S
M
T
W
T
F
S
26
61°
53°
27
62°
52°
28
63°
52°
29
65°
52°
30
63°
52°
1
60°
53°
2
59°
53°
3
63°
53°
4
62°
54°
5
61°
52°
6
68°
56°
7
63°
54°
8
66°
54°
9
66°
55°
10
66°
53°
11
73°
57°
12
72°
58°
13
68°
56°
14
67°
57°
15
64°
55°
16
66°
53°
17
65°
54°
18
65°
53°
19
64°
52°
20
61°
49°
21
60°
51°
22
61°
50°
23
62°
50°
24
63°
51°
25
62°
51°
26
62°
49°
27
66°
50°
28
61°
50°
29
68°
54°
30
69°
55°
31
69°
56°
1
68°
56°
2
67°
55°
3
63°
54°
4
62°
55°
5
62°
53°
6
63°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Ft. Mason
Ft. Mason's May 2026 forecast shows daily high temperatures ranging from 60° to 73°, with overnight lows between 49° and 58°. The average high for May is 65° with an average low of 53°. 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 Ft. Mason. See also: June | July | August.