S
M
T
W
T
F
S
30
75°
53°
31
74°
52°
1
73°
54°
2
72°
53°
3
73°
51°
4
72°
49°
5
68°
48°
6
69°
52°
7
71°
50°
8
72°
51°
9
69°
50°
10
70°
47°
11
70°
47°
12
69°
48°
13
69°
49°
14
66°
49°
15
67°
46°
16
65°
45°
17
65°
44°
18
66°
45°
19
64°
47°
20
65°
46°
21
64°
45°
22
65°
46°
23
65°
48°
24
64°
47°
25
64°
47°
26
65°
49°
27
66°
50°
28
66°
50°
29
68°
48°
30
Hist. Avg.
61°
46°
1
Hist. Avg.
61°
46°
2
Hist. Avg.
61°
46°
3
Hist. Avg.
60°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Holbeach St Marks
Holbeach St Marks's September 2026 forecast shows daily high temperatures ranging from 64° to 75°, with overnight lows between 44° and 54°. The average high for September is 68° with an average low of 49°. 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 Holbeach St Marks. See also: October | November | December.