S
M
T
W
T
F
S
29
54°
25°
30
63°
43°
31
69°
56°
1
58°
36°
2
70°
37°
3
73°
48°
4
78°
43°
5
56°
31°
6
41°
28°
7
34°
16°
8
55°
36°
9
68°
47°
10
62°
32°
11
49°
32°
12
66°
56°
13
68°
57°
14
69°
50°
15
51°
40°
16
58°
43°
17
60°
44°
18
61°
45°
19
66°
48°
20
67°
52°
21
66°
36°
22
55°
35°
23
53°
36°
24
54°
43°
25
60°
43°
26
60°
40°
27
53°
39°
28
55°
36°
29
58°
42°
30
64°
45°
1
61°
45°
2
64°
43°
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 49° to 69°, with overnight lows between 32° and 57°. The average high for April is 60° with an average low of 43°. 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.
