S
M
T
W
T
F
S
30
87°
57°
31
80°
61°
1
82°
61°
2
80°
63°
3
84°
57°
4
80°
62°
5
81°
62°
6
85°
61°
7
85°
61°
8
84°
60°
9
84°
59°
10
83°
60°
11
81°
60°
12
78°
60°
13
83°
60°
14
75°
52°
15
75°
50°
16
Hist. Avg.
80°
55°
17
Hist. Avg.
80°
55°
18
Hist. Avg.
79°
55°
19
Hist. Avg.
79°
54°
20
Hist. Avg.
78°
54°
21
Hist. Avg.
78°
53°
22
Hist. Avg.
78°
53°
23
Hist. Avg.
77°
52°
24
Hist. Avg.
77°
52°
25
Hist. Avg.
76°
52°
26
Hist. Avg.
76°
51°
27
Hist. Avg.
76°
51°
28
Hist. Avg.
75°
50°
29
Hist. Avg.
75°
50°
30
Hist. Avg.
75°
50°
1
Hist. Avg.
74°
49°
2
Hist. Avg.
74°
49°
3
Hist. Avg.
73°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Alert
Alert's September 2026 forecast shows daily high temperatures ranging from 75° to 87°, with overnight lows between 50° and 63°. The average high for September is 82° with an average low of 59°. 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 Alert. See also: October | November | December.
