S
M
T
W
T
F
S
26
68°
41°
27
70°
49°
28
57°
47°
29
50°
41°
30
49°
31°
1
48°
38°
2
49°
29°
3
57°
44°
4
72°
45°
5
58°
37°
6
54°
36°
7
52°
37°
8
60°
30°
9
62°
47°
10
57°
32°
11
57°
33°
12
67°
31°
13
54°
42°
14
62°
36°
15
67°
38°
16
73°
55°
17
82°
57°
18
79°
63°
19
79°
48°
20
61°
40°
21
66°
45°
22
66°
53°
23
65°
51°
24
69°
55°
25
75°
57°
26
74°
59°
27
77°
58°
28
76°
57°
29
75°
56°
30
76°
57°
31
77°
52°
1
73°
57°
2
74°
55°
3
68°
54°
4
68°
52°
5
69°
58°
6
73°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Ottawa Center
Ottawa Center's May 2026 forecast shows daily high temperatures ranging from 61° to 79°, with overnight lows between 40° and 59°. The average high for May is 72° with an average low of 54°. 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 Ottawa Center. See also: June | July | August.
