S
M
T
W
T
F
S
26
59°
42°
27
65°
40°
28
69°
53°
29
55°
44°
30
56°
42°
1
49°
37°
2
48°
36°
3
64°
34°
4
75°
48°
5
64°
47°
6
55°
46°
7
58°
42°
8
63°
40°
9
70°
48°
10
63°
40°
11
57°
37°
12
59°
54°
13
56°
46°
14
60°
43°
15
65°
55°
16
80°
55°
17
74°
59°
18
85°
65°
19
78°
55°
20
67°
48°
21
71°
52°
22
75°
53°
23
74°
56°
24
75°
57°
25
79°
59°
26
77°
58°
27
77°
59°
28
76°
58°
29
78°
59°
30
75°
58°
31
73°
57°
1
69°
55°
2
69°
55°
3
71°
59°
4
79°
60°
5
73°
59°
6
74°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in LaSalle
LaSalle's May 2026 forecast shows daily high temperatures ranging from 56° to 85°, with overnight lows between 43° and 65°. The average high for May is 73° with an average low of 56°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in LaSalle. See also: June | July | August.
