S
M
T
W
T
F
S
26
58°
43°
27
71°
38°
28
60°
49°
29
61°
53°
30
67°
42°
1
68°
37°
2
60°
41°
3
63°
38°
4
78°
43°
5
85°
59°
6
72°
55°
7
66°
45°
8
71°
55°
9
71°
53°
10
79°
53°
11
63°
43°
12
63°
45°
13
61°
50°
14
66°
50°
15
71°
56°
16
76°
55°
17
73°
54°
18
78°
60°
19
79°
60°
20
75°
55°
21
68°
51°
22
67°
52°
23
68°
53°
24
69°
52°
25
71°
54°
26
74°
59°
27
73°
56°
28
74°
57°
29
76°
55°
30
78°
61°
31
80°
62°
1
75°
62°
2
80°
61°
3
80°
62°
4
81°
63°
5
81°
63°
6
82°
64°
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 61° to 82°, with overnight lows between 43° and 64°. The average high for May is 73° 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.
