S
M
T
W
T
F
S
30
63°
52°
31
63°
54°
1
63°
52°
2
58°
55°
3
67°
52°
4
63°
49°
5
63°
51°
6
68°
54°
7
63°
51°
8
60°
47°
9
58°
45°
10
60°
46°
11
61°
48°
12
60°
46°
13
61°
48°
14
63°
51°
15
61°
50°
16
58°
50°
17
60°
51°
18
62°
51°
19
61°
50°
20
59°
49°
21
61°
51°
22
61°
50°
23
60°
49°
24
61°
49°
25
60°
50°
26
61°
49°
27
61°
48°
28
60°
49°
29
60°
46°
30
55°
44°
1
54°
43°
2
53°
44°
3
54°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Nairn
Nairn's September 2026 forecast shows daily high temperatures ranging from 53° to 68°, with overnight lows between 43° and 55°. The average high for September is 60° with an average low of 49°. 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 Nairn. See also: October | November | December.