S
M
T
W
T
F
S
26
64°
52°
27
66°
50°
28
74°
44°
29
76°
43°
30
76°
44°
1
74°
50°
2
68°
54°
3
68°
53°
4
65°
47°
5
66°
47°
6
75°
47°
7
76°
53°
8
71°
52°
9
77°
51°
10
78°
52°
11
84°
54°
12
85°
52°
13
76°
51°
14
79°
49°
15
83°
50°
16
81°
49°
17
81°
45°
18
85°
45°
19
90°
51°
20
89°
52°
21
86°
52°
22
85°
51°
23
71°
50°
24
75°
50°
25
71°
50°
26
79°
51°
27
84°
57°
28
85°
55°
29
79°
54°
30
83°
53°
31
86°
52°
1
87°
53°
2
87°
54°
3
86°
55°
4
85°
56°
5
80°
54°
6
80°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Napa Abajo
Napa Abajo's May 2026 forecast shows daily high temperatures ranging from 71° to 87°, with overnight lows between 50° and 57°. The average high for May is 81° with an average low of 53°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Napa Abajo. See also: June | July | August.