S
M
T
W
T
F
S
30
91°
68°
31
87°
66°
1
87°
66°
2
88°
67°
3
89°
69°
4
91°
63°
5
87°
62°
6
84°
63°
7
85°
64°
8
89°
69°
9
91°
63°
10
84°
62°
11
86°
62°
12
86°
60°
13
83°
59°
14
82°
58°
15
83°
59°
16
84°
59°
17
85°
60°
18
87°
60°
19
90°
56°
20
83°
57°
21
Hist. Avg.
82°
58°
22
Hist. Avg.
82°
58°
23
Hist. Avg.
82°
57°
24
Hist. Avg.
81°
57°
25
Hist. Avg.
81°
56°
26
Hist. Avg.
80°
56°
27
Hist. Avg.
80°
55°
28
Hist. Avg.
79°
55°
29
Hist. Avg.
79°
55°
30
Hist. Avg.
78°
54°
1
Hist. Avg.
78°
54°
2
Hist. Avg.
78°
53°
3
Hist. Avg.
77°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Carnegie
Carnegie's September 2026 forecast shows daily high temperatures ranging from 82° to 91°, with overnight lows between 56° and 69°. The average high for September is 86° 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 Carnegie. See also: October | November | December.
