S
M
T
W
T
F
S
30
53°
46°
31
54°
46°
1
50°
45°
2
52°
45°
3
55°
48°
4
56°
46°
5
51°
39°
6
47°
41°
7
51°
43°
8
54°
41°
9
49°
41°
10
49°
43°
11
52°
41°
12
52°
44°
13
51°
37°
14
46°
37°
15
50°
44°
16
51°
42°
17
54°
44°
18
51°
45°
19
54°
46°
20
54°
48°
21
56°
48°
22
52°
46°
23
53°
46°
24
53°
46°
25
54°
46°
26
54°
47°
27
55°
45°
28
55°
41°
29
55°
41°
30
53°
39°
1
52°
38°
2
52°
38°
3
53°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Haleakala National Park
Haleakala National Park's September 2026 forecast shows daily high temperatures ranging from 52° to 55°, with overnight lows between 38° and 47°. The average high for September is 54° with an average low of 42°. 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 Haleakala National Park. See also: October | November | December.
