S
M
T
W
T
F
S
28
82°
52°
29
77°
51°
30
76°
52°
1
77°
52°
2
76°
53°
3
77°
50°
4
77°
51°
5
83°
54°
6
83°
55°
7
83°
54°
8
82°
54°
9
83°
56°
10
84°
54°
11
83°
52°
12
81°
52°
13
79°
53°
14
81°
54°
15
81°
56°
16
80°
55°
17
79°
56°
18
80°
57°
19
85°
56°
20
87°
56°
21
86°
55°
22
86°
56°
23
85°
56°
24
84°
55°
25
83°
54°
26
84°
54°
27
84°
53°
28
83°
57°
29
85°
56°
30
83°
57°
31
85°
55°
1
85°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Mill Valley
Mill Valley's July 2026 forecast shows daily high temperatures ranging from 76° to 87°, with overnight lows between 50° and 57°. The average high for July is 82° with an average low of 54°. 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 Mill Valley. See also: August | September | October.
