S
M
T
W
T
F
S
28
75°
61°
29
78°
66°
30
89°
65°
1
92°
74°
2
95°
79°
3
95°
75°
4
93°
67°
5
77°
67°
6
75°
65°
7
77°
63°
8
80°
65°
9
85°
70°
10
86°
67°
11
84°
69°
12
86°
68°
13
83°
70°
14
82°
66°
15
77°
64°
16
78°
64°
17
78°
67°
18
79°
68°
19
79°
68°
20
80°
69°
21
79°
70°
22
79°
70°
23
80°
69°
24
80°
70°
25
81°
70°
26
80°
69°
27
81°
70°
28
83°
69°
29
83°
70°
30
84°
71°
31
85°
71°
1
84°
70°
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 75° to 95°, with overnight lows between 63° and 79°. The average high for July is 83° with an average low of 69°. 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.