S
M
T
W
T
F
S
1
37°
16°
2
45°
21°
3
46°
38°
4
57°
34°
5
61°
32°
6
54°
29°
7
57°
28°
8
76°
32°
9
71°
35°
10
55°
32°
11
48°
22°
12
74°
21°
13
49°
27°
14
60°
28°
15
49°
9°
16
27°
4°
17
48°
13°
18
80°
29°
19
85°
33°
20
86°
37°
21
96°
42°
22
68°
26°
23
53°
21°
24
71°
31°
25
86°
39°
26
65°
31°
27
50°
22°
28
64°
23°
29
79°
39°
30
86°
36°
31
56°
41°
1
45°
34°
2
45°
36°
3
39°
35°
4
51°
30°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
March Weather in Fullerton
Fullerton'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 Fullerton. See also: April | May | June.
