S
M
T
W
T
F
S
26
85°
66°
27
87°
67°
28
80°
66°
29
81°
64°
30
87°
62°
31
89°
66°
1
81°
65°
2
74°
65°
3
79°
60°
4
81°
57°
5
84°
57°
6
85°
69°
7
84°
71°
8
89°
70°
9
83°
61°
10
84°
67°
11
81°
66°
12
78°
65°
13
81°
63°
14
N/A
15
80°
71°
16
81°
66°
17
81°
59°
18
81°
65°
19
80°
61°
20
75°
58°
21
75°
56°
22
78°
59°
23
80°
61°
24
81°
60°
25
82°
62°
26
82°
62°
27
78°
59°
28
76°
58°
29
75°
63°
30
79°
65°
31
72°
60°
1
73°
63°
2
73°
63°
3
74°
61°
4
71°
58°
5
73°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in LaSalle
LaSalle's August 2026 forecast shows daily high temperatures ranging from 71° to 82°, with overnight lows between 56° and 71°. The average high for August is 77° 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 LaSalle. See also: September | October | November.
