S
M
T
W
T
F
S
30
84°
62°
31
89°
61°
1
84°
62°
2
84°
62°
3
85°
66°
4
87°
65°
5
88°
63°
6
87°
62°
7
85°
60°
8
83°
61°
9
84°
59°
10
83°
60°
11
86°
59°
12
86°
59°
13
Hist. Avg.
83°
59°
14
Hist. Avg.
83°
58°
15
Hist. Avg.
82°
58°
16
Hist. Avg.
82°
57°
17
Hist. Avg.
82°
57°
18
Hist. Avg.
81°
56°
19
Hist. Avg.
81°
56°
20
Hist. Avg.
81°
56°
21
Hist. Avg.
80°
55°
22
Hist. Avg.
80°
55°
23
Hist. Avg.
80°
54°
24
Hist. Avg.
79°
54°
25
Hist. Avg.
79°
53°
26
Hist. Avg.
79°
53°
27
Hist. Avg.
78°
52°
28
Hist. Avg.
78°
52°
29
Hist. Avg.
78°
51°
30
Hist. Avg.
77°
51°
1
Hist. Avg.
77°
50°
2
Hist. Avg.
77°
50°
3
Hist. Avg.
76°
49°
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 83° to 89°, with overnight lows between 59° and 66°. The average high for September is 85° with an average low of 62°. 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.
