S
M
T
W
T
F
S
26
80°
69°
27
81°
70°
28
83°
69°
29
83°
70°
30
84°
71°
31
85°
71°
1
84°
70°
2
84°
69°
3
80°
65°
4
78°
66°
5
78°
68°
6
79°
69°
7
81°
69°
8
80°
68°
9
84°
70°
10
84°
70°
11
82°
69°
12
81°
69°
13
82°
70°
14
83°
67°
15
83°
69°
16
82°
69°
17
79°
70°
18
84°
70°
19
83°
69°
20
81°
65°
21
83°
61°
22
77°
62°
23
76°
61°
24
77°
62°
25
76°
61°
26
79°
64°
27
76°
61°
28
78°
60°
29
75°
60°
30
75°
59°
31
76°
59°
1
73°
58°
2
72°
60°
3
73°
61°
4
72°
61°
5
73°
60°
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 72° to 85°, with overnight lows between 58° and 71°. The average high for August is 80° with an average low of 66°. 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.
