S
M
T
W
T
F
S
30
81°
51°
31
83°
52°
1
70°
58°
2
73°
62°
3
77°
61°
4
84°
63°
5
77°
56°
6
74°
49°
7
82°
44°
8
79°
51°
9
72°
49°
10
86°
60°
11
76°
47°
12
78°
41°
13
68°
61°
14
71°
43°
15
70°
51°
16
77°
59°
17
75°
60°
18
75°
49°
19
69°
49°
20
70°
45°
21
64°
44°
22
67°
46°
23
66°
47°
24
69°
46°
25
68°
47°
26
70°
44°
27
63°
48°
28
73°
48°
29
72°
45°
30
64°
42°
1
63°
44°
2
65°
46°
3
69°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Hopkinton
Hopkinton's September 2026 forecast shows daily high temperatures ranging from 63° to 77°, with overnight lows between 42° and 61°. The average high for September is 69° with an average low of 48°. 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 Hopkinton. See also: October | November | December.
