S
M
T
W
T
F
S
31
86°
69°
1
89°
69°
2
72°
72°
3
87°
67°
4
89°
70°
5
91°
71°
6
92°
72°
7
93°
71°
8
90°
68°
9
89°
72°
10
92°
70°
11
92°
64°
12
91°
66°
13
91°
68°
14
93°
64°
15
90°
64°
16
89°
63°
17
90°
67°
18
91°
68°
19
93°
71°
20
92°
69°
21
91°
68°
22
90°
71°
23
89°
72°
24
90°
71°
25
86°
72°
26
84°
72°
27
89°
68°
28
94°
68°
29
91°
72°
30
85°
68°
1
90°
67°
2
88°
70°
3
86°
67°
4
88°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Valparaiso
Valparaiso'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 Valparaiso. See also: October | November | December.
