S
M
T
W
T
F
S
26
62°
50°
27
69°
48°
28
75°
48°
29
78°
48°
30
81°
47°
1
72°
48°
2
66°
51°
3
67°
50°
4
66°
55°
5
67°
53°
6
68°
52°
7
70°
51°
8
75°
51°
9
80°
53°
10
81°
54°
11
80°
53°
12
84°
53°
13
84°
52°
14
78°
52°
15
77°
53°
16
73°
50°
17
77°
54°
18
76°
53°
19
77°
54°
20
78°
54°
21
76°
52°
22
75°
53°
23
78°
54°
24
78°
54°
25
77°
53°
26
78°
52°
27
71°
53°
28
71°
52°
29
72°
53°
30
72°
54°
31
73°
55°
1
75°
54°
2
78°
55°
3
76°
54°
4
73°
53°
5
73°
52°
6
72°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in San Rafael
San Rafael's May 2026 forecast shows daily high temperatures ranging from 66° to 84°, with overnight lows between 50° and 55°. The average high for May is 75° 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 San Rafael. See also: June | July | August.
