S
M
T
W
T
F
S
29
72°
32°
30
83°
35°
31
59°
38°
1
51°
33°
2
40°
34°
3
38°
32°
4
41°
33°
5
58°
30°
6
43°
26°
7
44°
19°
8
70°
35°
9
50°
27°
10
55°
31°
11
52°
36°
12
73°
50°
13
79°
53°
14
70°
49°
15
66°
46°
16
77°
43°
17
79°
36°
18
48°
28°
19
43°
34°
20
64°
21°
21
83°
41°
22
83°
40°
23
73°
52°
24
61°
40°
25
69°
39°
26
70°
49°
27
67°
44°
28
56°
39°
29
57°
40°
30
54°
35°
1
52°
31°
2
63°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Thornton
Thornton's April 2026 forecast shows daily high temperatures ranging from 52° to 63°, with overnight lows between 31° and 44°. The average high for April is 58° 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 Thornton. See also: May | June | July.
