S
M
T
W
T
F
S
26
66°
50°
27
70°
45°
28
75°
45°
29
81°
48°
30
84°
50°
1
82°
54°
2
76°
51°
3
70°
52°
4
67°
51°
5
68°
53°
6
78°
57°
7
85°
56°
8
80°
55°
9
81°
57°
10
88°
60°
11
83°
56°
12
87°
59°
13
87°
59°
14
80°
51°
15
75°
52°
16
76°
52°
17
77°
50°
18
75°
54°
19
75°
49°
20
78°
51°
21
81°
54°
22
85°
57°
23
86°
59°
24
87°
59°
25
87°
58°
26
86°
56°
27
85°
56°
28
81°
54°
29
79°
53°
30
78°
52°
31
79°
52°
1
79°
53°
2
83°
54°
3
85°
58°
4
86°
60°
5
85°
57°
6
82°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Folsom
Folsom's May 2026 forecast shows daily high temperatures ranging from 67° to 88°, with overnight lows between 49° and 60°. The average high for May is 81° with an average low of 55°. 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 Folsom. See also: June | July | August.