S
M
T
W
T
F
S
26
44°
32°
27
51°
36°
28
58°
26°
29
58°
34°
30
55°
28°
1
62°
31°
2
72°
35°
3
73°
40°
4
73°
41°
5
71°
39°
6
57°
33°
7
68°
38°
8
65°
38°
9
70°
40°
10
65°
42°
11
68°
43°
12
76°
40°
13
64°
43°
14
61°
38°
15
60°
38°
16
62°
44°
17
64°
43°
18
68°
45°
19
69°
46°
20
68°
46°
21
63°
43°
22
65°
42°
23
69°
43°
24
65°
41°
25
63°
41°
26
63°
40°
27
67°
40°
28
69°
46°
29
78°
51°
30
79°
50°
31
69°
52°
1
79°
52°
2
77°
51°
3
77°
52°
4
78°
53°
5
75°
54°
6
75°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sidney
Sidney's May 2026 forecast shows daily high temperatures ranging from 55° to 79°, with overnight lows between 28° and 54°. The average high for May is 68° with an average low of 43°. 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 Sidney. See also: June | July | August.
