S
M
T
W
T
F
S
1
78°
56°
2
67°
52°
3
69°
45°
4
68°
47°
5
72°
39°
6
74°
49°
7
79°
48°
8
79°
39°
9
79°
39°
10
67°
39°
11
77°
41°
12
80°
41°
13
74°
40°
14
73°
40°
15
81°
48°
16
86°
48°
17
88°
48°
18
89°
48°
19
88°
53°
20
90°
53°
21
85°
54°
22
85°
47°
23
80°
47°
24
83°
45°
25
76°
44°
26
83°
44°
27
83°
46°
28
83°
45°
29
88°
45°
30
88°
44°
31
88°
45°
1
60°
55°
2
67°
42°
3
77°
42°
4
84°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
March Weather in Napa
Napa's March 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for March is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how March weather will actually feel in Napa. See also: April | May | June.
