S
M
T
W
T
F
S
26
63°
30°
27
63°
36°
28
64°
34°
29
68°
32°
30
75°
36°
1
81°
41°
2
70°
41°
3
80°
46°
4
77°
47°
5
77°
46°
6
79°
43°
7
77°
41°
8
68°
39°
9
74°
38°
10
79°
40°
11
80°
43°
12
75°
39°
13
74°
39°
14
74°
40°
15
66°
34°
16
63°
39°
17
68°
36°
18
60°
32°
19
60°
30°
20
65°
35°
21
72°
40°
22
71°
38°
23
66°
37°
24
72°
41°
25
70°
38°
26
68°
37°
27
72°
42°
28
73°
42°
29
74°
41°
30
74°
42°
31
75°
43°
1
74°
42°
2
73°
41°
3
74°
40°
4
73°
36°
5
71°
36°
6
69°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sisters
Sisters's May 2026 forecast shows daily high temperatures ranging from 60° to 80°, with overnight lows between 30° and 47°. The average high for May is 72° with an average low of 39°. 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 Sisters. See also: June | July | August.
