S
M
T
W
T
F
S
29
82°
48°
30
82°
63°
31
86°
63°
1
87°
65°
2
80°
65°
3
82°
68°
4
70°
53°
5
68°
47°
6
71°
47°
7
72°
52°
8
79°
58°
9
80°
63°
10
78°
63°
11
80°
66°
12
78°
69°
13
82°
68°
14
83°
63°
15
80°
61°
16
77°
65°
17
83°
66°
18
85°
68°
19
86°
68°
20
79°
54°
21
81°
59°
22
80°
56°
23
74°
56°
24
82°
61°
25
82°
62°
26
83°
61°
27
83°
61°
28
81°
60°
29
78°
61°
30
77°
61°
1
78°
62°
2
77°
61°
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 72° to 86°, with overnight lows between 52° and 69°. The average high for April is 80° with an average low of 62°. 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.
