S
M
T
W
T
F
S
26
58°
42°
27
69°
41°
28
69°
43°
29
65°
49°
30
62°
48°
1
65°
45°
2
62°
50°
3
60°
45°
4
74°
44°
5
87°
54°
6
75°
56°
7
66°
50°
8
64°
45°
9
66°
52°
10
75°
51°
11
63°
51°
12
70°
44°
13
77°
52°
14
68°
52°
15
68°
49°
16
83°
48°
17
90°
67°
18
87°
69°
19
97°
75°
20
93°
54°
21
68°
51°
22
63°
48°
23
65°
51°
24
66°
49°
25
69°
54°
26
70°
54°
27
75°
53°
28
78°
55°
29
76°
56°
30
80°
53°
31
74°
57°
1
75°
55°
2
72°
53°
3
69°
54°
4
71°
58°
5
75°
56°
6
76°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Demarest
Demarest's May 2026 forecast shows daily high temperatures ranging from 63° to 97°, with overnight lows between 48° and 75°. The average high for May is 76° with an average low of 56°. 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 Demarest. See also: June | July | August.