S
M
T
W
T
F
S
30
81°
67°
31
86°
67°
1
86°
69°
2
85°
68°
3
78°
70°
4
82°
66°
5
77°
61°
6
80°
53°
7
78°
59°
8
78°
68°
9
81°
54°
10
75°
53°
11
79°
57°
12
76°
56°
13
68°
54°
14
69°
51°
15
69°
50°
16
74°
54°
17
75°
53°
18
72°
51°
19
71°
48°
20
74°
54°
21
68°
53°
22
68°
53°
23
71°
52°
24
73°
53°
25
73°
53°
26
70°
52°
27
72°
53°
28
73°
54°
29
72°
53°
30
72°
53°
1
68°
49°
2
62°
44°
3
59°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Markesan
Markesan's September 2026 forecast shows daily high temperatures ranging from 59° to 81°, with overnight lows between 40° and 68°. The average high for September is 72° with an average low of 53°. 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 Markesan. See also: October | November | December.
