S
M
T
W
T
F
S
26
65°
49°
27
68°
49°
28
78°
42°
29
80°
45°
30
80°
48°
1
83°
52°
2
88°
53°
3
75°
52°
4
67°
48°
5
66°
48°
6
82°
54°
7
87°
56°
8
91°
57°
9
89°
57°
10
91°
54°
11
93°
56°
12
85°
55°
13
84°
57°
14
84°
56°
15
80°
53°
16
81°
56°
17
83°
57°
18
84°
58°
19
84°
58°
20
85°
57°
21
85°
58°
22
84°
58°
23
86°
59°
24
86°
59°
25
85°
58°
26
85°
58°
27
84°
56°
28
78°
55°
29
77°
54°
30
78°
54°
31
79°
56°
1
79°
57°
2
81°
56°
3
81°
56°
4
82°
56°
5
82°
56°
6
81°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in San Jacinto
San Jacinto's May 2026 forecast shows daily high temperatures ranging from 66° to 93°, with overnight lows between 48° and 59°. The average high for May is 83° with an average low of 56°. 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 San Jacinto. See also: June | July | August.
