S
M
T
W
T
F
S
26
55°
45°
27
56°
43°
28
68°
40°
29
72°
46°
30
78°
52°
1
81°
57°
2
81°
58°
3
70°
50°
4
56°
46°
5
58°
46°
6
77°
46°
7
86°
57°
8
87°
60°
9
88°
60°
10
94°
63°
11
90°
63°
12
91°
58°
13
76°
56°
14
82°
54°
15
82°
56°
16
74°
52°
17
69°
51°
18
68°
49°
19
73°
46°
20
81°
54°
21
84°
60°
22
83°
59°
23
73°
51°
24
80°
53°
25
78°
54°
26
74°
50°
27
66°
48°
28
72°
49°
29
78°
52°
30
80°
55°
31
86°
56°
1
88°
55°
2
86°
56°
3
84°
55°
4
86°
56°
5
83°
53°
6
84°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Cajon
Cajon's May 2026 forecast shows daily high temperatures ranging from 66° to 88°, with overnight lows between 48° and 56°. The average high for May is 80° with an average low of 53°. 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 Cajon. See also: June | July | August.
