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
N/A
9
65°
54°
10
67°
59°
11
66°
54°
12
69°
61°
13
67°
59°
14
69°
60°
15
70°
58°
16
65°
55°
17
66°
56°
18
66°
58°
19
67°
57°
20
66°
56°
21
67°
55°
22
67°
54°
23
66°
55°
24
68°
55°
25
68°
53°
26
65°
51°
27
64°
49°
28
62°
47°
29
62°
48°
30
63°
53°
1
64°
52°
2
62°
49°
3
64°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Haarlem
Haarlem's September 2026 forecast shows daily high temperatures ranging from 62° to 70°, with overnight lows between 47° and 61°. The average high for September is 66° with an average low of 54°. 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.
