S
M
T
W
T
F
S
31
72°
42°
1
83°
53°
2
88°
56°
3
70°
54°
4
72°
50°
5
68°
50°
6
67°
46°
7
67°
50°
8
73°
54°
9
75°
53°
10
76°
55°
11
76°
53°
12
78°
54°
13
82°
57°
14
75°
52°
15
68°
51°
16
71°
53°
17
80°
57°
18
74°
56°
19
71°
50°
20
75°
52°
21
80°
58°
22
82°
58°
23
80°
52°
24
72°
51°
25
74°
53°
26
79°
52°
27
73°
51°
28
72°
50°
29
74°
52°
30
81°
54°
1
77°
52°
2
82°
57°
3
85°
60°
4
84°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Lake Oswego
Lake Oswego's June 2026 forecast shows daily high temperatures ranging from 67° to 88°, with overnight lows between 46° and 60°. The average high for June is 76° with an average low of 53°. 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 Lake Oswego. See also: July | August | September.
