S
M
T
W
T
F
S
28
81°
49°
29
84°
62°
30
89°
71°
1
89°
69°
2
85°
68°
3
87°
67°
4
82°
-100°
5
81°
54°
6
83°
53°
7
88°
57°
8
89°
63°
9
78°
56°
10
79°
53°
11
79°
54°
12
78°
56°
13
79°
58°
14
80°
59°
15
83°
59°
16
82°
58°
17
81°
56°
18
75°
58°
19
76°
60°
20
73°
53°
21
73°
53°
22
74°
54°
23
76°
59°
24
78°
59°
25
79°
60°
26
79°
60°
27
74°
59°
28
81°
61°
29
81°
61°
30
80°
60°
31
81°
61°
1
81°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in St. Helen
St. Helen's July 2026 forecast shows daily high temperatures ranging from 73° to 89°, with overnight lows between 53° and 63°. The average high for July is 79° with an average low of 58°. 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. Helen. See also: August | September | October.
