S
M
T
W
T
F
S
30
83°
61°
31
83°
60°
1
82°
59°
2
83°
61°
3
84°
61°
4
84°
60°
5
83°
60°
6
83°
59°
7
84°
57°
8
77°
55°
9
79°
56°
10
80°
56°
11
82°
55°
12
76°
54°
13
69°
47°
14
67°
48°
15
67°
53°
16
69°
52°
17
68°
46°
18
72°
48°
19
77°
52°
20
77°
52°
21
76°
51°
22
77°
44°
23
77°
44°
24
72°
51°
25
71°
51°
26
74°
43°
27
75°
38°
28
66°
41°
29
69°
47°
30
68°
45°
1
65°
46°
2
63°
49°
3
71°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Renville
Renville's September 2026 forecast shows daily high temperatures ranging from 63° to 84°, with overnight lows between 38° and 61°. The average high for September is 75° 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 Renville. See also: October | November | December.