S
M
T
W
T
F
S
29
82°
43°
30
82°
50°
31
61°
39°
1
52°
35°
2
72°
35°
3
55°
33°
4
62°
25°
5
67°
29°
6
65°
31°
7
74°
32°
8
69°
40°
9
75°
32°
10
61°
35°
11
78°
36°
12
75°
42°
13
72°
46°
14
57°
41°
15
68°
36°
16
75°
42°
17
50°
26°
18
59°
26°
19
73°
26°
20
81°
32°
21
84°
38°
22
85°
44°
23
64°
47°
24
74°
35°
25
53°
31°
26
51°
37°
27
55°
35°
28
61°
38°
29
58°
31°
30
49°
34°
1
64°
28°
2
73°
30°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Longmont
Longmont's April 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for April is ° with an average low of °. 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 Longmont. See also: May | June | July.
