S
M
T
W
T
F
S
29
84°
53°
30
72°
57°
31
68°
59°
1
62°
57°
2
63°
48°
3
74°
45°
4
72°
48°
5
79°
52°
6
63°
50°
7
64°
53°
8
67°
52°
9
73°
54°
10
66°
57°
11
62°
55°
12
58°
51°
13
64°
50°
14
62°
52°
15
61°
50°
16
67°
51°
17
72°
56°
18
66°
46°
19
72°
51°
20
68°
50°
21
63°
53°
22
62°
49°
23
69°
49°
24
64°
51°
25
58°
53°
26
63°
54°
27
63°
52°
28
67°
51°
29
65°
50°
30
70°
53°
1
68°
52°
2
64°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in San Mateo
San Mateo's April 2026 forecast shows daily high temperatures ranging from 64° to 70°, with overnight lows between 52° and 53°. The average high for April is 67° 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 April weather will actually feel in San Mateo. See also: May | June | July.
