S
M
T
W
T
F
S
26
84°
57°
27
84°
55°
28
79°
61°
29
75°
59°
30
64°
50°
1
68°
45°
2
66°
45°
3
70°
50°
4
80°
57°
5
74°
63°
6
70°
52°
7
66°
42°
8
68°
49°
9
71°
47°
10
72°
55°
11
70°
50°
12
72°
49°
13
75°
51°
14
77°
56°
15
75°
53°
16
77°
54°
17
79°
58°
18
80°
58°
19
81°
59°
20
77°
58°
21
78°
54°
22
74°
51°
23
73°
50°
24
74°
51°
25
75°
54°
26
75°
51°
27
74°
52°
28
76°
53°
29
77°
55°
30
81°
61°
31
80°
62°
1
77°
61°
2
78°
60°
3
78°
58°
4
79°
58°
5
81°
63°
6
84°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Columbia
Columbia's May 2026 forecast shows daily high temperatures ranging from 66° to 84°, with overnight lows between 42° and 63°. The average high for May is 76° with an average low of 55°. 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 Columbia. See also: June | July | August.