S
M
T
W
T
F
S
28
64°
52°
29
64°
52°
30
66°
57°
1
63°
55°
2
63°
55°
3
61°
54°
4
61°
57°
5
61°
57°
6
61°
57°
7
64°
57°
8
77°
57°
9
72°
55°
10
79°
54°
11
66°
61°
12
72°
54°
13
69°
48°
14
74°
50°
15
79°
52°
16
80°
54°
17
76°
54°
18
74°
53°
19
72°
52°
20
70°
54°
21
69°
53°
22
71°
55°
23
68°
55°
24
67°
55°
25
66°
53°
26
63°
51°
27
63°
52°
28
64°
52°
29
63°
54°
30
64°
52°
31
65°
54°
1
65°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Helensburgh
Helensburgh's July 2026 forecast shows daily high temperatures ranging from 63° to 80°, with overnight lows between 48° and 55°. The average high for July is 69° with an average low of 53°. 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 Helensburgh. See also: August | September | October.
