S
M
T
W
T
F
S
30
77°
64°
31
81°
68°
1
79°
59°
2
79°
50°
3
84°
55°
4
77°
61°
5
75°
59°
6
86°
63°
7
82°
66°
8
82°
68°
9
72°
55°
10
81°
50°
11
77°
63°
12
61°
55°
13
64°
39°
14
59°
41°
15
64°
50°
16
66°
36°
17
66°
46°
18
72°
45°
19
70°
54°
20
64°
45°
21
66°
37°
22
66°
34°
23
66°
39°
24
59°
54°
25
66°
57°
26
63°
54°
27
70°
45°
28
66°
43°
29
68°
57°
30
72°
54°
1
57°
46°
2
59°
45°
3
63°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Blackduck
Blackduck'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 Blackduck. See also: October | November | December.