S
M
T
W
T
F
S
26
73°
51°
27
76°
51°
28
75°
50°
29
78°
52°
30
78°
51°
1
80°
52°
2
79°
53°
3
78°
51°
4
77°
53°
5
72°
48°
6
73°
51°
7
74°
53°
8
74°
52°
9
73°
47°
10
73°
47°
11
74°
48°
12
75°
49°
13
76°
54°
14
74°
49°
15
74°
50°
16
73°
49°
17
75°
50°
18
76°
52°
19
77°
58°
20
77°
57°
21
78°
58°
22
76°
53°
23
76°
52°
24
78°
53°
25
82°
56°
26
85°
59°
27
84°
58°
28
81°
59°
29
79°
59°
30
85°
58°
31
87°
60°
1
81°
59°
2
82°
58°
3
88°
58°
4
86°
56°
5
83°
55°
6
82°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Colusa
Colusa's May 2026 forecast shows daily high temperatures ranging from 72° to 88°, with overnight lows between 47° and 60°. The average high for May is 78° with an average low of 53°. 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 Colusa. See also: June | July | August.