S
M
T
W
T
F
S
26
53°
43°
27
68°
38°
28
63°
42°
29
62°
52°
30
70°
51°
1
63°
45°
2
62°
48°
3
62°
43°
4
76°
49°
5
85°
62°
6
73°
63°
7
65°
50°
8
71°
48°
9
77°
56°
10
77°
55°
11
62°
47°
12
69°
43°
13
77°
54°
14
65°
55°
15
70°
51°
16
84°
53°
17
87°
64°
18
95°
64°
19
97°
72°
20
97°
70°
21
73°
57°
22
62°
55°
23
57°
54°
24
65°
57°
25
74°
61°
26
79°
68°
27
80°
64°
28
80°
54°
29
78°
61°
30
79°
49°
31
74°
54°
1
77°
53°
2
76°
54°
3
80°
58°
4
80°
57°
5
83°
63°
6
84°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Bethesda
Bethesda's May 2026 forecast shows daily high temperatures ranging from 74° to 84°, with overnight lows between 49° and 68°. The average high for May is 79° with an average low of 58°. 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 Bethesda. See also: June | July | August.
