S
M
T
W
T
F
S
30
87°
67°
31
N/A
1
92°
68°
2
93°
68°
3
94°
70°
4
92°
68°
5
86°
68°
6
86°
66°
7
83°
67°
8
85°
66°
9
87°
65°
10
85°
63°
11
84°
59°
12
83°
60°
13
84°
62°
14
81°
63°
15
81°
62°
16
75°
62°
17
75°
61°
18
78°
61°
19
80°
60°
20
81°
61°
21
80°
58°
22
81°
56°
23
81°
59°
24
80°
60°
25
81°
59°
26
80°
59°
27
78°
60°
28
76°
59°
29
80°
58°
30
80°
57°
1
79°
55°
2
78°
55°
3
78°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Harlan
Harlan's September 2026 forecast shows daily high temperatures ranging from 75° to 94°, with overnight lows between 55° and 70°. The average high for September is 82° with an average low of 62°. 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 Harlan. See also: October | November | December.
