S
M
T
W
T
F
S
26
61°
48°
27
67°
44°
28
74°
43°
29
77°
46°
30
79°
45°
1
78°
48°
2
65°
51°
3
66°
52°
4
68°
46°
5
65°
52°
6
75°
54°
7
73°
51°
8
77°
51°
9
81°
48°
10
82°
50°
11
84°
51°
12
73°
50°
13
80°
48°
14
83°
49°
15
84°
51°
16
82°
51°
17
77°
46°
18
88°
61°
19
91°
53°
20
89°
52°
21
91°
49°
22
75°
48°
23
74°
53°
24
70°
52°
25
62°
50°
26
75°
49°
27
77°
46°
28
74°
52°
29
72°
53°
30
77°
52°
31
83°
50°
1
88°
53°
2
84°
51°
3
94°
52°
4
91°
54°
5
92°
52°
6
85°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Calistoga
Calistoga's May 2026 forecast shows daily high temperatures ranging from 84° to 94°, with overnight lows between 51° and 54°. The average high for May is 89° 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 Calistoga. See also: June | July | August.
