S
M
T
W
T
F
S
26
89°
76°
27
90°
77°
28
91°
73°
29
91°
76°
30
91°
74°
1
91°
74°
2
93°
73°
3
90°
75°
4
92°
75°
5
90°
76°
6
91°
78°
7
94°
76°
8
92°
75°
9
93°
73°
10
92°
76°
11
92°
77°
12
93°
78°
13
91°
78°
14
92°
77°
15
92°
79°
16
90°
78°
17
91°
77°
18
92°
71°
19
92°
75°
20
91°
78°
21
92°
77°
22
93°
78°
23
89°
77°
24
93°
78°
25
91°
79°
26
91°
77°
27
91°
75°
28
92°
76°
29
91°
76°
30
91°
76°
31
91°
76°
1
93°
75°
2
90°
76°
3
90°
78°
4
89°
77°
5
89°
76°
6
91°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in San Fernando
San Fernando's May 2026 forecast shows daily high temperatures ranging from 89° to 93°, with overnight lows between 75° and 78°. The average high for May is 91° with an average low of 76°. 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 San Fernando. See also: June | July | August.
