S
M
T
W
T
F
S
26
81°
54°
27
84°
63°
28
61°
55°
29
64°
46°
30
66°
39°
1
62°
41°
2
60°
41°
3
75°
51°
4
75°
55°
5
61°
44°
6
55°
40°
7
60°
41°
8
69°
50°
9
71°
51°
10
71°
49°
11
72°
51°
12
72°
52°
13
71°
49°
14
74°
51°
15
72°
56°
16
69°
55°
17
73°
58°
18
76°
58°
19
77°
57°
20
77°
59°
21
76°
59°
22
76°
55°
23
72°
51°
24
72°
53°
25
75°
59°
26
76°
56°
27
72°
54°
28
73°
53°
29
72°
52°
30
76°
61°
31
80°
61°
1
77°
60°
2
83°
62°
3
82°
60°
4
75°
55°
5
75°
54°
6
76°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Olney
Olney's May 2026 forecast shows daily high temperatures ranging from 55° to 83°, with overnight lows between 40° and 62°. 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 Olney. See also: June | July | August.