S
M
T
W
T
F
S
26
50°
40°
27
49°
40°
28
54°
30°
29
51°
32°
30
49°
31°
1
46°
29°
2
50°
31°
3
57°
33°
4
62°
38°
5
56°
36°
6
57°
36°
7
56°
29°
8
52°
30°
9
53°
30°
10
56°
39°
11
53°
38°
12
54°
35°
13
53°
34°
14
53°
38°
15
56°
38°
16
58°
39°
17
59°
37°
18
57°
34°
19
58°
36°
20
63°
44°
21
62°
42°
22
61°
36°
23
59°
37°
24
59°
36°
25
60°
36°
26
62°
39°
27
61°
43°
28
61°
43°
29
64°
45°
30
66°
42°
31
70°
45°
1
72°
49°
2
72°
50°
3
73°
49°
4
70°
48°
5
72°
50°
6
68°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Knife River
Knife River's May 2026 forecast shows daily high temperatures ranging from 46° to 73°, with overnight lows between 29° and 50°. The average high for May is 59° 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 Knife River. See also: June | July | August.
