S
M
T
W
T
F
S
29
81°
41°
30
84°
63°
31
88°
59°
1
88°
66°
2
82°
68°
3
88°
68°
4
70°
55°
5
68°
45°
6
73°
41°
7
77°
41°
8
82°
50°
9
82°
50°
10
84°
55°
11
86°
55°
12
77°
63°
13
82°
66°
14
84°
66°
15
84°
64°
16
86°
63°
17
90°
64°
18
73°
48°
19
N/A
20
79°
46°
21
77°
58°
22
75°
59°
23
80°
67°
24
79°
63°
25
79°
59°
26
76°
61°
27
78°
59°
28
74°
60°
29
76°
55°
30
75°
56°
1
76°
53°
2
75°
55°
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 74° to 80°, with overnight lows between 46° and 67°. The average high for April is 77° with an average low of 58°. 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.
