S
M
T
W
T
F
S
26
88°
57°
27
91°
57°
28
91°
58°
29
92°
60°
30
92°
59°
31
91°
59°
1
92°
58°
2
92°
59°
3
91°
58°
4
91°
58°
5
90°
59°
6
92°
58°
7
92°
58°
8
91°
57°
9
93°
56°
10
92°
57°
11
91°
56°
12
92°
55°
13
90°
56°
14
92°
59°
15
91°
55°
16
89°
59°
17
87°
55°
18
86°
52°
19
Hist. Avg.
89°
56°
20
Hist. Avg.
89°
56°
21
Hist. Avg.
89°
56°
22
Hist. Avg.
89°
56°
23
Hist. Avg.
89°
56°
24
Hist. Avg.
89°
56°
25
Hist. Avg.
89°
55°
26
Hist. Avg.
89°
55°
27
Hist. Avg.
89°
55°
28
Hist. Avg.
89°
55°
29
Hist. Avg.
89°
55°
30
Hist. Avg.
89°
55°
31
Hist. Avg.
89°
55°
1
Hist. Avg.
89°
55°
2
Hist. Avg.
89°
55°
3
Hist. Avg.
88°
55°
4
Hist. Avg.
88°
55°
5
Hist. Avg.
88°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in St. Helena
St. Helena's August 2026 forecast shows daily high temperatures ranging from 86° to 93°, with overnight lows between 52° and 60°. The average high for August is 91° 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.
