S
M
T
W
T
F
S
26
74°
42°
27
74°
55°
28
64°
49°
29
58°
39°
30
59°
37°
1
55°
37°
2
60°
29°
3
75°
42°
4
82°
42°
5
59°
45°
6
56°
32°
7
65°
30°
8
72°
39°
9
74°
49°
10
68°
37°
11
67°
41°
12
77°
44°
13
69°
42°
14
76°
39°
15
85°
58°
16
86°
63°
17
85°
66°
18
78°
66°
19
74°
47°
20
63°
42°
21
66°
45°
22
71°
49°
23
77°
55°
24
76°
54°
25
77°
56°
26
78°
57°
27
78°
55°
28
79°
53°
29
76°
54°
30
78°
58°
31
81°
57°
1
81°
58°
2
79°
57°
3
72°
53°
4
72°
52°
5
75°
58°
6
80°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lanark
Lanark's May 2026 forecast shows daily high temperatures ranging from 63° to 86°, with overnight lows between 42° and 66°. The average high for May is 76° with an average low of 55°. 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 Lanark. See also: June | July | August.
