S
M
T
W
T
F
S
30
90°
70°
31
91°
69°
1
91°
68°
2
89°
67°
3
89°
65°
4
88°
68°
5
89°
69°
6
87°
68°
7
86°
65°
8
86°
64°
9
87°
64°
10
88°
63°
11
86°
63°
12
87°
62°
13
85°
63°
14
85°
62°
15
86°
63°
16
86°
62°
17
85°
65°
18
88°
65°
19
84°
63°
20
Hist. Avg.
86°
65°
21
Hist. Avg.
86°
65°
22
Hist. Avg.
86°
65°
23
Hist. Avg.
85°
64°
24
Hist. Avg.
85°
64°
25
Hist. Avg.
85°
64°
26
Hist. Avg.
84°
63°
27
Hist. Avg.
84°
63°
28
Hist. Avg.
84°
63°
29
Hist. Avg.
84°
62°
30
Hist. Avg.
83°
62°
1
Hist. Avg.
83°
62°
2
Hist. Avg.
83°
61°
3
Hist. Avg.
82°
61°
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 84° to 91°, with overnight lows between 62° and 70°. The average high for September is 87° with an average low of 65°. 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.
