S
M
T
W
T
F
S
30
80°
48°
31
86°
45°
1
85°
55°
2
79°
60°
3
72°
54°
4
76°
46°
5
76°
52°
6
72°
50°
7
79°
51°
8
81°
44°
9
87°
45°
10
90°
51°
11
78°
49°
12
79°
57°
13
63°
52°
14
73°
48°
15
73°
49°
16
78°
48°
17
81°
51°
18
82°
54°
19
84°
55°
20
83°
54°
21
78°
53°
22
79°
52°
23
80°
52°
24
79°
53°
25
80°
49°
26
69°
54°
27
69°
47°
28
67°
46°
29
68°
48°
30
67°
47°
1
66°
44°
2
70°
47°
3
65°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Richland Airport
Richland Airport's September 2026 forecast shows daily high temperatures ranging from 63° to 84°, with overnight lows between 41° and 57°. The average high for September is 74° with an average low of 50°. 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 Richland Airport. See also: October | November | December.
