S
M
T
W
T
F
S
28
68°
54°
29
63°
54°
30
66°
54°
1
69°
54°
2
72°
44°
3
78°
56°
4
77°
57°
5
81°
54°
6
86°
54°
7
80°
59°
8
76°
53°
9
78°
54°
10
76°
53°
11
74°
51°
12
79°
54°
13
83°
56°
14
86°
58°
15
83°
58°
16
85°
56°
17
84°
57°
18
85°
58°
19
80°
56°
20
78°
54°
21
80°
55°
22
82°
56°
23
83°
58°
24
83°
57°
25
79°
52°
26
78°
52°
27
82°
54°
28
80°
54°
29
77°
57°
30
77°
55°
31
82°
56°
1
82°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in St. Helens
St. Helens's July 2026 forecast shows daily high temperatures ranging from 74° to 86°, with overnight lows between 51° and 59°. The average high for July is 81° with an average low of 55°. 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 St. Helens. See also: August | September | October.
