S
M
T
W
T
F
S
30
86°
63°
31
87°
61°
1
85°
54°
2
82°
60°
3
82°
54°
4
76°
53°
5
78°
52°
6
83°
59°
7
83°
51°
8
77°
51°
9
77°
58°
10
76°
59°
11
83°
58°
12
84°
59°
13
84°
56°
14
85°
57°
15
84°
58°
16
74°
51°
17
74°
55°
18
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19
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20
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21
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22
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23
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24
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25
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26
Hist. Avg.
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27
Hist. Avg.
N/A
28
Hist. Avg.
N/A
29
Hist. Avg.
N/A
30
Hist. Avg.
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1
Hist. Avg.
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2
Hist. Avg.
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3
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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 74° to 87°, with overnight lows between 51° and 63°. The average high for September is 81° with an average low of 56°. 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.
