S
M
T
W
T
F
S
26
93°
70°
27
100°
67°
28
100°
72°
29
99°
70°
30
76°
64°
1
68°
56°
2
74°
53°
3
82°
56°
4
88°
59°
5
96°
65°
6
92°
72°
7
69°
58°
8
87°
59°
9
95°
62°
10
99°
66°
11
85°
62°
12
95°
59°
13
98°
64°
14
99°
65°
15
93°
71°
16
94°
70°
17
95°
72°
18
102°
75°
19
99°
72°
20
86°
67°
21
92°
66°
22
97°
61°
23
93°
69°
24
92°
63°
25
N/A
26
87°
67°
27
90°
69°
28
90°
70°
29
92°
70°
30
90°
68°
31
92°
68°
1
88°
65°
2
89°
66°
3
84°
65°
4
88°
69°
5
90°
68°
6
93°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in San Francisco
San Francisco's May 2026 forecast shows daily high temperatures ranging from 84° to 93°, with overnight lows between 65° and 70°. The average high for May is 89° with an average low of 68°. 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.
