S
M
T
W
T
F
S
26
65°
38°
27
73°
38°
28
73°
47°
29
69°
50°
30
53°
40°
1
55°
36°
2
49°
41°
3
55°
36°
4
63°
36°
5
70°
47°
6
48°
42°
7
52°
41°
8
53°
35°
9
64°
34°
10
62°
45°
11
54°
42°
12
55°
42°
13
53°
41°
14
53°
46°
15
67°
49°
16
75°
46°
17
74°
53°
18
75°
50°
19
85°
62°
20
76°
49°
21
59°
42°
22
69°
34°
23
71°
44°
24
56°
51°
25
68°
52°
26
85°
50°
27
72°
55°
28
66°
53°
29
64°
46°
30
63°
46°
31
69°
47°
1
70°
44°
2
77°
47°
3
84°
53°
4
84°
52°
5
N/A
6
71°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Napierville
Napierville's May 2026 forecast shows daily high temperatures ranging from 71° to 71°, with overnight lows between 60° and 60°. The average high for May is 71° 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 May weather will actually feel in Napierville. See also: June | July | August.
