S
M
T
W
T
F
S
30
89°
50°
31
89°
52°
1
87°
46°
2
80°
45°
3
80°
46°
4
82°
45°
5
82°
45°
6
85°
46°
7
87°
50°
8
88°
49°
9
88°
50°
10
87°
48°
11
83°
49°
12
84°
48°
13
85°
49°
14
85°
46°
15
83°
45°
16
81°
46°
17
80°
45°
18
80°
45°
19
79°
46°
20
Hist. Avg.
79°
41°
21
Hist. Avg.
79°
41°
22
Hist. Avg.
78°
40°
23
Hist. Avg.
78°
40°
24
Hist. Avg.
78°
40°
25
Hist. Avg.
77°
39°
26
Hist. Avg.
77°
39°
27
Hist. Avg.
76°
38°
28
Hist. Avg.
76°
38°
29
Hist. Avg.
75°
38°
30
Hist. Avg.
75°
37°
1
Hist. Avg.
74°
37°
2
Hist. Avg.
74°
37°
3
Hist. Avg.
74°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Richfield
Richfield's September 2026 forecast shows daily high temperatures ranging from 79° to 89°, with overnight lows between 45° and 52°. The average high for September is 84° with an average low of 47°. 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 Richfield. See also: October | November | December.