S
M
T
W
T
F
S
26
92°
60°
27
90°
58°
28
91°
58°
29
90°
56°
30
91°
57°
31
91°
59°
1
90°
58°
2
92°
58°
3
92°
59°
4
91°
59°
5
91°
58°
6
90°
58°
7
91°
57°
8
91°
58°
9
90°
58°
10
91°
57°
11
91°
58°
12
90°
58°
13
90°
57°
14
89°
55°
15
86°
56°
16
88°
57°
17
90°
55°
18
90°
55°
19
89°
54°
20
88°
53°
21
86°
55°
22
86°
59°
23
87°
59°
24
87°
58°
25
88°
56°
26
86°
55°
27
84°
53°
28
85°
55°
29
86°
55°
30
86°
57°
31
87°
56°
1
86°
58°
2
89°
58°
3
91°
56°
4
86°
55°
5
85°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in St. Helena
St. Helena's August 2026 forecast shows daily high temperatures ranging from 84° to 92°, with overnight lows between 53° and 60°. The average high for August is 89° with an average low of 57°. 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. Helena. See also: September | October | November.
