S
M
T
W
T
F
S
30
95°
63°
31
99°
70°
1
101°
70°
2
101°
72°
3
101°
72°
4
102°
72°
5
99°
70°
6
92°
60°
7
90°
64°
8
96°
71°
9
97°
72°
10
94°
66°
11
89°
62°
12
93°
66°
13
88°
62°
14
90°
64°
15
87°
59°
16
82°
56°
17
84°
61°
18
79°
60°
19
76°
61°
20
80°
60°
21
81°
60°
22
83°
59°
23
80°
56°
24
78°
58°
25
82°
59°
26
78°
53°
27
72°
49°
28
71°
46°
29
70°
47°
30
71°
49°
1
70°
48°
2
72°
54°
3
70°
53°
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 70° to 102°, with overnight lows between 46° and 72°. The average high for September is 84° 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.
