S
M
T
W
T
F
S
26
93°
63°
27
94°
62°
28
94°
63°
29
93°
64°
30
90°
63°
31
92°
63°
1
94°
62°
2
94°
62°
3
93°
63°
4
93°
63°
5
89°
60°
6
90°
61°
7
94°
60°
8
94°
58°
9
88°
60°
10
87°
59°
11
93°
58°
12
87°
55°
13
85°
56°
14
87°
55°
15
88°
56°
16
90°
58°
17
93°
56°
18
91°
54°
19
88°
56°
20
89°
59°
21
92°
61°
22
93°
60°
23
94°
59°
24
92°
60°
25
90°
52°
26
90°
52°
27
89°
53°
28
86°
52°
29
83°
51°
30
86°
52°
31
85°
53°
1
84°
54°
2
83°
54°
3
84°
55°
4
88°
50°
5
82°
51°
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 82° to 94°, with overnight lows between 50° and 64°. The average high for August is 90° with an average low of 58°. 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.