S
M
T
W
T
F
S
30
80°
54°
31
82°
51°
1
82°
45°
2
74°
44°
3
73°
47°
4
78°
53°
5
80°
54°
6
80°
46°
7
76°
45°
8
75°
48°
9
76°
52°
10
71°
52°
11
76°
51°
12
77°
50°
13
75°
50°
14
69°
43°
15
69°
42°
16
70°
40°
17
69°
46°
18
70°
43°
19
69°
49°
20
73°
50°
21
74°
45°
22
68°
38°
23
67°
43°
24
66°
46°
25
65°
39°
26
65°
41°
27
71°
46°
28
65°
43°
29
63°
45°
30
Hist. Avg.
62°
41°
1
Hist. Avg.
62°
41°
2
Hist. Avg.
61°
40°
3
Hist. Avg.
61°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Roxbury
Roxbury's September 2026 forecast shows daily high temperatures ranging from 63° to 82°, with overnight lows between 38° and 54°. The average high for September is 73° with an average low of 46°. 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 Roxbury. See also: October | November | December.