S
M
T
W
T
F
S
26
80°
58°
27
74°
57°
28
75°
57°
29
80°
59°
30
81°
59°
31
78°
58°
1
72°
58°
2
77°
57°
3
70°
49°
4
71°
56°
5
76°
53°
6
74°
54°
7
76°
52°
8
77°
50°
9
76°
58°
10
78°
57°
11
74°
55°
12
74°
50°
13
70°
49°
14
72°
50°
15
76°
55°
16
72°
54°
17
69°
49°
18
71°
51°
19
73°
56°
20
74°
57°
21
78°
58°
22
73°
58°
23
78°
57°
24
77°
52°
25
77°
52°
26
76°
48°
27
69°
55°
28
73°
51°
29
70°
47°
30
68°
44°
31
66°
47°
1
66°
44°
2
67°
44°
3
68°
45°
4
67°
43°
5
65°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Knife River
Knife River's August 2026 forecast shows daily high temperatures ranging from 65° to 81°, with overnight lows between 43° and 59°. The average high for August is 73° with an average low of 53°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Knife River. See also: September | October | November.
