S
M
T
W
T
F
S
26
78°
61°
27
77°
61°
28
73°
61°
29
74°
57°
30
75°
61°
31
77°
56°
1
79°
60°
2
78°
61°
3
79°
55°
4
78°
54°
5
73°
55°
6
73°
60°
7
77°
59°
8
80°
53°
9
74°
53°
10
77°
59°
11
79°
52°
12
74°
52°
13
72°
60°
14
79°
61°
15
77°
53°
16
78°
51°
17
71°
51°
18
71°
50°
19
72°
52°
20
76°
53°
21
69°
51°
22
69°
56°
23
77°
57°
24
75°
52°
25
76°
49°
26
68°
48°
27
67°
48°
28
68°
49°
29
67°
49°
30
69°
56°
31
70°
57°
1
76°
57°
2
75°
54°
3
74°
48°
4
72°
54°
5
73°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in St. Agatha
St. Agatha's August 2026 forecast shows daily high temperatures ranging from 67° to 80°, with overnight lows between 45° and 61°. The average high for August is 74° 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. Agatha. See also: September | October | November.