S
M
T
W
T
F
S
26
82°
60°
27
82°
58°
28
74°
66°
29
73°
64°
30
78°
63°
31
82°
58°
1
86°
58°
2
76°
70°
3
75°
64°
4
81°
56°
5
87°
58°
6
84°
66°
7
81°
65°
8
83°
69°
9
78°
59°
10
81°
59°
11
79°
61°
12
78°
66°
13
76°
65°
14
75°
60°
15
75°
60°
16
78°
67°
17
73°
63°
18
74°
66°
19
78°
64°
20
75°
63°
21
75°
63°
22
76°
63°
23
72°
61°
24
73°
63°
25
71°
56°
26
78°
65°
27
79°
66°
28
71°
58°
29
72°
62°
30
76°
64°
31
78°
64°
1
80°
66°
2
80°
65°
3
79°
64°
4
75°
63°
5
73°
61°
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 71° to 80°, with overnight lows between 56° and 67°. The average high for August is 76° with an average low of 63°. 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.
