S
M
T
W
T
F
S
26
80°
62°
27
80°
61°
28
81°
61°
29
80°
62°
30
81°
63°
31
84°
63°
1
84°
62°
2
83°
62°
3
85°
61°
4
85°
61°
5
84°
60°
6
86°
59°
7
86°
59°
8
85°
57°
9
86°
59°
10
87°
62°
11
87°
62°
12
86°
61°
13
87°
60°
14
85°
59°
15
82°
59°
16
81°
55°
17
79°
55°
18
81°
56°
19
81°
57°
20
83°
55°
21
80°
59°
22
85°
58°
23
85°
60°
24
84°
61°
25
85°
60°
26
86°
59°
27
85°
60°
28
84°
56°
29
83°
54°
30
81°
56°
31
80°
57°
1
79°
57°
2
80°
61°
3
84°
61°
4
84°
60°
5
82°
59°
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 87°, with overnight lows between 54° and 63°. The average high for August is 83° 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.
