S
M
T
W
T
F
S
30
92°
65°
31
91°
64°
1
88°
67°
2
92°
65°
3
90°
64°
4
89°
63°
5
88°
63°
6
91°
66°
7
92°
66°
8
91°
65°
9
90°
66°
10
91°
65°
11
91°
66°
12
90°
66°
13
90°
65°
14
89°
65°
15
89°
64°
16
88°
63°
17
89°
63°
18
89°
61°
19
88°
62°
20
87°
63°
21
88°
63°
22
87°
62°
23
88°
61°
24
87°
62°
25
88°
58°
26
83°
59°
27
Hist. Avg.
83°
62°
28
Hist. Avg.
82°
61°
29
Hist. Avg.
82°
61°
30
Hist. Avg.
82°
60°
1
Hist. Avg.
82°
60°
2
Hist. Avg.
81°
60°
3
Hist. Avg.
81°
59°
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 83° to 92°, with overnight lows between 58° and 67°. The average high for September is 89° with an average low of 64°. 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.
