S
M
T
W
T
F
S
29
48°
32°
30
45°
22°
31
49°
18°
1
54°
27°
2
42°
35°
3
49°
29°
4
58°
22°
5
63°
27°
6
67°
42°
7
62°
37°
8
61°
34°
9
62°
31°
10
69°
41°
11
62°
41°
12
59°
42°
13
51°
36°
14
56°
39°
15
53°
40°
16
50°
37°
17
54°
37°
18
58°
38°
19
55°
38°
20
55°
36°
21
58°
34°
22
52°
31°
23
51°
30°
24
49°
28°
25
50°
30°
26
50°
30°
27
51°
31°
28
51°
32°
29
53°
30°
30
54°
32°
1
55°
33°
2
56°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Polson
Polson's April 2026 forecast shows daily high temperatures ranging from 49° to 69°, with overnight lows between 28° and 42°. The average high for April is 55° with an average low of 35°. 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 Polson. See also: May | June | July.