S
M
T
W
T
F
S
29
81°
54°
30
81°
57°
31
63°
41°
1
52°
37°
2
72°
37°
3
52°
34°
4
63°
30°
5
68°
34°
6
66°
39°
7
75°
32°
8
70°
46°
9
75°
37°
10
63°
36°
11
75°
44°
12
72°
46°
13
68°
42°
14
55°
41°
15
63°
43°
16
72°
34°
17
43°
25°
18
48°
30°
19
62°
40°
20
74°
45°
21
71°
42°
22
67°
41°
23
68°
41°
24
64°
35°
25
56°
31°
26
57°
32°
27
58°
32°
28
59°
36°
29
63°
39°
30
64°
42°
1
69°
42°
2
66°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Boulder
Boulder's April 2026 forecast shows daily high temperatures ranging from 43° to 75°, with overnight lows between 25° and 46°. The average high for April is 63° with an average low of 38°. 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 Boulder. See also: May | June | July.
