S
M
T
W
T
F
S
26
81°
54°
27
82°
62°
28
75°
61°
29
66°
53°
30
64°
45°
1
62°
44°
2
58°
40°
3
68°
37°
4
81°
54°
5
65°
49°
6
58°
45°
7
64°
45°
8
72°
45°
9
78°
54°
10
73°
57°
11
74°
50°
12
78°
51°
13
77°
56°
14
71°
46°
15
78°
51°
16
79°
68°
17
85°
67°
18
89°
65°
19
89°
68°
20
72°
62°
21
74°
63°
22
74°
66°
23
77°
66°
24
79°
64°
25
79°
65°
26
81°
67°
27
82°
66°
28
83°
63°
29
81°
65°
30
80°
65°
31
85°
64°
1
83°
60°
2
86°
64°
3
82°
63°
4
79°
59°
5
79°
60°
6
85°
65°
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 72° to 89°, with overnight lows between 59° and 68°. The average high for May is 81° with an average low of 64°. 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.