S
M
T
W
T
F
S
30
79°
50°
31
79°
45°
1
78°
39°
2
70°
41°
3
69°
48°
4
74°
49°
5
75°
48°
6
76°
40°
7
72°
39°
8
71°
41°
9
74°
46°
10
67°
47°
11
74°
46°
12
74°
45°
13
72°
44°
14
65°
43°
15
64°
37°
16
63°
35°
17
64°
43°
18
66°
35°
19
63°
43°
20
66°
45°
21
68°
40°
22
68°
34°
23
62°
35°
24
61°
36°
25
59°
33°
26
64°
34°
27
66°
43°
28
66°
43°
29
Hist. Avg.
62°
40°
30
Hist. Avg.
62°
39°
1
Hist. Avg.
61°
39°
2
Hist. Avg.
61°
39°
3
Hist. Avg.
61°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Saint-Prosper-de-Dorchester
Saint-Prosper-de-Dorchester's September 2026 forecast shows daily high temperatures ranging from 59° to 79°, with overnight lows between 33° and 50°. The average high for September is 69° with an average low of 42°. 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-Prosper-de-Dorchester. See also: October | November | December.
