S
M
T
W
T
F
S
26
93°
70°
27
86°
72°
28
82°
68°
29
81°
59°
30
84°
57°
31
76°
62°
1
70°
66°
2
78°
61°
3
82°
56°
4
84°
59°
5
81°
65°
6
81°
66°
7
85°
64°
8
81°
61°
9
85°
58°
10
86°
69°
11
80°
67°
12
81°
68°
13
76°
64°
14
80°
68°
15
79°
72°
16
85°
64°
17
83°
61°
18
83°
64°
19
80°
57°
20
77°
61°
21
77°
61°
22
78°
60°
23
79°
62°
24
82°
65°
25
83°
65°
26
81°
63°
27
82°
64°
28
81°
61°
29
78°
61°
30
82°
64°
31
75°
62°
1
74°
65°
2
75°
61°
3
74°
58°
4
74°
59°
5
77°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Oswego
Oswego's August 2026 forecast shows daily high temperatures ranging from 74° to 85°, with overnight lows between 57° and 72°. The average high for August is 79° with an average low of 62°. 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 Oswego. See also: September | October | November.
