S
M
T
W
T
F
S
26
87°
57°
27
78°
56°
28
67°
52°
29
87°
61°
30
78°
59°
1
72°
53°
2
74°
47°
3
75°
39°
4
80°
41°
5
82°
47°
6
87°
58°
7
80°
64°
8
71°
54°
9
72°
57°
10
84°
59°
11
86°
59°
12
71°
59°
13
82°
59°
14
80°
51°
15
80°
45°
16
87°
50°
17
91°
64°
18
88°
59°
19
88°
58°
20
91°
65°
21
90°
64°
22
91°
66°
23
87°
69°
24
83°
66°
25
80°
69°
26
83°
68°
27
84°
69°
28
86°
70°
29
85°
67°
30
82°
62°
31
78°
61°
1
81°
62°
2
82°
62°
3
81°
63°
4
84°
64°
5
83°
67°
6
84°
65°
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 78° to 86°, with overnight lows between 61° and 70°. The average high for May is 83° with an average low of 65°. 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.
