S
M
T
W
T
F
S
31
73°
58°
1
73°
53°
2
77°
55°
3
73°
54°
4
72°
53°
5
75°
54°
6
75°
56°
7
76°
56°
8
78°
57°
9
75°
59°
10
78°
57°
11
75°
58°
12
77°
62°
13
80°
60°
14
78°
58°
15
76°
58°
16
76°
59°
17
77°
58°
18
79°
62°
19
82°
61°
20
77°
60°
21
78°
61°
22
78°
61°
23
80°
62°
24
81°
65°
25
78°
65°
26
81°
64°
27
78°
63°
28
79°
63°
29
80°
62°
30
79°
61°
1
80°
64°
2
83°
67°
3
80°
67°
4
80°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Nagano-shi
Nagano-shi's June 2026 forecast shows daily high temperatures ranging from 72° to 83°, with overnight lows between 53° and 67°. The average high for June is 78° with an average low of 60°. 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 Nagano-shi. See also: July | August | September.