S
M
T
W
T
F
S
30
70°
63°
31
70°
60°
1
69°
57°
2
72°
57°
3
73°
63°
4
72°
62°
5
67°
54°
6
73°
51°
7
80°
60°
8
66°
57°
9
66°
50°
10
69°
47°
11
70°
56°
12
70°
64°
13
68°
56°
14
70°
63°
15
70°
58°
16
64°
57°
17
63°
57°
18
65°
60°
19
66°
60°
20
67°
59°
21
68°
59°
22
64°
56°
23
64°
56°
24
63°
53°
25
65°
52°
26
64°
51°
27
65°
53°
28
66°
54°
29
65°
53°
30
64°
53°
1
64°
52°
2
63°
52°
3
64°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Haarlem
Haarlem's September 2026 forecast shows daily high temperatures ranging from 63° to 70°, with overnight lows between 51° and 64°. The average high for September is 66° with an average low of 56°. 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 Haarlem. See also: October | November | December.
