S
M
T
W
T
F
S
26
63°
51°
27
64°
47°
28
71°
44°
29
73°
47°
30
71°
48°
1
74°
50°
2
75°
50°
3
62°
54°
4
66°
52°
5
65°
48°
6
72°
47°
7
78°
53°
8
74°
52°
9
78°
51°
10
79°
51°
11
88°
51°
12
71°
53°
13
71°
54°
14
71°
51°
15
66°
53°
16
71°
53°
17
70°
51°
18
80°
53°
19
84°
53°
20
87°
58°
21
82°
56°
22
74°
54°
23
72°
55°
24
69°
51°
25
71°
48°
26
68°
51°
27
64°
52°
28
64°
46°
29
69°
53°
30
75°
50°
31
80°
53°
1
79°
54°
2
76°
54°
3
80°
52°
4
80°
54°
5
78°
55°
6
78°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Simi Valley
Simi Valley's May 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May 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 May weather will actually feel in Simi Valley. See also: June | July | August.
