S
M
T
W
T
F
S
26
83°
63°
27
84°
62°
28
85°
65°
29
86°
65°
30
85°
64°
31
85°
65°
1
86°
65°
2
85°
66°
3
85°
64°
4
83°
63°
5
84°
64°
6
85°
64°
7
83°
62°
8
77°
58°
9
78°
60°
10
77°
63°
11
85°
64°
12
85°
65°
13
86°
64°
14
84°
63°
15
84°
62°
16
83°
62°
17
79°
61°
18
83°
61°
19
84°
60°
20
83°
61°
21
84°
58°
22
83°
53°
23
75°
52°
24
75°
51°
25
76°
51°
26
77°
52°
27
79°
51°
28
78°
58°
29
77°
58°
30
76°
57°
31
81°
57°
1
82°
56°
2
82°
53°
3
78°
51°
4
74°
56°
5
74°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Winthrop
Winthrop's August 2026 forecast shows daily high temperatures ranging from 74° to 86°, with overnight lows between 51° and 66°. The average high for August is 81° with an average low of 60°. 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 Winthrop. See also: September | October | November.
