
74°
48°
2
74°
54°
3
77°
60°
4
74°
60°
5
69°
56°
6
72°
53°
7
78°
49°
8
70°
48°
9
69°
48°
10
70°
56°
11
66°
48°
12
73°
46°
13
75°
58°
14
65°
44°
15
64°
39°
16
74°
57°
17
70°
52°
18
65°
48°
19
60°
42°
20
60°
46°
21
58°
45°
22
63°
43°
23
65°
41°
24
70°
37°
25
73°
42°
26
70°
49°
27
66°
49°
28
59°
46°
29
62°
47°
30
69°
57°
1
71°
53°
2
68°
49°
3
67°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Saint-Germain-de-Grantham
Saint-Germain-de-Grantham's September 2026 forecast shows daily high temperatures ranging from 59° to 73°, with overnight lows between 37° and 57°. The average high for September is 68° with an average low of 48°. 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 Saint-Germain-de-Grantham. See also: October | November | December.
