S
M
T
W
T
F
S
26
98°
69°
27
98°
68°
28
97°
68°
29
98°
67°
30
99°
69°
31
98°
69°
1
97°
68°
2
98°
69°
3
98°
68°
4
97°
67°
5
96°
68°
6
95°
68°
7
97°
67°
8
98°
68°
9
98°
68°
10
97°
67°
11
97°
63°
12
92°
61°
13
91°
61°
14
92°
62°
15
95°
66°
16
97°
67°
17
96°
61°
18
94°
61°
19
95°
66°
20
94°
67°
21
97°
66°
22
96°
64°
23
96°
63°
24
97°
62°
25
95°
61°
26
94°
61°
27
94°
62°
28
95°
60°
29
94°
60°
30
94°
61°
31
95°
60°
1
93°
59°
2
92°
59°
3
92°
60°
4
93°
60°
5
92°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in San Jacinto
San Jacinto's August 2026 forecast shows daily high temperatures ranging from 91° to 99°, with overnight lows between 59° and 69°. The average high for August is 96° with an average low of 64°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in San Jacinto. See also: September | October | November.
