S
M
T
W
T
F
S
26
65°
38°
27
59°
32°
28
57°
35°
29
66°
39°
30
67°
40°
1
68°
40°
2
69°
41°
3
69°
39°
4
57°
32°
5
62°
39°
6
69°
40°
7
70°
40°
8
66°
39°
9
70°
41°
10
69°
41°
11
70°
40°
12
65°
41°
13
69°
42°
14
63°
36°
15
65°
38°
16
67°
32°
17
62°
36°
18
68°
41°
19
74°
42°
20
73°
35°
21
70°
33°
22
65°
37°
23
69°
44°
24
76°
36°
25
72°
36°
26
72°
37°
27
71°
32°
28
64°
33°
29
65°
35°
30
66°
41°
31
71°
46°
1
78°
46°
2
81°
49°
3
82°
47°
4
80°
45°
5
79°
47°
6
80°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grasmere
Grasmere's May 2026 forecast shows daily high temperatures ranging from 57° to 82°, with overnight lows between 32° and 49°. The average high for May is 69° with an average low of 39°. 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 Grasmere. See also: June | July | August.