S
M
T
W
T
F
S
26
85°
70°
27
87°
70°
28
89°
69°
29
87°
69°
30
87°
68°
31
80°
68°
1
82°
67°
2
87°
70°
3
89°
70°
4
89°
69°
5
88°
70°
6
88°
68°
7
84°
66°
8
85°
65°
9
84°
60°
10
81°
61°
11
80°
63°
12
81°
60°
13
80°
61°
14
80°
60°
15
79°
63°
16
81°
66°
17
85°
63°
18
80°
62°
19
80°
60°
20
82°
63°
21
81°
64°
22
83°
63°
23
85°
67°
24
87°
67°
25
88°
68°
26
88°
66°
27
87°
58°
28
85°
58°
29
79°
61°
30
78°
58°
31
79°
57°
1
80°
58°
2
78°
56°
3
78°
55°
4
79°
56°
5
80°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Bourbonnais
Bourbonnais's August 2026 forecast shows daily high temperatures ranging from 78° to 89°, with overnight lows between 55° and 70°. The average high for August is 83° with an average low of 64°. 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 Bourbonnais. See also: September | October | November.
