S
M
T
W
T
F
S
29
67°
38°
30
45°
27°
31
44°
23°
1
50°
36°
2
40°
30°
3
49°
26°
4
58°
25°
5
66°
31°
6
65°
37°
7
67°
32°
8
60°
31°
9
43°
24°
10
47°
23°
11
54°
28°
12
60°
29°
13
63°
31°
14
54°
26°
15
56°
32°
16
57°
31°
17
59°
32°
18
60°
33°
19
60°
32°
20
58°
29°
21
49°
25°
22
48°
23°
23
48°
23°
24
49°
26°
25
49°
24°
26
50°
29°
27
50°
28°
28
51°
24°
29
57°
30°
30
61°
30°
1
63°
35°
2
64°
34°
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 40° to 67°, with overnight lows between 23° and 37°. The average high for April is 55° with an average low of 29°. 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.
