S
M
T
W
T
F
S
26
66°
54°
27
67°
58°
28
74°
50°
29
76°
52°
30
75°
56°
1
78°
61°
2
74°
58°
3
66°
59°
4
68°
56°
5
66°
56°
6
75°
52°
7
78°
55°
8
77°
60°
9
80°
61°
10
81°
61°
11
87°
59°
12
71°
58°
13
74°
62°
14
74°
56°
15
72°
60°
16
72°
62°
17
69°
61°
18
78°
60°
19
86°
55°
20
87°
59°
21
81°
60°
22
75°
61°
23
75°
61°
24
72°
60°
25
74°
56°
26
68°
57°
27
68°
54°
28
72°
56°
29
78°
57°
30
81°
59°
31
85°
61°
1
83°
61°
2
81°
63°
3
81°
63°
4
80°
62°
5
81°
65°
6
80°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South El Monte
South El Monte's May 2026 forecast shows daily high temperatures ranging from 68° to 85°, with overnight lows between 54° and 65°. The average high for May is 79° with an average low of 60°. 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 South El Monte. See also: June | July | August.
