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September weather forecast in St. Louis
30 days
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
30 days
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun
Sunday
Mon
Monday
Tue
Tuesday
Wed
Wednesday
Thu
Thursday
Fri
Friday
Sat
Saturday
30
+29
+23
30 August, sun
+29
+23
Feels like
+30
751 mmHg
47%
4.4
m/s
S
30 August, Sunday. day, 29°; night, 23°; clear
31
+28
+23
31 August, mon
+28
+23
Feels like
+29
750 mmHg
57%
4.8
m/s
SE
31 August, Monday. day, 28°; night, 23°; clear
1
+28
+22
1 September, tue
+28
+22
Feels like
+29
750 mmHg
55%
5
m/s
S
1 September, Tuesday. day, 28°; night, 22°; partly cloudy
2
+28
+22
2 September, wed
+28
+22
Feels like
+29
750 mmHg
55%
4.5
m/s
W
2 September, Wednesday. day, 28°; night, 22°; clear
3
+27
+22
3 September, thu
+27
+22
Feels like
+28
750 mmHg
56%
4.3
m/s
NW
3 September, Thursday. day, 27°; night, 22°; partly cloudy
4
+26
+21
4 September, fri
+26
+21
Feels like
+27
750 mmHg
56%
5
m/s
NE
4 September, Friday. day, 26°; night, 21°; partly cloudy
5
+26
+20
5 September, sat
+26
+20
Feels like
+25
751 mmHg
55%
4.3
m/s
SE
5 September, Saturday. day, 26°; night, 20°; clear
6
+26
+20
6 September, sun
+26
+20
Feels like
+27
752 mmHg
54%
4.3
m/s
SW
6 September, Sunday. day, 26°; night, 20°; clear
7
+27
+21
7 September, mon
+27
+21
Feels like
+28
751 mmHg
56%
4.1
m/s
S
7 September, Monday. day, 27°; night, 21°; clear
8
+25
+21
8 September, tue
+25
+21
Feels like
+26
750 mmHg
64%
4
m/s
SE
8 September, Tuesday. day, 25°; night, 21°; clear
9
+25
+20
9 September, wed
+25
+20
Feels like
+26
751 mmHg
67%
4.5
m/s
E
9 September, Wednesday. day, 25°; night, 20°; clear
10
+24
+19
10 September, thu
+24
+19
Feels like
+24
752 mmHg
57%
3.9
m/s
N
10 September, Thursday. day, 24°; night, 19°; rain
11
+24
+18
11 September, fri
+24
+18
Feels like
+23
752 mmHg
54%
4.3
m/s
N
11 September, Friday. day, 24°; night, 18°; partly cloudy
12
+25
+18
12 September, sat
+25
+18
Feels like
+25
751 mmHg
52%
4
m/s
SE
12 September, Saturday. day, 25°; night, 18°; clear
13
+25
+18
13 September, sun
+25
+18
Feels like
+25
751 mmHg
51%
4.3
m/s
SE
13 September, Sunday. day, 25°; night, 18°; clear
14
+24
+19
14 September, mon
+24
+19
Feels like
+24
752 mmHg
56%
4.8
m/s
S
14 September, Monday. day, 24°; night, 19°; clear
15
+23
+19
15 September, tue
+23
+19
Feels like
+22
754 mmHg
62%
3.9
m/s
NE
15 September, Tuesday. day, 23°; night, 19°; clear
16
+23
+18
16 September, wed
+23
+18
Feels like
+23
753 mmHg
64%
3.5
m/s
E
16 September, Wednesday. day, 23°; night, 18°; partly cloudy
17
+25
+19
17 September, thu
+25
+19
Feels like
+27
751 mmHg
67%
3.5
m/s
S
17 September, Thursday. day, 25°; night, 19°; partly cloudy
18
+24
+21
18 September, fri
+24
+21
Feels like
+24
751 mmHg
56%
4.5
m/s
W
18 September, Friday. day, 24°; night, 21°; clear
19
+25
+20
19 September, sat
+25
+20
Feels like
+26
751 mmHg
58%
3.7
m/s
S
19 September, Saturday. day, 25°; night, 20°; clear
20
+25
+20
20 September, sun
+25
+20
Feels like
+25
751 mmHg
52%
4.1
m/s
SW
20 September, Sunday. day, 25°; night, 20°; clear
21
+24
+19
21 September, mon
+24
+19
Feels like
+24
752 mmHg
52%
4.1
m/s
S
21 September, Monday. day, 24°; night, 19°; partly cloudy
22
+25
+19
22 September, tue
+25
+19
Feels like
+24
753 mmHg
47%
3.5
m/s
SE
22 September, Tuesday. day, 25°; night, 19°; rain
23
+25
+19
23 September, wed
+25
+19
Feels like
+24
753 mmHg
50%
4.1
m/s
E
23 September, Wednesday. day, 25°; night, 19°; clear
24
+25
+19
24 September, thu
+25
+19
Feels like
+25
752 mmHg
51%
3.9
m/s
NW
24 September, Thursday. day, 25°; night, 19°; clear
25
+24
+19
25 September, fri
+24
+19
Feels like
+24
751 mmHg
56%
3.7
m/s
W
25 September, Friday. day, 24°; night, 19°; clear
26
+23
+18
26 September, sat
+23
+18
Feels like
+22
750 mmHg
56%
4.3
m/s
NW
26 September, Saturday. day, 23°; night, 18°; clear
27
+23
+18
27 September, sun
+23
+18
Feels like
+22
750 mmHg
51%
4
m/s
NW
27 September, Sunday. day, 23°; night, 18°; partly cloudy
28
+23
+19
28 September, mon
+23
+19
Feels like
+22
751 mmHg
50%
4.8
m/s
NW
28 September, Monday. day, 23°; night, 19°; clear
29
+22
+17
29 September, tue
+22
+17
Feels like
+20
752 mmHg
55%
4.4
m/s
N
29 September, Tuesday. day, 22°; night, 17°; rain
30
+21
+16
30 September, wed
+21
+16
Feels like
+19
751 mmHg
56%
4.9
m/s
E
30 September, Wednesday. day, 21°; night, 16°; clear
1
+20
+16
1 October, thu
+20
+16
Feels like
+18
750 mmHg
57%
4.9
m/s
N
1 October, Thursday. day, 20°; night, 16°; partly cloudy
2
+19
+15
2 October, fri
+19
+15
Feels like
+17
752 mmHg
57%
4.9
m/s
W
2 October, Friday. day, 19°; night, 15°; partly cloudy
3
+20
+14
3 October, sat
+20
+14
Feels like
+19
753 mmHg
58%
4.6
m/s
W
3 October, Saturday. day, 20°; night, 14°; partly cloudy
Average data for 10 years
St. Louis September
19
sunny days
3
days with precipitation
8
cloudy days
19 sunny days; 3 days with precipitation; 8 cloudy days;
56
%
air humidity
2.9
m/s
Wind
SW
65
mm of precipitation
(8% of annual average)
air humidity 56%; 65 millimeters of precipitation (8% of annual average); Wind south-westerly 2.9 Meters per second
Weather graphs for September
Temperature
Precipitation chance, %
Humidity, %
Wind, m/s
Pressure, mmHg
S
W
NW
NE
SE
SW
S
SE
E
N
N
SE
SE
S
NE
E
S
W
S
SW
S
SE
E
NW
W
NW
NW
NW
N
E
1
Average data for 10 years
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Daytime temperature
Night-time temperature
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