S
M
T
W
T
F
S
26
55°
46°
27
71°
41°
28
59°
50°
29
59°
49°
30
62°
39°
1
67°
32°
2
56°
40°
3
62°
37°
4
78°
38°
5
83°
49°
6
65°
53°
7
68°
50°
8
68°
37°
9
67°
50°
10
69°
45°
11
68°
45°
12
76°
38°
13
74°
47°
14
56°
47°
15
70°
43°
16
82°
61°
17
84°
58°
18
95°
62°
19
97°
64°
20
81°
57°
21
72°
47°
22
71°
50°
23
79°
52°
24
82°
54°
25
83°
57°
26
81°
56°
27
79°
59°
28
82°
60°
29
74°
60°
30
76°
59°
31
73°
56°
1
72°
53°
2
72°
52°
3
71°
52°
4
73°
53°
5
79°
61°
6
82°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Potomac
Potomac's May 2026 forecast shows daily high temperatures ranging from 70° to 97°, with overnight lows between 43° and 64°. The average high for May is 79° 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 Potomac. See also: June | July | August.
