S
M
T
W
T
F
S
26
99°
73°
27
100°
75°
28
89°
69°
29
94°
69°
30
91°
71°
31
76°
65°
1
86°
64°
2
85°
65°
3
87°
67°
4
78°
57°
5
81°
63°
6
86°
64°
7
90°
64°
8
86°
64°
9
86°
65°
10
86°
65°
11
84°
66°
12
83°
65°
13
82°
64°
14
79°
63°
15
82°
63°
16
82°
64°
17
81°
62°
18
86°
67°
19
84°
65°
20
84°
66°
21
83°
68°
22
86°
67°
23
84°
66°
24
84°
66°
25
80°
65°
26
74°
63°
27
73°
61°
28
80°
64°
29
82°
64°
30
83°
66°
31
84°
65°
1
83°
64°
2
83°
65°
3
84°
66°
4
84°
65°
5
82°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in St. Paul
St. Paul's August 2026 forecast shows daily high temperatures ranging from 73° to 90°, with overnight lows between 57° and 68°. The average high for August is 83° with an average low of 64°. 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 St. Paul. See also: September | October | November.