S
M
T
W
T
F
S
26
66°
52°
27
72°
47°
28
78°
46°
29
78°
50°
30
86°
52°
1
86°
54°
2
73°
55°
3
73°
54°
4
67°
55°
5
63°
52°
6
75°
74°
7
84°
55°
8
85°
53°
9
81°
55°
10
90°
55°
11
95°
57°
12
91°
59°
13
77°
58°
14
91°
53°
15
88°
55°
16
77°
59°
17
78°
58°
18
86°
61°
19
91°
56°
20
88°
57°
21
97°
58°
22
94°
57°
23
78°
55°
24
85°
54°
25
78°
54°
26
74°
56°
27
71°
53°
28
70°
53°
29
75°
53°
30
83°
51°
31
91°
57°
1
89°
61°
2
90°
60°
3
88°
60°
4
92°
59°
5
91°
61°
6
85°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Rancho Calaveras
Rancho Calaveras's May 2026 forecast shows daily high temperatures ranging from 70° to 92°, with overnight lows between 51° and 61°. The average high for May is 84° with an average low of 57°. 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 Rancho Calaveras. See also: June | July | August.