S
M
T
W
T
F
S
26
64°
53°
27
65°
52°
28
74°
49°
29
77°
50°
30
77°
53°
1
82°
54°
2
81°
54°
3
63°
55°
4
65°
54°
5
65°
51°
6
77°
51°
7
82°
56°
8
79°
54°
9
82°
55°
10
85°
54°
11
91°
55°
12
72°
55°
13
75°
58°
14
75°
54°
15
72°
55°
16
74°
60°
17
71°
56°
18
81°
54°
19
88°
56°
20
90°
64°
21
85°
58°
22
76°
58°
23
77°
57°
24
76°
56°
25
75°
54°
26
66°
55°
27
66°
53°
28
66°
50°
29
71°
55°
30
80°
52°
31
86°
59°
1
84°
57°
2
83°
59°
3
85°
59°
4
82°
61°
5
79°
59°
6
80°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sylmar
Sylmar's May 2026 forecast shows daily high temperatures ranging from 79° to 86°, with overnight lows between 57° and 61°. The average high for May is 83° with an average low of 59°. 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 Sylmar. See also: June | July | August.
