S
M
T
W
T
F
S
26
64°
41°
27
57°
45°
28
57°
44°
29
63°
46°
30
65°
46°
1
65°
47°
2
73°
51°
3
78°
51°
4
81°
50°
5
69°
48°
6
66°
49°
7
65°
46°
8
66°
50°
9
67°
50°
10
64°
49°
11
62°
51°
12
57°
45°
13
60°
48°
14
64°
48°
15
63°
47°
16
64°
48°
17
57°
43°
18
59°
47°
19
57°
46°
20
57°
47°
21
58°
48°
22
57°
46°
23
57°
48°
24
59°
49°
25
63°
50°
26
60°
46°
27
59°
46°
28
58°
43°
29
58°
46°
30
59°
45°
31
57°
44°
1
58°
43°
2
62°
48°
3
66°
50°
4
64°
51°
5
61°
50°
6
62°
50°
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 57° to 81°, with overnight lows between 43° and 51°. The average high for May is 62° with an average low of 48°. 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.
