S
M
T
W
T
F
S
30
75°
65°
31
70°
60°
1
74°
57°
2
74°
56°
3
76°
58°
4
82°
66°
5
74°
58°
6
78°
50°
7
88°
63°
8
82°
64°
9
67°
55°
10
69°
47°
11
71°
50°
12
75°
56°
13
73°
62°
14
74°
62°
15
84°
59°
16
70°
48°
17
71°
55°
18
70°
52°
19
74°
56°
20
71°
49°
21
71°
50°
22
71°
48°
23
75°
49°
24
76°
50°
25
75°
50°
26
72°
47°
27
69°
44°
28
71°
46°
29
68°
52°
30
69°
51°
1
68°
52°
2
70°
52°
3
69°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Trier
Trier's September 2026 forecast shows daily high temperatures ranging from 68° to 76°, with overnight lows between 44° and 56°. The average high for September is 71° with an average low of 50°. 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 Trier. See also: October | November | December.
