S
M
T
W
T
F
S
26
47°
36°
27
49°
34°
28
63°
29°
29
66°
35°
30
73°
42°
1
75°
43°
2
69°
48°
3
57°
41°
4
51°
38°
5
48°
40°
6
66°
50°
7
74°
46°
8
78°
46°
9
75°
47°
10
78°
45°
11
78°
46°
12
71°
43°
13
70°
44°
14
69°
44°
15
66°
40°
16
68°
43°
17
70°
45°
18
71°
45°
19
71°
44°
20
72°
45°
21
72°
45°
22
71°
46°
23
73°
46°
24
73°
45°
25
72°
46°
26
73°
46°
27
72°
43°
28
66°
43°
29
65°
42°
30
67°
42°
31
66°
44°
1
67°
46°
2
69°
45°
3
69°
45°
4
70°
46°
5
70°
45°
6
69°
42°
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 48° to 78°, with overnight lows between 38° and 50°. The average high for May is 69° with an average low of 44°. 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.
