S
M
T
W
T
F
S
29
60°
27°
30
71°
46°
31
82°
61°
1
85°
59°
2
58°
44°
3
74°
44°
4
82°
49°
5
73°
48°
6
61°
39°
7
57°
36°
8
52°
30°
9
56°
36°
10
69°
52°
11
66°
41°
12
63°
52°
13
76°
62°
14
86°
66°
15
87°
64°
16
81°
57°
17
72°
47°
18
65°
51°
19
68°
50°
20
69°
53°
21
74°
46°
22
72°
47°
23
62°
44°
24
62°
52°
25
66°
52°
26
62°
48°
27
63°
46°
28
63°
47°
29
64°
45°
30
63°
45°
1
65°
54°
2
74°
54°
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 56° to 87°, with overnight lows between 36° and 66°. The average high for April is 69° with an average low of 50°. 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.
