S
M
T
W
T
F
S
26
79°
59°
27
80°
57°
28
79°
61°
29
81°
61°
30
80°
60°
31
82°
62°
1
84°
62°
2
83°
61°
3
84°
62°
4
83°
61°
5
84°
62°
6
85°
63°
7
85°
63°
8
84°
62°
9
82°
62°
10
84°
60°
11
84°
61°
12
83°
61°
13
83°
60°
14
82°
60°
15
79°
58°
16
80°
58°
17
81°
59°
18
82°
58°
19
83°
61°
20
84°
60°
21
85°
60°
22
81°
56°
23
83°
59°
24
86°
57°
25
84°
54°
26
82°
52°
27
82°
52°
28
80°
59°
29
80°
58°
30
83°
58°
31
81°
59°
1
82°
60°
2
84°
57°
3
82°
56°
4
80°
56°
5
81°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Portal
Portal's August 2026 forecast shows daily high temperatures ranging from 79° to 86°, with overnight lows between 52° and 63°. The average high for August is 82° with an average low of 59°. 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 Portal. See also: September | October | November.
