S
M
T
W
T
F
S
26
61°
35°
27
64°
50°
28
63°
42°
29
47°
33°
30
46°
31°
1
44°
30°
2
45°
30°
3
49°
36°
4
55°
38°
5
59°
40°
6
55°
37°
7
54°
39°
8
52°
39°
9
55°
37°
10
54°
39°
11
62°
41°
12
64°
44°
13
67°
36°
14
57°
35°
15
58°
34°
16
59°
36°
17
60°
39°
18
62°
46°
19
67°
40°
20
60°
37°
21
60°
37°
22
61°
38°
23
62°
39°
24
67°
48°
25
71°
44°
26
63°
42°
27
63°
40°
28
64°
46°
29
71°
50°
30
73°
49°
31
68°
47°
1
71°
49°
2
75°
52°
3
75°
51°
4
74°
46°
5
65°
44°
6
66°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Erin
Erin's May 2026 forecast shows daily high temperatures ranging from 44° to 75°, with overnight lows between 30° and 52°. The average high for May is 61° with an average low of 41°. 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 Erin. See also: June | July | August.