S
M
T
W
T
F
S
26
95°
75°
27
95°
75°
28
96°
74°
29
96°
75°
30
95°
75°
31
95°
74°
1
94°
75°
2
95°
75°
3
95°
74°
4
96°
75°
5
95°
75°
6
95°
74°
7
90°
69°
8
91°
67°
9
90°
63°
10
89°
65°
11
86°
67°
12
92°
63°
13
85°
63°
14
84°
66°
15
85°
70°
16
85°
69°
17
92°
66°
18
88°
62°
19
83°
62°
20
84°
60°
21
84°
62°
22
85°
66°
23
89°
68°
24
91°
67°
25
91°
69°
26
90°
66°
27
90°
63°
28
88°
60°
29
83°
59°
30
82°
60°
31
81°
59°
1
82°
57°
2
79°
56°
3
80°
56°
4
80°
57°
5
81°
60°
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 79° to 96°, with overnight lows between 56° and 75°. The average high for August is 89° with an average low of 67°. 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.