S
M
T
W
T
F
S
30
72°
52°
31
73°
54°
1
73°
59°
2
75°
59°
3
79°
60°
4
79°
59°
5
76°
58°
6
75°
57°
7
70°
57°
8
71°
56°
9
74°
57°
10
74°
56°
11
76°
56°
12
78°
57°
13
75°
57°
14
77°
56°
15
72°
53°
16
66°
50°
17
69°
54°
18
71°
54°
19
72°
53°
20
72°
55°
21
74°
51°
22
75°
50°
23
75°
47°
24
73°
48°
25
74°
39°
26
67°
51°
27
72°
52°
28
73°
53°
29
75°
45°
30
72°
37°
1
69°
39°
2
65°
44°
3
65°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Champlin
Champlin's September 2026 forecast shows daily high temperatures ranging from 65° to 79°, with overnight lows between 37° and 60°. The average high for September is 73° 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 Champlin. See also: October | November | December.