S
M
T
W
T
F
S
26
64°
39°
27
63°
48°
28
57°
45°
29
63°
43°
30
70°
46°
1
68°
43°
2
63°
45°
3
55°
50°
4
55°
43°
5
54°
37°
6
54°
43°
7
59°
39°
8
63°
43°
9
61°
46°
10
55°
41°
11
54°
37°
12
54°
36°
13
N/A
14
49°
37°
15
51°
37°
16
53°
43°
17
53°
41°
18
55°
46°
19
60°
49°
20
64°
50°
21
68°
54°
22
70°
54°
23
63°
49°
24
63°
48°
25
64°
49°
26
56°
49°
27
56°
44°
28
55°
45°
29
55°
44°
30
56°
46°
31
57°
49°
1
61°
51°
2
63°
51°
3
64°
52°
4
63°
51°
5
63°
51°
6
61°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Thorncliffe
Thorncliffe's May 2026 forecast shows daily high temperatures ranging from 49° to 70°, with overnight lows between 37° and 54°. The average high for May is 59° with an average low of 47°. 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 Thorncliffe. See also: June | July | August.