S
M
T
W
T
F
S
26
61°
35°
27
65°
40°
28
60°
48°
29
50°
35°
30
50°
31°
1
48°
29°
2
43°
27°
3
59°
26°
4
69°
41°
5
60°
44°
6
49°
37°
7
51°
32°
8
57°
33°
9
62°
35°
10
52°
32°
11
52°
31°
12
55°
28°
13
54°
40°
14
54°
40°
15
64°
36°
16
68°
41°
17
82°
46°
18
83°
62°
19
81°
63°
20
57°
36°
21
58°
39°
22
58°
47°
23
51°
46°
24
64°
50°
25
67°
49°
26
73°
52°
27
72°
53°
28
72°
53°
29
69°
54°
30
71°
54°
31
73°
53°
1
73°
54°
2
74°
58°
3
74°
53°
4
73°
54°
5
73°
53°
6
72°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Guelph/Eramosa
Guelph/Eramosa's May 2026 forecast shows daily high temperatures ranging from 51° to 74°, with overnight lows between 36° and 58°. The average high for May is 68° with an average low of 50°. 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 Guelph/Eramosa. See also: June | July | August.