S
M
T
W
T
F
S
26
64°
33°
27
66°
34°
28
61°
32°
29
53°
27°
30
52°
28°
1
54°
30°
2
54°
28°
3
55°
28°
4
56°
31°
5
55°
28°
6
54°
27°
7
56°
28°
8
57°
29°
9
61°
32°
10
66°
35°
11
68°
38°
12
68°
38°
13
65°
37°
14
64°
36°
15
65°
36°
16
58°
30°
17
57°
30°
18
59°
31°
19
61°
33°
20
61°
35°
21
59°
32°
22
60°
41°
23
60°
35°
24
59°
32°
25
58°
32°
26
59°
33°
27
62°
37°
28
66°
38°
29
65°
42°
30
68°
37°
31
64°
39°
1
66°
36°
2
63°
33°
3
65°
34°
4
65°
34°
5
66°
35°
6
70°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lostine
Lostine's May 2026 forecast shows daily high temperatures ranging from 52° to 70°, with overnight lows between 27° and 42°. The average high for May is 61° with an average low of 33°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Lostine. See also: June | July | August.
