S
M
T
W
T
F
S
30
80°
50°
31
75°
49°
1
73°
54°
2
77°
57°
3
74°
52°
4
72°
56°
5
71°
55°
6
78°
50°
7
75°
50°
8
74°
51°
9
71°
48°
10
71°
52°
11
72°
45°
12
70°
46°
13
69°
45°
14
71°
53°
15
74°
46°
16
70°
43°
17
67°
42°
18
66°
42°
19
65°
43°
20
65°
44°
21
66°
45°
22
64°
44°
23
64°
48°
24
69°
48°
25
69°
46°
26
70°
49°
27
70°
42°
28
69°
38°
29
61°
39°
30
60°
46°
1
61°
47°
2
66°
47°
3
65°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Roxbury
Roxbury's September 2026 forecast shows daily high temperatures ranging from 60° to 80°, with overnight lows between 38° and 57°. The average high for September is 70° with an average low of 47°. 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.