S
M
T
W
T
F
S
26
66°
55°
27
66°
54°
28
68°
50°
29
72°
50°
30
68°
55°
1
72°
55°
2
72°
59°
3
68°
59°
4
66°
55°
5
66°
55°
6
70°
54°
7
70°
54°
8
75°
61°
9
73°
59°
10
75°
57°
11
77°
55°
12
68°
57°
13
72°
61°
14
72°
61°
15
72°
61°
16
70°
59°
17
70°
59°
18
76°
50°
19
82°
51°
20
83°
50°
21
80°
51°
22
78°
52°
23
78°
53°
24
79°
52°
25
77°
50°
26
76°
48°
27
82°
49°
28
81°
48°
29
82°
47°
30
83°
48°
31
79°
47°
1
83°
50°
2
84°
50°
3
84°
49°
4
83°
50°
5
84°
50°
6
82°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in San Francisco
San Francisco's May 2026 forecast shows daily high temperatures ranging from 76° to 84°, with overnight lows between 47° and 53°. The average high for May is 81° with an average low of 50°. 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 Francisco. See also: June | July | August.
