S
M
T
W
T
F
S
29
66°
41°
30
43°
34°
31
57°
34°
1
55°
43°
2
50°
30°
3
66°
21°
4
75°
30°
5
77°
37°
6
77°
43°
7
72°
41°
8
72°
34°
9
73°
41°
10
64°
41°
11
59°
39°
12
50°
39°
13
54°
32°
14
54°
32°
15
48°
28°
16
50°
25°
17
61°
19°
18
73°
34°
19
72°
41°
20
75°
43°
21
55°
41°
22
44°
29°
23
60°
30°
24
53°
24°
25
49°
25°
26
50°
29°
27
52°
31°
28
58°
33°
29
57°
33°
30
63°
34°
1
61°
31°
2
53°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Sisters-Millican
Sisters-Millican's April 2026 forecast shows daily high temperatures ranging from 44° to 63°, with overnight lows between 24° and 34°. The average high for April is 55° with an average low of 30°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Sisters-Millican. See also: May | June | July.