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
N/A
10
67°
60°
11
67°
55°
12
69°
64°
13
68°
58°
14
69°
62°
15
69°
58°
16
65°
57°
17
66°
56°
18
66°
57°
19
70°
57°
20
69°
56°
21
67°
57°
22
67°
54°
23
67°
53°
24
66°
54°
25
65°
52°
26
62°
51°
27
64°
54°
28
64°
48°
29
59°
47°
30
59°
51°
1
60°
51°
2
61°
50°
3
62°
52°
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 59° to 70°, with overnight lows between 47° and 64°. The average high for September is 65° with an average low of 55°. 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.
