S
M
T
W
T
F
S
29
68°
57°
30
78°
52°
31
82°
57°
1
75°
61°
2
74°
56°
3
62°
54°
4
65°
51°
5
76°
48°
6
71°
61°
7
67°
58°
8
68°
52°
9
69°
64°
10
67°
54°
11
57°
47°
12
59°
51°
13
66°
52°
14
66°
55°
15
69°
55°
16
N/A
17
60°
38°
18
64°
31°
19
66°
42°
20
72°
42°
21
71°
40°
22
69°
46°
23
71°
45°
24
72°
48°
25
71°
48°
26
64°
44°
27
63°
41°
28
62°
42°
29
61°
48°
30
67°
50°
1
64°
50°
2
61°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
April Weather in Thornton
Thornton's April 2026 forecast shows daily high temperatures ranging from 60° to 72°, with overnight lows between 31° and 50°. The average high for April is 66° with an average low of 44°. 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.
