S
M
T
W
T
F
S
28
84°
51°
29
85°
56°
30
85°
58°
1
73°
56°
2
76°
52°
3
79°
52°
4
79°
53°
5
79°
53°
6
76°
55°
7
76°
55°
8
76°
54°
9
81°
55°
10
82°
52°
11
87°
58°
12
89°
59°
13
91°
59°
14
96°
57°
15
91°
56°
16
83°
56°
17
86°
58°
18
85°
57°
19
87°
56°
20
85°
58°
21
88°
57°
22
87°
58°
23
83°
56°
24
78°
55°
25
80°
55°
26
81°
56°
27
82°
57°
28
84°
59°
29
84°
59°
30
83°
58°
31
85°
59°
1
81°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Napa
Napa's July 2026 forecast shows daily high temperatures ranging from 78° to 96°, with overnight lows between 52° and 59°. The average high for July is 85° with an average low of 57°. 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.
