S
M
T
W
T
F
S
26
58°
44°
27
70°
35°
28
65°
45°
29
60°
53°
30
70°
44°
1
69°
34°
2
62°
47°
3
64°
39°
4
79°
40°
5
85°
47°
6
72°
57°
7
63°
45°
8
73°
36°
9
76°
50°
10
83°
44°
11
63°
43°
12
74°
36°
13
76°
53°
14
65°
50°
15
74°
48°
16
86°
43°
17
89°
56°
18
95°
59°
19
96°
63°
20
95°
62°
21
70°
54°
22
59°
51°
23
57°
55°
24
68°
62°
25
76°
63°
26
75°
64°
27
77°
65°
28
75°
59°
29
80°
55°
30
72°
50°
31
73°
56°
1
76°
59°
2
77°
58°
3
78°
59°
4
77°
59°
5
81°
60°
6
75°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Loch Lomond
Loch Lomond's May 2026 forecast shows daily high temperatures ranging from 57° to 81°, with overnight lows between 50° and 65°. The average high for May is 74° 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 Loch Lomond. See also: June | July | August.
