S
M
T
W
T
F
S
26
67°
38°
27
73°
37°
28
69°
48°
29
58°
44°
30
50°
38°
1
53°
30°
2
50°
36°
3
59°
36°
4
70°
44°
5
72°
47°
6
54°
43°
7
54°
36°
8
55°
40°
9
67°
32°
10
54°
38°
11
54°
32°
12
56°
32°
13
48°
44°
14
54°
42°
15
63°
42°
16
74°
46°
17
76°
51°
18
83°
48°
19
85°
66°
20
70°
45°
21
59°
39°
22
69°
45°
23
70°
49°
24
56°
52°
25
72°
53°
26
80°
57°
27
72°
50°
28
67°
52°
29
73°
49°
30
69°
52°
31
76°
56°
1
75°
55°
2
75°
56°
3
74°
55°
4
73°
61°
5
76°
57°
6
76°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Byward Market and Rideau Centre
Byward Market and Rideau Centre's May 2026 forecast shows daily high temperatures ranging from 56° to 80°, with overnight lows between 45° and 61°. The average high for May is 72° with an average low of 53°. 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 Byward Market and Rideau Centre. See also: June | July | August.