S
M
T
W
T
F
S
26
57°
36°
27
48°
32°
28
55°
27°
29
55°
36°
30
59°
37°
1
66°
36°
2
68°
37°
3
73°
39°
4
73°
45°
5
68°
48°
6
70°
32°
7
73°
46°
8
75°
45°
9
73°
37°
10
75°
43°
11
81°
46°
12
84°
48°
13
79°
54°
14
66°
36°
15
64°
43°
16
57°
37°
17
54°
34°
18
59°
37°
19
63°
34°
20
66°
36°
21
70°
39°
22
70°
37°
23
75°
39°
24
77°
51°
25
80°
53°
26
71°
45°
27
72°
52°
28
78°
49°
29
65°
45°
30
69°
44°
31
74°
49°
1
78°
54°
2
81°
55°
3
82°
55°
4
79°
53°
5
78°
53°
6
73°
44°
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 65° to 82°, with overnight lows between 44° and 55°. The average high for May is 76° with an average low of 50°. 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.