S
M
T
W
T
F
S
30
86°
60°
31
89°
54°
1
79°
56°
2
86°
51°
3
79°
54°
4
78°
55°
5
81°
59°
6
88°
55°
7
78°
52°
8
76°
49°
9
76°
49°
10
77°
50°
11
77°
54°
12
78°
52°
13
75°
56°
14
80°
57°
15
81°
58°
16
84°
56°
17
77°
52°
18
74°
56°
19
74°
51°
20
81°
49°
21
80°
47°
22
76°
45°
23
71°
47°
24
76°
48°
25
81°
51°
26
73°
51°
27
79°
47°
28
Hist. Avg.
76°
44°
29
Hist. Avg.
75°
44°
30
Hist. Avg.
75°
43°
1
Hist. Avg.
74°
43°
2
Hist. Avg.
74°
43°
3
Hist. Avg.
73°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Richland
Richland's September 2026 forecast shows daily high temperatures ranging from 71° to 89°, with overnight lows between 45° and 60°. The average high for September is 79° with an average low of 52°. 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. See also: October | November | December.
