S
M
T
W
T
F
S
30
76°
51°
31
72°
55°
1
73°
59°
2
76°
56°
3
75°
59°
4
76°
55°
5
80°
49°
6
80°
48°
7
89°
48°
8
95°
54°
9
102°
61°
10
102°
67°
11
94°
56°
12
93°
54°
13
80°
49°
14
83°
49°
15
82°
53°
16
72°
56°
17
74°
56°
18
80°
51°
19
80°
51°
20
80°
51°
21
67°
56°
22
71°
55°
23
88°
50°
24
86°
54°
25
80°
47°
26
78°
48°
27
75°
49°
28
82°
52°
29
85°
53°
30
86°
51°
1
85°
52°
2
91°
52°
3
89°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Napa Abajo
Napa Abajo's September 2026 forecast shows daily high temperatures ranging from 75° to 91°, with overnight lows between 47° and 54°. The average high for September is 84° with an average low of 51°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Napa Abajo. See also: October | November | December.
