S
M
T
W
T
F
S
26
61°
40°
27
74°
38°
28
63°
54°
29
54°
43°
30
50°
37°
1
48°
34°
2
47°
34°
3
52°
46°
4
62°
52°
5
60°
44°
6
54°
38°
7
50°
35°
8
52°
40°
9
54°
41°
10
60°
44°
11
60°
42°
12
59°
44°
13
62°
44°
14
59°
43°
15
63°
42°
16
63°
43°
17
64°
47°
18
66°
51°
19
70°
50°
20
70°
51°
21
72°
52°
22
70°
49°
23
68°
51°
24
71°
46°
25
66°
45°
26
67°
53°
27
68°
53°
28
74°
54°
29
72°
53°
30
70°
51°
31
72°
46°
1
68°
48°
2
67°
48°
3
69°
47°
4
69°
48°
5
70°
50°
6
70°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Tonawanda
Tonawanda's May 2026 forecast shows daily high temperatures ranging from 47° to 74°, with overnight lows between 34° and 54°. The average high for May is 64° 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 Tonawanda. See also: June | July | August.
