S
M
T
W
T
F
S
26
61°
40°
27
74°
38°
28
63°
54°
29
54°
43°
30
50°
37°
1
47°
32°
2
47°
30°
3
56°
31°
4
71°
48°
5
68°
47°
6
51°
41°
7
52°
38°
8
56°
38°
9
64°
41°
10
56°
43°
11
55°
40°
12
59°
34°
13
64°
45°
14
48°
43°
15
67°
41°
16
74°
49°
17
79°
57°
18
87°
64°
19
84°
66°
20
84°
47°
21
60°
44°
22
65°
42°
23
56°
49°
24
68°
55°
25
72°
56°
26
75°
59°
27
75°
54°
28
70°
51°
29
67°
52°
30
68°
53°
31
67°
54°
1
68°
54°
2
68°
55°
3
67°
56°
4
71°
57°
5
70°
54°
6
69°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Olcott
Olcott's May 2026 forecast shows daily high temperatures ranging from 56° to 75°, with overnight lows between 49° and 59°. The average high for May is 69° with an average low of 55°. 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 Olcott. See also: June | July | August.