S
M
T
W
T
F
S
28
91°
70°
29
89°
71°
30
92°
72°
1
91°
70°
2
93°
73°
3
93°
72°
4
92°
73°
5
93°
74°
6
94°
74°
7
94°
73°
8
93°
74°
9
94°
74°
10
94°
73°
11
88°
72°
12
87°
73°
13
88°
73°
14
87°
72°
15
88°
73°
16
89°
74°
17
92°
74°
18
91°
73°
19
92°
73°
20
89°
70°
21
89°
71°
22
92°
73°
23
90°
74°
24
90°
72°
25
91°
72°
26
92°
73°
27
96°
67°
28
91°
67°
29
91°
69°
30
94°
72°
31
92°
73°
1
92°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Winthrop
Winthrop's July 2026 forecast shows daily high temperatures ranging from 87° to 96°, with overnight lows between 67° and 74°. The average high for July is 91° with an average low of 72°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Winthrop. See also: August | September | October.