S
M
T
W
T
F
S
26
58°
40°
27
62°
38°
28
63°
50°
29
52°
38°
30
54°
34°
1
51°
32°
2
45°
29°
3
60°
29°
4
72°
43°
5
64°
45°
6
53°
38°
7
54°
34°
8
58°
38°
9
64°
44°
10
58°
37°
11
57°
36°
12
58°
33°
13
61°
43°
14
51°
42°
15
66°
41°
16
70°
46°
17
81°
54°
18
87°
63°
19
83°
63°
20
66°
44°
21
59°
40°
22
56°
40°
23
53°
45°
24
61°
55°
25
76°
56°
26
80°
60°
27
79°
55°
28
72°
51°
29
69°
48°
30
69°
48°
31
68°
50°
1
70°
52°
2
69°
51°
3
71°
56°
4
72°
54°
5
74°
54°
6
73°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Ancaster Heights
Ancaster Heights's May 2026 forecast shows daily high temperatures ranging from 61° to 80°, with overnight lows between 48° and 60°. 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 Ancaster Heights. See also: June | July | August.