S
M
T
W
T
F
S
31
78°
51°
1
71°
50°
2
80°
53°
3
82°
54°
4
77°
46°
5
76°
47°
6
70°
46°
7
71°
47°
8
76°
52°
9
81°
54°
10
85°
55°
11
83°
54°
12
82°
56°
13
88°
58°
14
80°
51°
15
73°
53°
16
75°
54°
17
84°
58°
18
85°
58°
19
81°
55°
20
83°
57°
21
85°
59°
22
87°
60°
23
88°
59°
24
85°
57°
25
85°
59°
26
87°
59°
27
81°
51°
28
76°
52°
29
79°
54°
30
85°
59°
1
87°
58°
2
87°
61°
3
90°
62°
4
91°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Grand Coulee
Grand Coulee's June 2026 forecast shows daily high temperatures ranging from 70° to 91°, with overnight lows between 46° and 63°. The average high for June is 82° with an average low of 55°. 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 Grand Coulee. See also: July | August | September.
