S
M
T
W
T
F
S
30
86°
66°
31
85°
66°
1
84°
65°
2
85°
66°
3
82°
59°
4
82°
57°
5
80°
57°
6
82°
58°
7
86°
59°
8
87°
64°
9
87°
64°
10
81°
57°
11
80°
56°
12
81°
57°
13
82°
55°
14
80°
54°
15
78°
54°
16
77°
53°
17
78°
54°
18
79°
55°
19
82°
58°
20
83°
59°
21
84°
61°
22
84°
61°
23
83°
60°
24
79°
59°
25
80°
59°
26
82°
60°
27
83°
58°
28
82°
58°
29
83°
57°
30
83°
58°
1
82°
59°
2
82°
55°
3
81°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Calistia
Calistia's September 2026 forecast shows daily high temperatures ranging from 77° to 87°, with overnight lows between 49° and 66°. The average high for September is 82° with an average low of 58°. 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 Calistia. See also: October | November | December.