S
M
T
W
T
F
S
26
65°
33°
27
70°
43°
28
70°
47°
29
58°
45°
30
56°
34°
1
50°
33°
2
47°
31°
3
55°
35°
4
54°
33°
5
60°
41°
6
55°
39°
7
56°
30°
8
54°
34°
9
53°
32°
10
53°
32°
11
54°
33°
12
55°
34°
13
56°
39°
14
55°
40°
15
54°
38°
16
55°
37°
17
56°
36°
18
56°
38°
19
57°
35°
20
58°
36°
21
59°
41°
22
63°
45°
23
60°
41°
24
60°
46°
25
61°
42°
26
60°
40°
27
64°
44°
28
68°
48°
29
65°
49°
30
66°
49°
31
63°
48°
1
62°
46°
2
66°
46°
3
71°
50°
4
70°
49°
5
69°
43°
6
67°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lost River
Lost River's May 2026 forecast shows daily high temperatures ranging from 47° to 71°, with overnight lows between 30° and 50°. The average high for May is 60° with an average low of 40°. 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 Lost River. See also: June | July | August.
