S
M
T
W
T
F
S
26
77°
58°
27
71°
51°
28
66°
49°
29
80°
59°
30
75°
56°
1
69°
50°
2
63°
38°
3
69°
42°
4
73°
52°
5
81°
57°
6
78°
60°
7
71°
42°
8
67°
43°
9
72°
50°
10
70°
52°
11
75°
54°
12
77°
54°
13
74°
55°
14
75°
52°
15
80°
57°
16
81°
56°
17
81°
58°
18
77°
58°
19
78°
57°
20
81°
58°
21
82°
58°
22
82°
59°
23
81°
59°
24
82°
60°
25
82°
60°
26
79°
59°
27
80°
60°
28
77°
60°
29
79°
61°
30
80°
60°
31
80°
61°
1
82°
61°
2
84°
62°
3
84°
62°
4
81°
59°
5
76°
57°
6
76°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Fallston
Fallston's May 2026 forecast shows daily high temperatures ranging from 63° to 84°, with overnight lows between 38° and 62°. The average high for May is 77° 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 Fallston. See also: June | July | August.