S
M
T
W
T
F
S
26
82°
60°
27
82°
61°
28
81°
61°
29
79°
60°
30
77°
60°
31
82°
61°
1
81°
61°
2
82°
59°
3
84°
59°
4
83°
60°
5
82°
58°
6
77°
59°
7
79°
54°
8
76°
53°
9
77°
53°
10
76°
52°
11
76°
59°
12
81°
59°
13
82°
58°
14
82°
52°
15
76°
52°
16
75°
56°
17
77°
58°
18
76°
52°
19
77°
52°
20
76°
51°
21
78°
52°
22
79°
51°
23
79°
51°
24
78°
50°
25
78°
52°
26
79°
56°
27
80°
57°
28
78°
56°
29
79°
58°
30
79°
53°
31
77°
48°
1
74°
47°
2
72°
49°
3
71°
48°
4
72°
48°
5
71°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Greeley
Greeley's August 2026 forecast shows daily high temperatures ranging from 71° to 84°, with overnight lows between 47° and 61°. The average high for August is 78° 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 August weather will actually feel in Greeley. See also: September | October | November.