S
M
T
W
T
F
S
26
43°
34°
27
47°
39°
28
42°
30°
29
63°
27°
30
56°
32°
1
60°
30°
2
76°
26°
3
74°
38°
4
67°
41°
5
52°
37°
6
58°
30°
7
73°
37°
8
75°
44°
9
68°
40°
10
74°
38°
11
89°
39°
12
76°
47°
13
83°
37°
14
87°
51°
15
87°
43°
16
76°
44°
17
67°
46°
18
47°
39°
19
62°
37°
20
59°
32°
21
68°
37°
22
68°
42°
23
79°
39°
24
91°
50°
25
95°
54°
26
89°
60°
27
85°
54°
28
74°
57°
29
77°
58°
30
73°
56°
31
78°
56°
1
79°
56°
2
79°
55°
3
78°
56°
4
83°
55°
5
86°
59°
6
89°
61°
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 73° to 89°, with overnight lows between 54° and 61°. The average high for May is 80° with an average low of 57°. 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.
