S
M
T
W
T
F
S
28
78°
56°
29
80°
57°
30
83°
63°
1
90°
68°
2
92°
72°
3
95°
71°
4
88°
67°
5
83°
64°
6
71°
59°
7
72°
54°
8
74°
58°
9
76°
59°
10
78°
58°
11
79°
58°
12
79°
58°
13
80°
57°
14
78°
58°
15
79°
57°
16
73°
54°
17
75°
55°
18
75°
56°
19
80°
60°
20
80°
60°
21
74°
59°
22
75°
60°
23
78°
60°
24
76°
59°
25
77°
59°
26
79°
60°
27
80°
61°
28
80°
60°
29
79°
61°
30
81°
62°
31
81°
61°
1
80°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Big Boulder
Big Boulder's July 2026 forecast shows daily high temperatures ranging from 71° to 95°, with overnight lows between 54° and 72°. The average high for July is 79° 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 July weather will actually feel in Big Boulder. See also: August | September | October.
