S
M
T
W
T
F
S
26
79°
41°
27
74°
41°
28
81°
44°
29
82°
45°
30
78°
51°
1
64°
49°
2
69°
46°
3
77°
37°
4
80°
52°
5
64°
50°
6
73°
41°
7
76°
39°
8
86°
38°
9
90°
46°
10
87°
59°
11
88°
48°
12
94°
51°
13
93°
52°
14
91°
58°
15
90°
61°
16
90°
56°
17
88°
51°
18
86°
61°
19
87°
47°
20
84°
54°
21
84°
48°
22
86°
52°
23
86°
58°
24
90°
55°
25
82°
54°
26
76°
53°
27
86°
52°
28
87°
57°
29
88°
56°
30
87°
53°
31
91°
59°
1
95°
66°
2
86°
58°
3
82°
59°
4
87°
59°
5
87°
63°
6
88°
61°
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 82° to 95°, with overnight lows between 53° and 66°. The average high for May is 88° with an average low of 59°. 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.
