S
M
T
W
T
F
S
30
71°
52°
31
72°
53°
1
70°
52°
2
71°
55°
3
72°
53°
4
72°
52°
5
70°
55°
6
71°
52°
7
71°
50°
8
69°
54°
9
68°
51°
10
70°
50°
11
70°
52°
12
68°
54°
13
69°
53°
14
63°
47°
15
64°
50°
16
66°
49°
17
67°
52°
18
64°
50°
19
61°
49°
20
Hist. Avg.
64°
49°
21
Hist. Avg.
64°
49°
22
Hist. Avg.
64°
48°
23
Hist. Avg.
63°
48°
24
Hist. Avg.
63°
48°
25
Hist. Avg.
63°
48°
26
Hist. Avg.
62°
48°
27
Hist. Avg.
62°
47°
28
Hist. Avg.
62°
47°
29
Hist. Avg.
61°
47°
30
Hist. Avg.
61°
47°
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 Mertzig
Mertzig's September 2026 forecast shows daily high temperatures ranging from 61° to 72°, with overnight lows between 47° and 55°. The average high for September is 69° with an average low of 52°. 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 Mertzig. See also: October | November | December.
