S
M
T
W
T
F
S
26
76°
49°
27
73°
57°
28
67°
56°
29
64°
41°
30
64°
41°
1
56°
40°
2
64°
37°
3
60°
42°
4
81°
45°
5
57°
41°
6
60°
36°
7
64°
42°
8
65°
46°
9
77°
44°
10
66°
42°
11
65°
43°
12
73°
39°
13
66°
42°
14
85°
42°
15
85°
60°
16
85°
64°
17
85°
67°
18
80°
65°
19
81°
55°
20
70°
50°
21
72°
52°
22
76°
61°
23
86°
64°
24
84°
59°
25
82°
54°
26
89°
59°
27
89°
59°
28
82°
54°
29
88°
56°
30
82°
55°
31
77°
55°
1
84°
61°
2
84°
54°
3
89°
54°
4
89°
54°
5
91°
62°
6
88°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Seneca
Seneca's May 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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 Seneca. See also: June | July | August.