S
M
T
W
T
F
S
28
76°
57°
29
77°
55°
30
71°
54°
1
74°
65°
2
74°
69°
3
86°
71°
4
83°
67°
5
76°
62°
6
71°
61°
7
69°
61°
8
72°
61°
9
75°
65°
10
76°
64°
11
77°
66°
12
76°
66°
13
77°
64°
14
75°
65°
15
76°
61°
16
72°
61°
17
72°
65°
18
73°
66°
19
73°
66°
20
74°
65°
21
73°
67°
22
74°
67°
23
74°
66°
24
75°
67°
25
74°
67°
26
74°
66°
27
76°
67°
28
77°
66°
29
77°
66°
30
78°
68°
31
79°
68°
1
78°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Nantucket
Nantucket's July 2026 forecast shows daily high temperatures ranging from 69° to 86°, with overnight lows between 61° and 71°. The average high for July is 75° with an average low of 65°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Nantucket. See also: August | September | October.
