S
M
T
W
T
F
S
1
82°
54°
2
72°
51°
3
74°
46°
4
68°
47°
5
72°
51°
6
72°
46°
7
71°
53°
8
83°
57°
9
73°
49°
10
68°
53°
11
80°
48°
12
90°
54°
13
90°
58°
14
82°
54°
15
83°
52°
16
92°
54°
17
96°
64°
18
94°
64°
19
97°
62°
20
97°
60°
21
88°
60°
22
82°
57°
23
83°
55°
24
83°
57°
25
84°
56°
26
86°
55°
27
85°
56°
28
86°
54°
29
89°
55°
30
80°
54°
31
69°
58°
1
71°
56°
2
69°
54°
3
80°
50°
4
86°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
March Weather in Diamond Bar
Diamond Bar'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 Diamond Bar. See also: April | May | June.
