S
M
T
W
T
F
S
26
61°
50°
27
68°
44°
28
74°
43°
29
77°
47°
30
78°
44°
1
76°
50°
2
63°
52°
3
66°
54°
4
67°
46°
5
65°
53°
6
75°
55°
7
72°
52°
8
77°
52°
9
81°
48°
10
80°
52°
11
83°
49°
12
74°
51°
13
79°
47°
14
82°
49°
15
83°
50°
16
82°
54°
17
80°
46°
18
88°
62°
19
92°
48°
20
89°
51°
21
88°
49°
22
73°
49°
23
72°
54°
24
69°
53°
25
61°
52°
26
74°
50°
27
74°
47°
28
76°
53°
29
70°
54°
30
78°
45°
31
85°
48°
1
85°
51°
2
76°
50°
3
91°
53°
4
85°
51°
5
82°
51°
6
81°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Santa Rosa
Santa Rosa's May 2026 forecast shows daily high temperatures ranging from 76° to 91°, with overnight lows between 45° and 53°. The average high for May is 83° 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 Santa Rosa. See also: June | July | August.
