S
M
T
W
T
F
S
30
81°
62°
31
81°
59°
1
79°
59°
2
79°
54°
3
72°
54°
4
81°
54°
5
77°
59°
6
82°
59°
7
72°
66°
8
75°
59°
9
73°
55°
10
84°
55°
11
73°
54°
12
63°
50°
13
64°
41°
14
59°
41°
15
68°
41°
16
64°
34°
17
68°
48°
18
72°
50°
19
70°
50°
20
63°
46°
21
68°
39°
22
68°
36°
23
64°
48°
24
70°
57°
25
64°
59°
26
64°
61°
27
70°
46°
28
61°
50°
29
75°
55°
30
70°
46°
1
61°
41°
2
64°
37°
3
70°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Park River
Park River's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Park River. See also: October | November | December.