S
M
T
W
T
F
S
30
70°
56°
31
70°
57°
1
73°
59°
2
75°
52°
3
74°
57°
4
78°
62°
5
76°
61°
6
73°
52°
7
80°
49°
8
87°
51°
9
94°
62°
10
95°
57°
11
79°
56°
12
78°
52°
13
81°
53°
14
82°
55°
15
76°
54°
16
76°
53°
17
79°
54°
18
82°
53°
19
81°
52°
20
80°
54°
21
82°
54°
22
84°
52°
23
80°
53°
24
80°
52°
25
76°
53°
26
82°
55°
27
76°
50°
28
77°
48°
29
78°
51°
30
82°
55°
1
83°
55°
2
83°
54°
3
82°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in San Juan Bautista
San Juan Bautista's September 2026 forecast shows daily high temperatures ranging from 76° to 95°, with overnight lows between 48° and 57°. The average high for September is 81° with an average low of 53°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in San Juan Bautista. See also: October | November | December.
