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
69°
52°
5
68°
52°
6
75°
51°
7
73°
47°
8
80°
50°
9
85°
53°
10
86°
53°
11
88°
53°
12
84°
51°
13
80°
53°
14
78°
51°
15
81°
52°
16
79°
50°
17
74°
48°
18
77°
51°
19
78°
52°
20
79°
52°
21
77°
50°
22
76°
52°
23
78°
52°
24
79°
53°
25
79°
52°
26
78°
50°
27
72°
51°
28
72°
50°
29
73°
52°
30
73°
52°
31
74°
53°
1
76°
53°
2
79°
54°
3
76°
53°
4
73°
52°
5
74°
51°
6
73°
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 68° to 88°, with overnight lows between 47° and 54°. The average high for May is 77° with an average low of 52°. 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.
