S
M
T
W
T
F
S
26
63°
49°
27
71°
45°
28
76°
39°
29
81°
42°
30
82°
42°
1
80°
47°
2
67°
52°
3
67°
52°
4
69°
48°
5
68°
51°
6
80°
54°
7
78°
52°
8
81°
51°
9
85°
45°
10
83°
50°
11
87°
47°
12
77°
50°
13
83°
46°
14
86°
45°
15
89°
47°
16
80°
53°
17
76°
47°
18
87°
56°
19
92°
42°
20
91°
45°
21
93°
45°
22
79°
48°
23
73°
53°
24
72°
52°
25
71°
51°
26
73°
51°
27
77°
42°
28
75°
52°
29
76°
54°
30
81°
53°
31
87°
45°
1
92°
46°
2
81°
50°
3
92°
48°
4
90°
48°
5
96°
49°
6
84°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Healdsburg
Healdsburg's May 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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 Healdsburg. See also: June | July | August.