S
M
T
W
T
F
S
26
58°
44°
27
71°
38°
28
69°
45°
29
67°
52°
30
74°
49°
1
71°
38°
2
63°
48°
3
64°
42°
4
79°
56°
5
86°
63°
6
78°
55°
7
61°
42°
8
66°
42°
9
64°
43°
10
69°
52°
11
74°
49°
12
71°
53°
13
72°
53°
14
76°
55°
15
74°
54°
16
73°
53°
17
78°
56°
18
78°
58°
19
79°
58°
20
79°
59°
21
78°
59°
22
74°
51°
23
70°
51°
24
70°
52°
25
71°
54°
26
74°
53°
27
72°
52°
28
72°
53°
29
73°
53°
30
73°
58°
31
76°
61°
1
78°
61°
2
74°
59°
3
75°
59°
4
80°
62°
5
82°
62°
6
82°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lake Arrowhead
Lake Arrowhead's May 2026 forecast shows daily high temperatures ranging from 61° to 86°, with overnight lows between 42° and 63°. The average high for May is 74° with an average low of 54°. 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 Lake Arrowhead. See also: June | July | August.
