S
M
T
W
T
F
S
26
65°
39°
27
69°
45°
28
69°
49°
29
73°
45°
30
76°
43°
1
78°
47°
2
81°
53°
3
85°
52°
4
86°
54°
5
84°
54°
6
84°
59°
7
81°
54°
8
74°
56°
9
77°
52°
10
76°
50°
11
77°
50°
12
83°
46°
13
68°
47°
14
65°
44°
15
59°
40°
16
63°
42°
17
67°
44°
18
70°
43°
19
72°
45°
20
76°
52°
21
76°
52°
22
72°
46°
23
75°
50°
24
77°
52°
25
75°
49°
26
70°
48°
27
70°
50°
28
71°
51°
29
72°
48°
30
68°
44°
31
70°
48°
1
76°
53°
2
77°
55°
3
78°
54°
4
77°
53°
5
75°
51°
6
77°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Chelan
Chelan's May 2026 forecast shows daily high temperatures ranging from 63° to 78°, with overnight lows between 42° and 55°. The average high for May is 73° with an average low of 49°. 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 Chelan. See also: June | July | August.