S
M
T
W
T
F
S
30
84°
64°
31
84°
64°
1
83°
59°
2
77°
56°
3
76°
56°
4
76°
55°
5
77°
55°
6
80°
60°
7
83°
62°
8
82°
61°
9
79°
60°
10
82°
62°
11
82°
61°
12
83°
61°
13
82°
62°
14
81°
52°
15
74°
51°
16
71°
52°
17
72°
51°
18
80°
57°
19
81°
58°
20
81°
58°
21
79°
51°
22
78°
47°
23
70°
49°
24
68°
51°
25
69°
55°
26
73°
55°
27
75°
54°
28
75°
54°
29
74°
53°
30
75°
54°
1
75°
53°
2
74°
46°
3
73°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Boonton
Boonton's September 2026 forecast shows daily high temperatures ranging from 68° to 84°, with overnight lows between 44° and 64°. The average high for September is 77° with an average low of 56°. 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 Boonton. See also: October | November | December.
