S
M
T
W
T
F
S
30
62°
50°
31
62°
50°
1
63°
51°
2
62°
51°
3
62°
49°
4
63°
49°
5
62°
50°
6
63°
52°
7
64°
53°
8
66°
52°
9
64°
51°
10
64°
53°
11
62°
54°
12
65°
54°
13
65°
53°
14
66°
51°
15
64°
49°
16
60°
48°
17
60°
48°
18
61°
47°
19
59°
46°
20
59°
45°
21
60°
46°
22
59°
47°
23
60°
48°
24
60°
47°
25
59°
49°
26
59°
50°
27
61°
47°
28
60°
47°
29
58°
46°
30
58°
46°
1
59°
47°
2
57°
46°
3
58°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Antrim
Antrim's September 2026 forecast shows daily high temperatures ranging from 57° to 66°, with overnight lows between 45° and 54°. The average high for September is 61° 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 Antrim. See also: October | November | December.
