S
M
T
W
T
F
S
26
67°
34°
27
73°
35°
28
65°
34°
29
57°
43°
30
46°
43°
1
58°
35°
2
44°
33°
3
53°
39°
4
64°
33°
5
75°
46°
6
63°
49°
7
62°
43°
8
56°
36°
9
60°
32°
10
66°
44°
11
60°
43°
12
57°
37°
13
56°
36°
14
65°
46°
15
61°
52°
16
76°
50°
17
78°
51°
18
67°
46°
19
89°
47°
20
86°
61°
21
65°
47°
22
69°
38°
23
68°
40°
24
58°
43°
25
71°
46°
26
80°
64°
27
82°
55°
28
66°
46°
29
60°
45°
30
56°
42°
31
63°
45°
1
64°
44°
2
65°
46°
3
68°
50°
4
73°
56°
5
74°
57°
6
73°
56°
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 56° to 82°, with overnight lows between 42° and 64°. The average high for May is 69° with an average low of 51°. 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.
