S
M
T
W
T
F
S
26
63°
50°
27
63°
53°
28
64°
51°
29
63°
51°
30
63°
52°
31
67°
55°
1
67°
52°
2
64°
50°
3
66°
50°
4
66°
50°
5
64°
51°
6
66°
50°
7
67°
50°
8
65°
48°
9
67°
50°
10
68°
49°
11
67°
54°
12
69°
54°
13
64°
55°
14
68°
55°
15
67°
54°
16
63°
53°
17
64°
54°
18
65°
53°
19
64°
49°
20
66°
52°
21
68°
54°
22
68°
49°
23
66°
54°
24
63°
51°
25
64°
52°
26
62°
52°
27
63°
54°
28
62°
53°
29
62°
53°
30
64°
52°
31
65°
53°
1
65°
51°
2
64°
52°
3
64°
51°
4
63°
49°
5
64°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Arnprior
Arnprior's August 2026 forecast shows daily high temperatures ranging from 62° to 69°, with overnight lows between 47° and 55°. The average high for August is 65° with an average low of 52°. 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 Arnprior. See also: September | October | November.
