S
M
T
W
T
F
S
30
78°
56°
31
77°
56°
1
76°
57°
2
77°
60°
3
77°
57°
4
78°
56°
5
78°
54°
6
77°
56°
7
76°
52°
8
77°
53°
9
76°
60°
10
76°
54°
11
75°
52°
12
75°
53°
13
76°
55°
14
78°
56°
15
79°
58°
16
81°
58°
17
81°
57°
18
80°
57°
19
79°
56°
20
78°
49°
21
72°
53°
22
72°
55°
23
75°
55°
24
76°
56°
25
77°
52°
26
76°
47°
27
71°
48°
28
69°
48°
29
69°
48°
30
68°
46°
1
Hist. Avg.
71°
49°
2
Hist. Avg.
71°
49°
3
Hist. Avg.
70°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in National
National's September 2026 forecast shows daily high temperatures ranging from 68° to 81°, with overnight lows between 46° and 60°. The average high for September is 76° with an average low of 54°. 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 National. See also: October | November | December.
