S
M
T
W
T
F
S
31
84°
50°
1
79°
49°
2
81°
50°
3
79°
49°
4
78°
46°
5
83°
45°
6
79°
44°
7
77°
48°
8
80°
50°
9
85°
47°
10
77°
45°
11
77°
50°
12
79°
51°
13
85°
52°
14
86°
49°
15
85°
52°
16
89°
51°
17
92°
56°
18
91°
53°
19
90°
54°
20
92°
53°
21
86°
51°
22
84°
50°
23
82°
48°
24
90°
53°
25
87°
52°
26
90°
54°
27
89°
52°
28
90°
54°
29
87°
57°
30
94°
57°
1
94°
55°
2
87°
55°
3
89°
56°
4
90°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Longmont
Longmont's June 2026 forecast shows daily high temperatures ranging from 77° to 94°, with overnight lows between 44° and 57°. The average high for June is 85° with an average low of 51°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in Longmont. See also: July | August | September.
