S
M
T
W
T
F
S
26
64°
29°
27
64°
32°
28
66°
35°
29
54°
39°
30
61°
43°
1
47°
37°
2
52°
34°
3
43°
38°
4
56°
32°
5
71°
38°
6
55°
46°
7
54°
39°
8
51°
37°
9
57°
33°
10
55°
42°
11
55°
35°
12
46°
28°
13
59°
31°
14
63°
44°
15
64°
48°
16
75°
43°
17
65°
44°
18
63°
39°
19
59°
52°
20
83°
45°
21
50°
36°
22
57°
32°
23
64°
31°
24
71°
36°
25
56°
46°
26
72°
49°
27
54°
45°
28
48°
39°
29
54°
37°
30
59°
35°
31
59°
41°
1
61°
41°
2
59°
43°
3
64°
47°
4
73°
50°
5
76°
55°
6
70°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grand Falls
Grand Falls's May 2026 forecast shows daily high temperatures ranging from 48° to 76°, with overnight lows between 35° and 55°. The average high for May is 62° with an average low of 44°. 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 Grand Falls. See also: June | July | August.
