S
M
T
W
T
F
S
30
76°
43°
31
84°
49°
1
68°
56°
2
63°
54°
3
60°
54°
4
64°
53°
5
70°
55°
6
67°
53°
7
73°
52°
8
82°
48°
9
89°
50°
10
84°
50°
11
71°
45°
12
64°
52°
13
65°
48°
14
71°
49°
15
70°
49°
16
83°
53°
17
85°
52°
18
75°
49°
19
77°
49°
20
77°
49°
21
74°
52°
22
72°
51°
23
75°
54°
24
74°
52°
25
73°
51°
26
71°
53°
27
69°
52°
28
71°
50°
29
70°
48°
30
64°
46°
1
64°
44°
2
64°
51°
3
65°
46°
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 64° to 85°, with overnight lows between 44° and 54°. The average high for September is 72° with an average low of 50°. 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.
