S
M
T
W
T
F
S
29
38°
36°
30
78°
59°
31
84°
66°
1
85°
63°
2
83°
63°
3
83°
65°
4
80°
52°
5
59°
39°
6
67°
36°
7
57°
45°
8
72°
38°
9
80°
50°
10
79°
56°
11
75°
57°
12
84°
65°
13
77°
64°
14
82°
60°
15
83°
61°
16
80°
56°
17
77°
48°
18
71°
48°
19
72°
52°
20
74°
55°
21
73°
54°
22
71°
43°
23
69°
50°
24
73°
51°
25
72°
49°
26
69°
46°
27
68°
46°
28
67°
47°
29
75°
51°
30
74°
53°
1
72°
52°
2
68°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Clarkson
Clarkson's April 2026 forecast shows daily high temperatures ranging from 67° to 84°, with overnight lows between 43° and 65°. The average high for April is 74° with an average low of 53°. 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 Clarkson. See also: May | June | July.