S
M
T
W
T
F
S
30
79°
54°
31
76°
55°
1
75°
53°
2
76°
51°
3
75°
52°
4
77°
57°
5
76°
59°
6
77°
56°
7
82°
57°
8
76°
58°
9
75°
53°
10
81°
50°
11
74°
50°
12
76°
52°
13
76°
50°
14
74°
56°
15
80°
57°
16
81°
57°
17
79°
56°
18
78°
47°
19
74°
46°
20
71°
48°
21
70°
52°
22
75°
54°
23
78°
55°
24
77°
54°
25
78°
45°
26
76°
43°
27
67°
43°
28
66°
44°
29
67°
44°
30
67°
42°
1
Hist. Avg.
70°
48°
2
Hist. Avg.
70°
48°
3
Hist. Avg.
69°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Altona
Altona's September 2026 forecast shows daily high temperatures ranging from 66° to 82°, with overnight lows between 42° and 59°. The average high for September is 75° with an average low of 52°. 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 Altona. See also: October | November | December.
