S
M
T
W
T
F
S
26
84°
68°
27
85°
73°
28
84°
73°
29
86°
71°
30
77°
70°
1
73°
59°
2
73°
57°
3
75°
55°
4
77°
57°
5
83°
63°
6
88°
74°
7
77°
70°
8
77°
70°
9
77°
73°
10
85°
70°
11
83°
60°
12
80°
61°
13
84°
66°
14
87°
71°
15
88°
71°
16
86°
73°
17
84°
72°
18
83°
70°
19
86°
69°
20
83°
72°
21
85°
71°
22
85°
72°
23
87°
72°
24
87°
71°
25
84°
72°
26
84°
72°
27
85°
71°
28
85°
72°
29
84°
72°
30
84°
71°
31
85°
71°
1
85°
72°
2
86°
73°
3
85°
73°
4
83°
74°
5
84°
74°
6
85°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Norco
Norco's May 2026 forecast shows daily high temperatures ranging from 77° to 88°, with overnight lows between 60° and 74°. The average high for May is 84° with an average low of 71°. 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 Norco. See also: June | July | August.
