S
M
T
W
T
F
S
30
56°
47°
31
54°
48°
1
55°
50°
2
53°
49°
3
51°
46°
4
51°
47°
5
50°
47°
6
49°
47°
7
54°
47°
8
55°
46°
9
52°
48°
10
53°
49°
11
52°
45°
12
52°
47°
13
52°
47°
14
53°
46°
15
52°
45°
16
51°
46°
17
52°
45°
18
51°
44°
19
50°
45°
20
51°
44°
21
52°
43°
22
51°
44°
23
45°
35°
24
49°
43°
25
49°
43°
26
48°
42°
27
48°
42°
28
46°
41°
29
46°
41°
30
45°
40°
1
47°
41°
2
48°
42°
3
48°
41°
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 45° to 53°, with overnight lows between 35° and 49°. The average high for September is 50° with an average low of 43°. 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.
