S
M
T
W
T
F
S
30
99°
77°
31
99°
77°
1
99°
76°
2
102°
78°
3
100°
81°
4
99°
78°
5
99°
82°
6
97°
76°
7
100°
76°
8
99°
78°
9
98°
78°
10
99°
77°
11
100°
81°
12
99°
81°
13
99°
81°
14
99°
78°
15
99°
77°
16
96°
76°
17
96°
78°
18
91°
79°
19
93°
76°
20
94°
74°
21
96°
75°
22
95°
76°
23
96°
77°
24
95°
76°
25
95°
76°
26
94°
76°
27
93°
77°
28
95°
75°
29
95°
74°
30
90°
72°
1
89°
71°
2
91°
72°
3
87°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in St. Paul
St. Paul's September 2026 forecast shows daily high temperatures ranging from 87° to 96°, with overnight lows between 70° and 77°. The average high for September is 93° with an average low of 74°. 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 St. Paul. See also: October | November | December.
