S
M
T
W
T
F
S
28
91°
77°
29
90°
76°
30
88°
75°
1
88°
75°
2
89°
74°
3
89°
74°
4
90°
75°
5
91°
74°
6
92°
76°
7
92°
77°
8
93°
78°
9
92°
77°
10
91°
76°
11
89°
77°
12
90°
75°
13
92°
76°
14
92°
76°
15
91°
77°
16
92°
76°
17
89°
78°
18
92°
78°
19
92°
77°
20
91°
78°
21
92°
78°
22
89°
77°
23
89°
78°
24
90°
78°
25
89°
79°
26
92°
78°
27
93°
77°
28
92°
75°
29
90°
75°
30
92°
77°
31
93°
77°
1
94°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Upper Grand Lagoon
Upper Grand Lagoon's July 2026 forecast shows daily high temperatures ranging from 88° to 94°, with overnight lows between 74° and 79°. The average high for July is 91° with an average low of 77°. 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 Upper Grand Lagoon. See also: August | September | October.