S
M
T
W
T
F
S
26
58°
44°
27
70°
37°
28
63°
49°
29
60°
54°
30
69°
41°
1
68°
38°
2
60°
45°
3
63°
40°
4
78°
41°
5
85°
58°
6
72°
58°
7
65°
45°
8
73°
37°
9
76°
52°
10
82°
47°
11
64°
47°
12
72°
38°
13
77°
54°
14
63°
51°
15
73°
51°
16
85°
45°
17
88°
57°
18
95°
62°
19
96°
67°
20
95°
64°
21
70°
54°
22
59°
50°
23
55°
50°
24
67°
62°
25
78°
63°
26
76°
66°
27
74°
64°
28
82°
58°
29
78°
58°
30
75°
53°
31
72°
55°
1
77°
57°
2
76°
57°
3
77°
58°
4
79°
60°
5
80°
62°
6
82°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Potomac Falls
Potomac Falls's May 2026 forecast shows daily high temperatures ranging from 67° to 82°, with overnight lows between 53° and 66°. The average high for May is 77° with an average low of 59°. 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 Falls. See also: June | July | August.
