S
M
T
W
T
F
S
26
29°
18°
27
46°
21°
28
57°
26°
29
60°
27°
30
69°
38°
1
70°
44°
2
67°
45°
3
71°
45°
4
57°
39°
5
51°
36°
6
72°
31°
7
70°
51°
8
70°
42°
9
65°
47°
10
72°
45°
11
62°
45°
12
74°
38°
13
75°
49°
14
67°
49°
15
58°
42°
16
49°
33°
17
52°
33°
18
55°
31°
19
63°
41°
20
55°
42°
21
65°
41°
22
67°
44°
23
73°
44°
24
71°
49°
25
79°
51°
26
72°
46°
27
61°
49°
28
71°
54°
29
75°
52°
30
69°
50°
31
71°
48°
1
67°
46°
2
71°
48°
3
74°
50°
4
74°
51°
5
78°
53°
6
65°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Renfrew
Renfrew's May 2026 forecast shows daily high temperatures ranging from 61° to 79°, with overnight lows between 44° and 54°. The average high for May is 71° with an average low of 49°. 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 Renfrew. See also: June | July | August.