S
M
T
W
T
F
S
31
85°
72°
1
91°
72°
2
93°
72°
3
88°
73°
4
66°
66°
5
91°
91°
6
77°
77°
7
84°
70°
8
88°
68°
9
90°
62°
10
93°
60°
11
95°
66°
12
72°
70°
13
95°
69°
14
94°
68°
15
94°
71°
16
94°
67°
17
95°
71°
18
94°
71°
19
93°
72°
20
91°
70°
21
96°
73°
22
98°
74°
23
100°
76°
24
86°
71°
25
88°
71°
26
90°
59°
27
89°
59°
28
90°
62°
29
89°
61°
30
91°
64°
1
94°
64°
2
94°
66°
3
92°
66°
4
90°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Caldwell
Caldwell's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Caldwell. See also: October | November | December.
