S
M
T
W
T
F
S
30
73°
45°
31
70°
43°
1
67°
45°
2
67°
42°
3
68°
43°
4
67°
43°
5
67°
44°
6
68°
46°
7
68°
50°
8
67°
45°
9
67°
43°
10
68°
42°
11
66°
46°
12
66°
47°
13
65°
46°
14
66°
45°
15
65°
46°
16
67°
41°
17
64°
40°
18
66°
41°
19
63°
47°
20
71°
47°
21
Hist. Avg.
61°
46°
22
Hist. Avg.
61°
45°
23
Hist. Avg.
60°
45°
24
Hist. Avg.
60°
44°
25
Hist. Avg.
60°
44°
26
Hist. Avg.
59°
44°
27
Hist. Avg.
59°
43°
28
Hist. Avg.
58°
43°
29
Hist. Avg.
58°
43°
30
Hist. Avg.
57°
42°
1
Hist. Avg.
57°
42°
2
Hist. Avg.
57°
41°
3
Hist. Avg.
56°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Palmerston
Palmerston's September 2026 forecast shows daily high temperatures ranging from 63° to 73°, with overnight lows between 40° and 50°. The average high for September is 67° with an average low of 44°. 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 Palmerston. See also: October | November | December.