S
M
T
W
T
F
S
29
76°
40°
30
79°
56°
31
82°
64°
1
84°
67°
2
85°
63°
3
86°
68°
4
83°
63°
5
67°
52°
6
67°
45°
7
71°
43°
8
73°
49°
9
76°
48°
10
79°
54°
11
83°
55°
12
88°
60°
13
86°
63°
14
83°
62°
15
83°
59°
16
69°
49°
17
73°
50°
18
77°
56°
19
73°
49°
20
77°
56°
21
78°
57°
22
77°
56°
23
76°
55°
24
78°
56°
25
78°
55°
26
79°
58°
27
78°
56°
28
75°
54°
29
77°
55°
30
70°
57°
1
70°
56°
2
73°
57°
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 67° to 88°, with overnight lows between 43° and 63°. The average high for April is 77° with an average low of 54°. 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.
