S
M
T
W
T
F
S
30
71°
47°
31
70°
48°
1
69°
49°
2
69°
46°
3
72°
51°
4
75°
51°
5
69°
50°
6
71°
52°
7
75°
50°
8
74°
55°
9
75°
55°
10
75°
46°
11
73°
44°
12
65°
43°
13
64°
43°
14
63°
41°
15
62°
41°
16
63°
43°
17
65°
42°
18
66°
48°
19
70°
42°
20
66°
41°
21
63°
40°
22
59°
40°
23
70°
50°
24
70°
39°
25
61°
38°
26
Hist. Avg.
64°
41°
27
Hist. Avg.
63°
41°
28
Hist. Avg.
63°
40°
29
Hist. Avg.
62°
40°
30
Hist. Avg.
62°
40°
1
Hist. Avg.
62°
39°
2
Hist. Avg.
61°
39°
3
Hist. Avg.
61°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Long Prairie
Long Prairie's September 2026 forecast shows daily high temperatures ranging from 59° to 75°, with overnight lows between 38° and 55°. The average high for September is 68° with an average low of 46°. 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 Long Prairie. See also: October | November | December.