S
M
T
W
T
F
S
26
65°
41°
27
73°
38°
28
72°
38°
29
68°
44°
30
57°
46°
1
65°
41°
2
55°
44°
3
56°
38°
4
74°
39°
5
82°
50°
6
69°
52°
7
63°
41°
8
60°
39°
9
54°
41°
10
73°
53°
11
63°
48°
12
65°
39°
13
65°
46°
14
58°
51°
15
64°
46°
16
80°
47°
17
90°
53°
18
91°
59°
19
96°
65°
20
91°
57°
21
67°
45°
22
70°
48°
23
59°
50°
24
58°
51°
25
68°
55°
26
78°
57°
27
80°
59°
28
79°
55°
29
80°
56°
30
77°
57°
31
79°
57°
1
80°
58°
2
82°
53°
3
79°
58°
4
80°
57°
5
80°
59°
6
79°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Granby
Granby's May 2026 forecast shows daily high temperatures ranging from 58° to 91°, with overnight lows between 45° and 59°. 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 Granby. See also: June | July | August.
