S
M
T
W
T
F
S
28
68°
53°
29
66°
53°
30
66°
52°
1
68°
51°
2
69°
52°
3
73°
53°
4
80°
54°
5
82°
55°
6
78°
54°
7
77°
56°
8
78°
55°
9
81°
55°
10
82°
56°
11
76°
53°
12
80°
55°
13
74°
54°
14
73°
53°
15
74°
55°
16
74°
57°
17
75°
55°
18
82°
58°
19
83°
60°
20
81°
57°
21
78°
58°
22
75°
55°
23
75°
52°
24
74°
53°
25
74°
52°
26
81°
53°
27
83°
56°
28
78°
53°
29
79°
54°
30
82°
55°
31
76°
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 66° to 83°, with overnight lows between 51° and 60°. The average high for July is 76° with an average low of 54°. 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.
