S
M
T
W
T
F
S
26
50°
40°
27
51°
42°
28
52°
41°
29
53°
46°
30
53°
46°
1
58°
47°
2
55°
45°
3
53°
41°
4
52°
41°
5
52°
42°
6
54°
42°
7
53°
41°
8
53°
41°
9
57°
42°
10
59°
47°
11
60°
48°
12
60°
46°
13
56°
43°
14
57°
48°
15
56°
46°
16
55°
45°
17
55°
43°
18
56°
43°
19
54°
44°
20
55°
43°
21
55°
45°
22
60°
48°
23
58°
44°
24
58°
49°
25
63°
50°
26
62°
50°
27
63°
49°
28
63°
50°
29
62°
51°
30
63°
51°
31
65°
49°
1
61°
50°
2
63°
46°
3
61°
46°
4
64°
51°
5
65°
51°
6
64°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Whitby
Whitby's May 2026 forecast shows daily high temperatures ranging from 50° to 65°, with overnight lows between 40° and 51°. The average high for May is 58° with an average low of 46°. 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 Whitby. See also: June | July | August.