S
M
T
W
T
F
S
30
72°
61°
31
68°
59°
1
72°
54°
2
72°
52°
3
75°
61°
4
70°
56°
5
67°
49°
6
71°
54°
7
79°
59°
8
65°
52°
9
64°
49°
10
64°
52°
11
64°
53°
12
62°
50°
13
64°
49°
14
64°
50°
15
64°
50°
16
63°
51°
17
63°
47°
18
64°
47°
19
67°
52°
20
65°
51°
21
66°
50°
22
67°
51°
23
67°
51°
24
66°
50°
25
67°
52°
26
66°
51°
27
65°
51°
28
65°
50°
29
64°
50°
30
63°
47°
1
58°
44°
2
57°
44°
3
58°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Deventer
Deventer's September 2026 forecast shows daily high temperatures ranging from 57° to 79°, with overnight lows between 43° and 59°. The average high for September is 65° 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 Deventer. See also: October | November | December.
