S
M
T
W
T
F
S
26
92°
63°
27
90°
64°
28
91°
64°
29
90°
62°
30
90°
60°
1
91°
60°
2
91°
60°
3
92°
60°
4
92°
61°
5
91°
63°
6
93°
62°
7
92°
63°
8
92°
63°
9
91°
65°
10
92°
66°
11
91°
67°
12
91°
66°
13
92°
64°
14
93°
64°
15
93°
64°
16
92°
64°
17
92°
64°
18
94°
68°
19
94°
68°
20
95°
67°
21
94°
68°
22
95°
68°
23
95°
67°
24
94°
69°
25
95°
67°
26
94°
68°
27
95°
69°
28
96°
70°
29
96°
70°
30
94°
68°
31
92°
68°
1
94°
68°
2
95°
69°
3
94°
69°
4
95°
67°
5
96°
69°
6
96°
69°
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 90° to 96°, with overnight lows between 60° and 70°. The average high for May is 93° with an average low of 66°. 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.
