S
M
T
W
T
F
S
26
99°
73°
27
91°
70°
28
88°
68°
29
88°
64°
30
97°
70°
31
90°
64°
1
95°
68°
2
102°
70°
3
99°
62°
4
81°
59°
5
89°
62°
6
97°
68°
7
99°
65°
8
96°
66°
9
95°
64°
10
94°
64°
11
91°
65°
12
90°
63°
13
88°
62°
14
89°
58°
15
91°
61°
16
92°
61°
17
91°
59°
18
90°
60°
19
88°
58°
20
87°
58°
21
89°
57°
22
88°
56°
23
88°
57°
24
90°
60°
25
91°
56°
26
87°
56°
27
90°
59°
28
91°
60°
29
91°
59°
30
92°
60°
31
91°
59°
1
90°
58°
2
91°
59°
3
90°
58°
4
87°
58°
5
85°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Northglenn
Northglenn's August 2026 forecast shows daily high temperatures ranging from 81° to 102°, with overnight lows between 56° and 70°. The average high for August is 91° with an average low of 61°. 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 Northglenn. See also: September | October | November.