S
M
T
W
T
F
S
30
68°
48°
31
69°
46°
1
70°
46°
2
73°
47°
3
70°
48°
4
73°
50°
5
72°
51°
6
73°
52°
7
72°
51°
8
72°
50°
9
73°
50°
10
Hist. Avg.
67°
46°
11
Hist. Avg.
67°
46°
12
Hist. Avg.
67°
46°
13
Hist. Avg.
66°
46°
14
Hist. Avg.
66°
45°
15
Hist. Avg.
66°
45°
16
Hist. Avg.
65°
45°
17
Hist. Avg.
65°
44°
18
Hist. Avg.
65°
44°
19
Hist. Avg.
64°
44°
20
Hist. Avg.
64°
43°
21
Hist. Avg.
64°
43°
22
Hist. Avg.
63°
43°
23
Hist. Avg.
63°
42°
24
Hist. Avg.
62°
42°
25
Hist. Avg.
62°
42°
26
Hist. Avg.
62°
42°
27
Hist. Avg.
61°
41°
28
Hist. Avg.
61°
41°
29
Hist. Avg.
61°
41°
30
Hist. Avg.
60°
40°
1
Hist. Avg.
60°
40°
2
Hist. Avg.
59°
40°
3
Hist. Avg.
59°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Middlesex
Middlesex's September 2026 forecast shows daily high temperatures ranging from 68° to 73°, with overnight lows between 46° and 52°. The average high for September is 71° with an average low of 49°. 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 Middlesex. See also: October | November | December.
