S
M
T
W
T
F
S
26
81°
56°
27
83°
58°
28
79°
65°
29
81°
63°
30
83°
60°
31
86°
52°
1
85°
61°
2
68°
61°
3
80°
54°
4
80°
50°
5
85°
50°
6
84°
59°
7
81°
63°
8
79°
61°
9
80°
58°
10
82°
58°
11
81°
53°
12
81°
52°
13
82°
54°
14
75°
52°
15
78°
52°
16
80°
50°
17
79°
56°
18
79°
51°
19
78°
49°
20
76°
47°
21
76°
45°
22
77°
48°
23
71°
52°
24
N/A
25
74°
50°
26
75°
59°
27
72°
55°
28
72°
49°
29
71°
53°
30
73°
59°
31
70°
51°
1
72°
53°
2
68°
50°
3
68°
51°
4
72°
49°
5
71°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Selwyn
Selwyn's August 2026 forecast shows daily high temperatures ranging from 68° to 75°, with overnight lows between 49° and 59°. The average high for August is 72° with an average low of 53°. 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 Selwyn. See also: September | October | November.