S
M
T
W
T
F
S
26
80°
60°
27
78°
62°
28
70°
64°
29
71°
64°
30
73°
62°
31
78°
61°
1
73°
62°
2
72°
64°
3
68°
61°
4
79°
55°
5
80°
61°
6
81°
62°
7
80°
65°
8
80°
64°
9
N/A
10
72°
57°
11
76°
51°
12
74°
53°
13
66°
51°
14
67°
46°
15
68°
48°
16
70°
49°
17
71°
51°
18
73°
49°
19
75°
53°
20
71°
49°
21
69°
47°
22
68°
50°
23
72°
55°
24
67°
52°
25
71°
54°
26
74°
55°
27
74°
54°
28
73°
49°
29
65°
47°
30
64°
45°
31
63°
44°
1
63°
43°
2
64°
46°
3
65°
53°
4
71°
52°
5
67°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Lac-Castor
Lac-Castor's August 2026 forecast shows daily high temperatures ranging from 63° to 76°, with overnight lows between 43° and 57°. The average high for August is 69° with an average low of 50°. 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 Lac-Castor. See also: September | October | November.
