S
M
T
W
T
F
S
30
87°
67°
31
90°
68°
1
93°
70°
2
85°
65°
3
82°
65°
4
81°
67°
5
72°
61°
6
75°
55°
7
77°
52°
8
74°
55°
9
83°
60°
10
76°
53°
11
75°
52°
12
81°
55°
13
67°
46°
14
68°
43°
15
77°
55°
16
68°
54°
17
68°
58°
18
66°
53°
19
61°
59°
20
65°
55°
21
61°
52°
22
61°
49°
23
64°
45°
24
67°
48°
25
66°
46°
26
66°
42°
27
69°
50°
28
70°
51°
29
70°
58°
30
69°
52°
1
69°
55°
2
68°
54°
3
67°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Belgium
Belgium's September 2026 forecast shows daily high temperatures ranging from 66° to 70°, with overnight lows between 42° and 58°. The average high for September is 68° with an average low of 51°. 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 Belgium. See also: October | November | December.
