S
M
T
W
T
F
S
26
96°
76°
27
96°
76°
28
95°
75°
29
96°
76°
30
97°
75°
31
97°
75°
1
96°
74°
2
96°
75°
3
95°
75°
4
96°
74°
5
96°
75°
6
95°
75°
7
90°
68°
8
91°
68°
9
93°
65°
10
91°
66°
11
88°
69°
12
93°
65°
13
88°
64°
14
87°
69°
15
88°
71°
16
88°
70°
17
93°
68°
18
93°
64°
19
86°
63°
20
86°
62°
21
87°
63°
22
88°
66°
23
92°
68°
24
93°
68°
25
92°
69°
26
92°
67°
27
91°
67°
28
88°
64°
29
85°
63°
30
84°
62°
31
83°
61°
1
84°
59°
2
82°
58°
3
82°
58°
4
81°
59°
5
82°
60°
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 81° to 97°, with overnight lows between 58° and 76°. The average high for August is 90° with an average low of 68°. 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.
