S
M
T
W
T
F
S
30
69°
41°
31
67°
44°
1
67°
43°
2
66°
44°
3
67°
42°
4
66°
41°
5
66°
42°
6
68°
45°
7
69°
46°
8
65°
48°
9
66°
47°
10
66°
46°
11
65°
48°
12
66°
48°
13
70°
43°
14
70°
49°
15
69°
44°
16
71°
48°
17
69°
47°
18
71°
45°
19
68°
41°
20
Hist. Avg.
61°
39°
21
Hist. Avg.
61°
38°
22
Hist. Avg.
61°
38°
23
Hist. Avg.
61°
38°
24
Hist. Avg.
60°
38°
25
Hist. Avg.
60°
38°
26
Hist. Avg.
60°
37°
27
Hist. Avg.
60°
37°
28
Hist. Avg.
59°
37°
29
Hist. Avg.
59°
37°
30
Hist. Avg.
59°
37°
1
Hist. Avg.
58°
36°
2
Hist. Avg.
58°
36°
3
Hist. Avg.
58°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Rossport
Rossport's September 2026 forecast shows daily high temperatures ranging from 65° to 71°, with overnight lows between 41° and 49°. The average high for September is 68° with an average low of 45°. 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 Rossport. See also: October | November | December.
