S
M
T
W
T
F
S
29
66°
25°
30
70°
53°
31
79°
60°
1
77°
58°
2
84°
54°
3
76°
61°
4
84°
55°
5
71°
43°
6
55°
34°
7
47°
26°
8
66°
37°
9
73°
43°
10
75°
51°
11
68°
44°
12
77°
57°
13
79°
59°
14
77°
58°
15
73°
49°
16
66°
46°
17
71°
53°
18
70°
50°
19
69°
48°
20
71°
40°
21
70°
47°
22
71°
49°
23
73°
48°
24
71°
46°
25
65°
42°
26
62°
47°
27
65°
43°
28
62°
43°
29
62°
39°
30
61°
38°
1
64°
42°
2
63°
40°
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 47° to 79°, with overnight lows between 26° and 59°. The average high for April is 68° with an average low of 46°. 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.
