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
88°
61°
7
83°
54°
8
76°
51°
9
77°
55°
10
75°
57°
11
74°
53°
12
79°
54°
13
83°
54°
14
83°
56°
15
85°
57°
16
83°
56°
17
84°
57°
18
81°
56°
19
83°
57°
20
79°
58°
21
80°
55°
22
82°
56°
23
83°
58°
24
75°
52°
25
82°
56°
26
83°
57°
27
83°
59°
28
84°
59°
29
83°
54°
30
81°
57°
31
75°
52°
1
76°
52°
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 85°, with overnight lows between 51° and 59°. The average high for July is 80° with an average low of 56°. 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.
