S
M
T
W
T
F
S
26
56°
44°
27
60°
45°
28
71°
40°
29
76°
46°
30
79°
51°
1
84°
55°
2
86°
57°
3
77°
54°
4
61°
49°
5
61°
51°
6
76°
46°
7
85°
53°
8
83°
62°
9
87°
61°
10
97°
58°
11
98°
62°
12
97°
62°
13
78°
62°
14
82°
60°
15
83°
62°
16
75°
62°
17
70°
56°
18
76°
50°
19
80°
51°
20
85°
53°
21
88°
58°
22
87°
62°
23
89°
64°
24
86°
61°
25
82°
60°
26
65°
53°
27
64°
48°
28
64°
48°
29
69°
48°
30
78°
51°
31
87°
53°
1
95°
62°
2
96°
62°
3
97°
63°
4
98°
62°
5
96°
63°
6
94°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lake Isabella
Lake Isabella's May 2026 forecast shows daily high temperatures ranging from 64° to 98°, with overnight lows between 48° and 63°. The average high for May is 85° with an average low of 56°. 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 Isabella. See also: June | July | August.