S
M
T
W
T
F
S
26
82°
65°
27
82°
65°
28
83°
66°
29
83°
64°
30
84°
65°
31
79°
63°
1
77°
58°
2
77°
59°
3
78°
62°
4
79°
61°
5
81°
64°
6
83°
65°
7
85°
65°
8
85°
64°
9
84°
64°
10
84°
63°
11
83°
64°
12
84°
64°
13
83°
65°
14
86°
57°
15
79°
60°
16
81°
57°
17
76°
56°
18
81°
55°
19
80°
52°
20
76°
51°
21
75°
53°
22
76°
53°
23
76°
52°
24
77°
57°
25
79°
55°
26
81°
59°
27
83°
58°
28
84°
52°
29
76°
51°
30
74°
52°
31
73°
52°
1
73°
50°
2
74°
49°
3
74°
51°
4
76°
55°
5
74°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in St. Lucas
St. Lucas's August 2026 forecast shows daily high temperatures ranging from 73° to 86°, with overnight lows between 49° and 66°. The average high for August is 80° with an average low of 58°. 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. Lucas. See also: September | October | November.
