S
M
T
W
T
F
S
26
58°
46°
27
65°
46°
28
71°
46°
29
77°
49°
30
82°
51°
1
81°
54°
2
75°
53°
3
66°
51°
4
56°
49°
5
71°
49°
6
78°
52°
7
82°
51°
8
82°
51°
9
86°
55°
10
89°
58°
11
92°
56°
12
90°
55°
13
86°
54°
14
83°
50°
15
81°
52°
16
80°
52°
17
78°
51°
18
76°
51°
19
77°
49°
20
72°
47°
21
73°
49°
22
73°
48°
23
75°
50°
24
75°
51°
25
74°
50°
26
74°
50°
27
78°
51°
28
75°
51°
29
81°
55°
30
83°
55°
31
83°
54°
1
82°
56°
2
80°
55°
3
77°
53°
4
76°
54°
5
76°
54°
6
77°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Kelseyville
Kelseyville's May 2026 forecast shows daily high temperatures ranging from 72° to 92°, with overnight lows between 47° and 58°. The average high for May is 80° with an average low of 52°. 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 Kelseyville. See also: June | July | August.
