S
M
T
W
T
F
S
26
90°
50°
27
89°
50°
28
93°
52°
29
93°
55°
30
93°
52°
31
97°
52°
1
97°
56°
2
103°
56°
3
100°
57°
4
94°
58°
5
90°
55°
6
94°
56°
7
96°
58°
8
100°
58°
9
101°
58°
10
89°
57°
11
90°
57°
12
86°
56°
13
87°
57°
14
86°
56°
15
87°
57°
16
87°
56°
17
89°
57°
18
89°
56°
19
85°
57°
20
85°
56°
21
89°
58°
22
89°
58°
23
87°
57°
24
90°
59°
25
90°
59°
26
91°
58°
27
90°
59°
28
91°
59°
29
89°
58°
30
88°
59°
31
88°
58°
1
87°
57°
2
89°
58°
3
90°
58°
4
87°
57°
5
86°
58°
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 85° to 101°, with overnight lows between 55° and 59°. 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.
