10 day forecast
Monthly forecast
Weather map
City or area
Find
Sign up
Log in
Go to comparison
September weather forecast in O'Fallon
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
31
+29
+20
31 August, sun
+29
+20
Feels like
+25
748 mmHg
74%
3.3
m/s
SE
31 August, Sunday. day, 29°; night, 20°; rain
1
+28
+20
1 September, mon
+28
+20
Feels like
+24
748 mmHg
74%
3.6
m/s
SE
1 September, Monday. day, 28°; night, 20°; partly cloudy
2
+28
+19
2 September, tue
+28
+19
Feels like
+24
748 mmHg
72%
3.3
m/s
SE
2 September, Tuesday. day, 28°; night, 19°; partly cloudy
3
+29
+19
3 September, wed
+29
+19
Feels like
+24
748 mmHg
71%
3.3
m/s
S
3 September, Wednesday. day, 29°; night, 19°; clear
4
+29
+19
4 September, thu
+29
+19
Feels like
+24
748 mmHg
71%
3.6
m/s
S
4 September, Thursday. day, 29°; night, 19°; clear
5
+28
+18
5 September, fri
+28
+18
Feels like
+23
749 mmHg
71%
3.8
m/s
S
5 September, Friday. day, 28°; night, 18°; clear
6
+28
+19
6 September, sat
+28
+19
Feels like
+23
748 mmHg
70%
3.9
m/s
S
6 September, Saturday. day, 28°; night, 19°; clear
7
+28
+18
7 September, sun
+28
+18
Feels like
+23
748 mmHg
70%
3.9
m/s
S
7 September, Sunday. day, 28°; night, 18°; clear
8
+27
+18
8 September, mon
+27
+18
Feels like
+22
747 mmHg
72%
3.8
m/s
S
8 September, Monday. day, 27°; night, 18°; rain
9
+26
+17
9 September, tue
+26
+17
Feels like
+21
748 mmHg
73%
3.5
m/s
S
9 September, Tuesday. day, 26°; night, 17°; rain
10
+27
+17
10 September, wed
+27
+17
Feels like
+21
749 mmHg
72%
3.2
m/s
SE
10 September, Wednesday. day, 27°; night, 17°; clear
11
+27
+17
11 September, thu
+27
+17
Feels like
+21
749 mmHg
71%
3.6
m/s
S
11 September, Thursday. day, 27°; night, 17°; clear
12
+26
+17
12 September, fri
+26
+17
Feels like
+20
748 mmHg
69%
3.9
m/s
S
12 September, Friday. day, 26°; night, 17°; partly cloudy
13
+26
+16
13 September, sat
+26
+16
Feels like
+20
748 mmHg
69%
3.8
m/s
S
13 September, Saturday. day, 26°; night, 16°; clear
14
+26
+16
14 September, sun
+26
+16
Feels like
+19
748 mmHg
71%
3.8
m/s
S
14 September, Sunday. day, 26°; night, 16°; rain
15
+25
+16
15 September, mon
+25
+16
Feels like
+19
750 mmHg
69%
3.7
m/s
SE
15 September, Monday. day, 25°; night, 16°; overcast
16
+25
+16
16 September, tue
+25
+16
Feels like
+20
749 mmHg
72%
3.5
m/s
SE
16 September, Tuesday. day, 25°; night, 16°; overcast
17
+26
+16
17 September, wed
+26
+16
Feels like
+20
748 mmHg
72%
3.4
m/s
S
17 September, Wednesday. day, 26°; night, 16°; rain
18
+27
+17
18 September, thu
+27
+17
Feels like
+21
748 mmHg
72%
3.5
m/s
SE
18 September, Thursday. day, 27°; night, 17°; clear
19
+27
+17
19 September, fri
+27
+17
Feels like
+21
747 mmHg
70%
4.19
m/s
S
19 September, Friday. day, 27°; night, 17°; overcast
20
+27
+18
20 September, sat
+27
+18
Feels like
+21
747 mmHg
73%
3.9
m/s
S
20 September, Saturday. day, 27°; night, 18°; rain
21
+26
+16
21 September, sun
+26
+16
Feels like
+19
748 mmHg
70%
4.1
m/s
S
21 September, Sunday. day, 26°; night, 16°; clear
22
+25
+15
22 September, mon
+25
+15
Feels like
+18
749 mmHg
69%
4
m/s
S
22 September, Monday. day, 25°; night, 15°; partly cloudy
23
+25
+15
23 September, tue
+25
+15
Feels like
+18
749 mmHg
72%
3.5
m/s
S
23 September, Tuesday. day, 25°; night, 15°; clear
24
+25
+15
24 September, wed
+25
+15
Feels like
+18
748 mmHg
70%
3.9
m/s
S
24 September, Wednesday. day, 25°; night, 15°; overcast
25
+25
+15
25 September, thu
+25
+15
Feels like
+18
748 mmHg
71%
3.7
m/s
S
25 September, Thursday. day, 25°; night, 15°; rain
26
+25
+14
26 September, fri
+25
+14
Feels like
+17
747 mmHg
69%
4.1
m/s
S
26 September, Friday. day, 25°; night, 14°; rain
27
+25
+14
27 September, sat
+25
+14
Feels like
+17
746 mmHg
68%
3.9
m/s
S
27 September, Saturday. day, 25°; night, 14°; clear
28
+24
+14
28 September, sun
+24
+14
Feels like
+16
747 mmHg
68%
4.4
m/s
S
28 September, Sunday. day, 24°; night, 14°; clear
29
+24
+13
29 September, mon
+24
+13
Feels like
+16
749 mmHg
68%
4.19
m/s
S
29 September, Monday. day, 24°; night, 13°; clear
30
+24
+14
30 September, tue
+24
+14
Feels like
+16
749 mmHg
66%
4.1
m/s
S
30 September, Tuesday. day, 24°; night, 14°; clear
1
+24
+13
1 October, wed
+24
+13
Feels like
+16
749 mmHg
67%
4.4
m/s
S
1 October, Wednesday. day, 24°; night, 13°; clear
2
+24
+14
2 October, thu
+24
+14
Feels like
+16
749 mmHg
66%
4.3
m/s
S
2 October, Thursday. day, 24°; night, 14°; clear
3
+23
+14
3 October, fri
+23
+14
Feels like
+16
748 mmHg
69%
4.4
m/s
S
3 October, Friday. day, 23°; night, 14°; rain
4
+23
+14
4 October, sat
+23
+14
Feels like
+15
749 mmHg
70%
4.4
m/s
S
4 October, Saturday. day, 23°; night, 14°; clear
Average data for 10 years
O'Fallon September
15
sunny days
7
days with precipitation
4
cloudy days
15 sunny days; 7 days with precipitation; 4 cloudy days;
71
%
air humidity
2.6
m/s
Wind
S
74
mm of precipitation
(8% of annual average)
air humidity 71%; 74 millimeters of precipitation (8% of annual average); Wind southerly 2.6 Meters per second
Weather graphs for September
Temperature
Precipitation chance, %
Humidity, %
Wind, m/s
Pressure, mmHg
SE
SE
S
S
S
S
S
S
S
SE
S
S
S
S
SE
SE
S
SE
S
S
S
S
S
S
S
S
S
S
S
S
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
Cities near you
Kansas City
St. Louis
Dixon
Ottawa
Iowa City
Washington
Memphis
Paris
Lake Ozark
Cities with similar weather in September
Kemer
Rome
Baku
Madrid
Venice
Beijing
Dushanbe
Thessaloniki
Gudauta
