S
M
T
W
T
F
S
26
77°
60°
27
74°
55°
28
77°
54°
29
77°
56°
30
73°
54°
1
72°
52°
2
72°
52°
3
73°
51°
4
71°
57°
5
70°
55°
6
70°
52°
7
69°
51°
8
69°
53°
9
72°
57°
10
76°
58°
11
76°
57°
12
75°
57°
13
75°
56°
14
74°
55°
15
68°
54°
16
69°
52°
17
68°
55°
18
68°
55°
19
69°
54°
20
68°
55°
21
71°
56°
22
72°
56°
23
72°
55°
24
67°
54°
25
67°
54°
26
66°
51°
27
66°
50°
28
69°
54°
29
71°
54°
30
72°
55°
31
67°
55°
1
68°
49°
2
67°
47°
3
67°
49°
4
68°
48°
5
67°
49°
6
66°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Thornlie
Thornlie's May 2026 forecast shows daily high temperatures ranging from 66° to 77°, with overnight lows between 47° and 60°. The average high for May is 71° 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 Thornlie. See also: June | July | August.