S
M
T
W
T
F
S
28
87°
53°
29
85°
55°
30
82°
54°
1
85°
55°
2
87°
58°
3
88°
57°
4
87°
53°
5
85°
52°
6
84°
53°
7
83°
54°
8
83°
54°
9
80°
56°
10
80°
56°
11
83°
57°
12
84°
55°
13
81°
53°
14
80°
54°
15
82°
54°
16
85°
56°
17
87°
59°
18
87°
59°
19
86°
60°
20
88°
60°
21
88°
59°
22
86°
58°
23
87°
59°
24
85°
57°
25
84°
56°
26
85°
57°
27
84°
56°
28
86°
58°
29
88°
59°
30
88°
61°
31
Hist. Avg.
83°
56°
1
Hist. Avg.
83°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
July Weather in Napa
Napa's July 2026 forecast shows daily high temperatures ranging from 80° to 88°, with overnight lows between 52° and 61°. The average high for July is 85° with an average low of 56°. 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 Napa. See also: August | September | October.
