S
M
T
W
T
F
S
30
85°
60°
31
86°
63°
1
84°
60°
2
85°
62°
3
83°
62°
4
83°
61°
5
82°
61°
6
82°
60°
7
81°
60°
8
81°
59°
9
80°
59°
10
81°
58°
11
82°
59°
12
82°
59°
13
81°
60°
14
82°
59°
15
80°
59°
16
80°
58°
17
79°
58°
18
77°
55°
19
75°
47°
20
71°
52°
21
71°
56°
22
72°
47°
23
71°
47°
24
69°
49°
25
71°
53°
26
74°
51°
27
69°
48°
28
69°
46°
29
67°
46°
30
68°
47°
1
67°
53°
2
69°
51°
3
69°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lake Parsippany
Lake Parsippany's September 2026 forecast shows daily high temperatures ranging from 67° to 86°, with overnight lows between 43° and 63°. The average high for September is 77° with an average low of 55°. 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 Lake Parsippany. See also: October | November | December.
