S
M
T
W
T
F
S
30
77°
52°
31
75°
51°
1
74°
52°
2
75°
53°
3
73°
54°
4
73°
52°
5
74°
52°
6
75°
52°
7
73°
50°
8
72°
49°
9
72°
50°
10
73°
54°
11
72°
48°
12
71°
48°
13
73°
47°
14
74°
54°
15
74°
54°
16
73°
51°
17
71°
46°
18
70°
45°
19
70°
46°
20
74°
52°
21
70°
46°
22
69°
48°
23
72°
51°
24
73°
52°
25
74°
50°
26
73°
42°
27
71°
44°
28
65°
43°
29
64°
42°
30
65°
42°
1
66°
43°
2
64°
40°
3
Hist. Avg.
68°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Hardyston Township
Hardyston Township's September 2026 forecast shows daily high temperatures ranging from 64° to 77°, with overnight lows between 40° and 54°. The average high for September is 72° with an average low of 49°. 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 Hardyston Township. See also: October | November | December.