S
M
T
W
T
F
S
26
75°
54°
27
71°
52°
28
72°
53°
29
67°
52°
30
67°
50°
31
68°
52°
1
70°
52°
2
67°
51°
3
74°
53°
4
73°
52°
5
67°
52°
6
66°
48°
7
71°
52°
8
74°
53°
9
72°
52°
10
66°
50°
11
64°
49°
12
65°
45°
13
65°
49°
14
66°
51°
15
68°
50°
16
72°
51°
17
63°
45°
18
70°
45°
19
72°
46°
20
73°
48°
21
74°
50°
22
73°
42°
23
68°
42°
24
67°
47°
25
71°
48°
26
72°
48°
27
68°
42°
28
68°
48°
29
71°
48°
30
68°
46°
31
62°
45°
1
66°
47°
2
70°
46°
3
70°
43°
4
69°
37°
5
59°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Calais
Calais's August 2026 forecast shows daily high temperatures ranging from 59° to 75°, with overnight lows between 37° and 54°. The average high for August is 69° with an average low of 48°. 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 Calais. See also: September | October | November.
