S
M
T
W
T
F
S
29
80°
38°
30
83°
63°
31
85°
65°
1
84°
65°
2
83°
68°
3
86°
65°
4
79°
62°
5
66°
49°
6
72°
41°
7
77°
53°
8
77°
54°
9
79°
55°
10
81°
55°
11
85°
59°
12
86°
64°
13
83°
68°
14
85°
68°
15
81°
64°
16
79°
60°
17
82°
66°
18
84°
65°
19
86°
66°
20
75°
56°
21
79°
63°
22
77°
61°
23
79°
61°
24
79°
62°
25
80°
62°
26
80°
63°
27
79°
62°
28
78°
62°
29
78°
62°
30
76°
63°
1
80°
64°
2
78°
63°
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 75° to 86°, with overnight lows between 53° and 68°. 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.
