S
M
T
W
T
F
S
30
86°
65°
31
88°
70°
1
92°
72°
2
95°
75°
3
92°
70°
4
86°
64°
5
80°
64°
6
80°
64°
7
79°
60°
8
75°
59°
9
81°
63°
10
82°
61°
11
79°
58°
12
75°
57°
13
74°
58°
14
76°
56°
15
78°
60°
16
76°
60°
17
77°
57°
18
72°
52°
19
75°
58°
20
79°
60°
21
79°
60°
22
78°
59°
23
79°
59°
24
79°
58°
25
78°
57°
26
77°
56°
27
78°
57°
28
77°
57°
29
76°
56°
30
75°
54°
1
73°
54°
2
75°
55°
3
75°
55°
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 72° to 95°, with overnight lows between 52° and 75°. The average high for September is 79° with an average low of 60°. 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.
