S
M
T
W
T
F
S
26
39°
28°
27
49°
26°
28
59°
26°
29
61°
27°
30
68°
27°
1
70°
29°
2
69°
38°
3
74°
30°
4
56°
41°
5
64°
35°
6
78°
45°
7
71°
44°
8
71°
48°
9
67°
42°
10
75°
45°
11
78°
46°
12
70°
48°
13
67°
42°
14
69°
43°
15
67°
43°
16
69°
41°
17
70°
42°
18
71°
43°
19
64°
38°
20
65°
38°
21
67°
40°
22
75°
47°
23
74°
48°
24
75°
46°
25
76°
49°
26
74°
49°
27
66°
46°
28
67°
42°
29
69°
44°
30
76°
48°
31
78°
51°
1
79°
52°
2
78°
51°
3
79°
52°
4
78°
51°
5
77°
51°
6
78°
49°
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 64° to 79°, with overnight lows between 35° and 52°. The average high for May is 72° with an average low of 45°. 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.