S
M
T
W
T
F
S
26
85°
67°
27
80°
60°
28
81°
62°
29
83°
65°
30
82°
60°
31
82°
58°
1
81°
59°
2
79°
58°
3
80°
58°
4
80°
59°
5
79°
59°
6
80°
60°
7
80°
59°
8
81°
63°
9
83°
65°
10
85°
63°
11
84°
59°
12
85°
66°
13
88°
59°
14
82°
57°
15
79°
59°
16
80°
59°
17
80°
60°
18
79°
57°
19
80°
56°
20
78°
56°
21
79°
57°
22
78°
56°
23
77°
56°
24
78°
57°
25
79°
63°
26
80°
64°
27
84°
65°
28
87°
62°
29
86°
55°
30
82°
57°
31
79°
60°
1
78°
61°
2
77°
57°
3
78°
53°
4
76°
58°
5
76°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in LaSalle
LaSalle's August 2026 forecast shows daily high temperatures ranging from 76° to 88°, with overnight lows between 53° and 67°. The average high for August is 81° with an average low of 60°. 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 LaSalle. See also: September | October | November.
