S
M
T
W
T
F
S
26
71°
48°
27
72°
45°
28
79°
50°
29
83°
56°
30
86°
61°
1
89°
64°
2
89°
62°
3
89°
61°
4
75°
59°
5
74°
52°
6
83°
54°
7
94°
65°
8
100°
71°
9
99°
69°
10
101°
70°
11
103°
72°
12
99°
78°
13
94°
63°
14
94°
65°
15
98°
70°
16
95°
61°
17
91°
64°
18
84°
61°
19
91°
67°
20
91°
68°
21
90°
69°
22
92°
66°
23
90°
67°
24
86°
65°
25
86°
63°
26
90°
66°
27
83°
61°
28
84°
62°
29
85°
62°
30
87°
64°
31
92°
68°
1
95°
70°
2
96°
73°
3
96°
73°
4
95°
65°
5
87°
66°
6
90°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Kelso
Kelso's May 2026 forecast shows daily high temperatures ranging from 83° to 98°, with overnight lows between 61° and 73°. The average high for May is 90° with an average low of 66°. 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 Kelso. See also: June | July | August.
