S
M
T
W
T
F
S
26
85°
68°
27
80°
65°
28
79°
62°
29
80°
65°
30
85°
69°
31
86°
68°
1
83°
67°
2
84°
66°
3
87°
60°
4
80°
60°
5
80°
63°
6
79°
60°
7
80°
59°
8
81°
58°
9
80°
58°
10
80°
64°
11
82°
63°
12
83°
64°
13
86°
58°
14
79°
59°
15
80°
60°
16
79°
59°
17
78°
59°
18
78°
58°
19
79°
57°
20
80°
59°
21
82°
63°
22
84°
65°
23
85°
66°
24
86°
65°
25
86°
63°
26
85°
60°
27
83°
63°
28
84°
62°
29
82°
56°
30
82°
55°
31
78°
53°
1
76°
55°
2
76°
55°
3
77°
56°
4
76°
54°
5
75°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Momence
Momence's August 2026 forecast shows daily high temperatures ranging from 75° to 87°, with overnight lows between 53° and 69°. The average high for August is 81° 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 Momence. See also: September | October | November.