S
M
T
W
T
F
S
30
87°
70°
31
90°
70°
1
93°
70°
2
95°
72°
3
95°
72°
4
93°
72°
5
97°
72°
6
97°
70°
7
81°
70°
8
88°
66°
9
90°
64°
10
90°
66°
11
91°
70°
12
81°
72°
13
90°
72°
14
91°
68°
15
82°
72°
16
88°
68°
17
90°
64°
18
92°
70°
19
90°
70°
20
86°
67°
21
89°
68°
22
81°
67°
23
79°
63°
24
78°
60°
25
76°
61°
26
77°
60°
27
77°
59°
28
77°
59°
29
79°
58°
30
78°
59°
1
81°
57°
2
76°
62°
3
77°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lawrenceville
Lawrenceville's September 2026 forecast shows daily high temperatures ranging from 76° to 92°, with overnight lows between 57° and 70°. The average high for September is 81° with an average low of 63°. 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 Lawrenceville. See also: October | November | December.
