S
M
T
W
T
F
S
26
64°
50°
27
63°
42°
28
74°
40°
29
75°
43°
30
80°
44°
1
79°
46°
2
60°
52°
3
61°
49°
4
68°
49°
5
67°
50°
6
77°
50°
7
81°
47°
8
79°
48°
9
85°
49°
10
88°
52°
11
86°
50°
12
85°
50°
13
85°
49°
14
80°
48°
15
79°
49°
16
81°
46°
17
82°
50°
18
82°
49°
19
81°
50°
20
84°
50°
21
82°
48°
22
82°
48°
23
83°
50°
24
84°
50°
25
84°
49°
26
83°
49°
27
79°
48°
28
77°
49°
29
78°
50°
30
79°
50°
31
80°
51°
1
82°
51°
2
84°
50°
3
82°
51°
4
79°
50°
5
79°
49°
6
78°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Ben Lomond
Ben Lomond's May 2026 forecast shows daily high temperatures ranging from 61° to 88°, with overnight lows between 46° and 52°. The average high for May is 80° with an average low of 49°. 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 Ben Lomond. See also: June | July | August.