S
M
T
W
T
F
S
29
69°
36°
30
72°
34°
31
34°
25°
1
34°
25°
2
51°
30°
3
36°
22°
4
44°
26°
5
55°
30°
6
39°
21°
7
61°
20°
8
50°
25°
9
50°
23°
10
54°
21°
11
72°
34°
12
67°
37°
13
62°
38°
14
61°
34°
15
70°
52°
16
67°
24°
17
34°
21°
18
43°
29°
19
67°
35°
20
78°
43°
21
76°
43°
22
67°
39°
23
53°
30°
24
57°
33°
25
60°
35°
26
61°
34°
27
58°
31°
28
53°
31°
29
52°
37°
30
58°
38°
1
52°
38°
2
52°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Keystone
Keystone's April 2026 forecast shows daily high temperatures ranging from 34° to 78°, with overnight lows between 21° and 52°. The average high for April is 59° 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 Keystone. See also: May | June | July.
