S
M
T
W
T
F
S
31
81°
56°
1
82°
57°
2
83°
57°
3
73°
50°
4
72°
49°
5
80°
56°
6
76°
52°
7
71°
52°
8
70°
49°
9
70°
50°
10
72°
48°
11
77°
52°
12
82°
56°
13
83°
58°
14
85°
59°
15
85°
60°
16
79°
60°
17
77°
58°
18
76°
53°
19
79°
53°
20
81°
61°
21
90°
51°
22
84°
53°
23
84°
56°
24
85°
49°
25
79°
52°
26
82°
54°
27
87°
59°
28
91°
58°
29
87°
52°
30
81°
49°
1
80°
52°
2
83°
53°
3
90°
58°
4
93°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Lewiston
Lewiston's June 2026 forecast shows daily high temperatures ranging from 70° to 93°, with overnight lows between 48° and 61°. The average high for June is 81° with an average low of 54°. 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 Lewiston. See also: July | August | September.
