S
M
T
W
T
F
S
29
72°
54°
30
73°
53°
31
78°
49°
1
81°
46°
2
79°
50°
3
80°
56°
4
80°
54°
5
79°
49°
6
83°
51°
7
83°
56°
8
85°
56°
9
77°
55°
10
82°
52°
11
85°
52°
12
86°
53°
13
82°
54°
14
85°
56°
15
85°
49°
16
81°
59°
17
86°
52°
18
83°
49°
19
86°
48°
20
83°
55°
21
81°
52°
22
67°
55°
23
65°
44°
24
67°
43°
25
68°
48°
26
71°
43°
27
71°
39°
28
69°
45°
29
67°
46°
30
70°
48°
1
68°
48°
2
71°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in San Martin
San Martin's April 2026 forecast shows daily high temperatures ranging from 65° to 71°, with overnight lows between 39° and 48°. The average high for April is 69° with an average low of 45°. 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 Martin. See also: May | June | July.