S
M
T
W
T
F
S
26
66°
61°
27
70°
59°
28
77°
64°
29
73°
61°
30
68°
55°
31
68°
50°
1
66°
55°
2
76°
60°
3
83°
61°
4
76°
60°
5
69°
56°
6
65°
51°
7
68°
55°
8
70°
54°
9
71°
56°
10
74°
58°
11
75°
58°
12
75°
59°
13
74°
59°
14
73°
58°
15
71°
58°
16
69°
57°
17
67°
56°
18
66°
53°
19
66°
52°
20
65°
52°
21
65°
51°
22
66°
51°
23
65°
52°
24
69°
56°
25
70°
56°
26
67°
54°
27
67°
51°
28
69°
55°
29
69°
54°
30
70°
56°
31
70°
56°
1
66°
54°
2
64°
52°
3
64°
51°
4
65°
51°
5
65°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in St Helens
St Helens's August 2026 forecast shows daily high temperatures ranging from 64° to 83°, with overnight lows between 51° and 61°. The average high for August is 69° 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 August weather will actually feel in St Helens. See also: September | October | November.
