10 day forecast
Monthly forecast
Weather map
City or area
Find
Sign up
Log in
Go to comparison
Monthly 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
29
+3
+1
29 December, sun
+3
+1
Feels like
−4
754 mmHg
67%
6.8
m/s
W
29 December, Sunday. day, 3°; night, 1°; partly cloudy
30
+8
0
30 December, mon
+8
0
Feels like
+3
754 mmHg
66%
6.4
m/s
SW
30 December, Monday. day, 8°; night, 0°; partly cloudy
31
+8
0
31 December, tue
+8
0
Feels like
+3
754 mmHg
66%
6.4
m/s
SW
31 December, Tuesday. day, 8°; night, 0°; clear
1 January
+1
−2
1 January, wed
+1
−2
Feels like
−5
755 mmHg
63%
7
m/s
W
1 January, Wednesday. day, 1°; night, -2°; clear
2
−1
−4
2 January, thu
−1
−4
Feels like
−6
757 mmHg
73%
5.6
m/s
W
2 January, Thursday. day, -1°; night, -4°; partly cloudy
3
+2
−3
3 January, fri
+2
−3
Feels like
−3
755 mmHg
75%
5
m/s
S
3 January, Friday. day, 2°; night, -3°; clear
4
January
−1
−4
4 January, sat
−1
−4
Feels like
−7
755 mmHg
60%
3.2
m/s
E
Climate normal
+1
−1
4 January, Saturday. day, -1°; night, -4°; overcast
5
−4
−8
5 January, sun
−4
−8
Feels like
−12
745 mmHg
90%
7.2
m/s
NE
Climate normal
+1
−3
5 January, Sunday. day, -4°; night, -8°; snow
6
−6
−12
6 January, mon
−6
−12
Feels like
−14
752 mmHg
73%
6.1
m/s
NW
Climate normal
0
−2
6 January, Monday. day, -6°; night, -12°; snow
7
−5
−12
7 January, tue
−5
−12
Feels like
−15
757 mmHg
71%
3.4
m/s
W
Climate normal
+2
−2
7 January, Tuesday. day, -5°; night, -12°; mostly clear
8
−7
−15
8 January, wed
−7
−15
Feels like
−17
757 mmHg
69%
4.3
m/s
NW
Climate normal
+1
−2
8 January, Wednesday. day, -7°; night, -15°; mostly clear
9
−2
−7
9 January, thu
−2
−7
Feels like
−13
753 mmHg
73%
2.9
m/s
SW
Climate normal
+2
−2
9 January, Thursday. day, -2°; night, -7°; partly cloudy
10
−1
−5
10 January, fri
−1
−5
Feels like
−8
750 mmHg
79%
3
m/s
SW
Climate normal
+3
−1
10 January, Friday. day, -1°; night, -5°; sleet
11
−2
−6
11 January, sat
−2
−6
Feels like
−8
748 mmHg
72%
3.4
m/s
W
Climate normal
+6
+1
11 January, Saturday. day, -2°; night, -6°; clear
12
+1
−3
12 January, sun
+1
−3
Feels like
−7
747 mmHg
78%
2.9
m/s
SW
Climate normal
+2
+2
12 January, Sunday. day, 1°; night, -3°; mostly clear
13
0
−5
13 January, mon
0
−5
Feels like
−8
751 mmHg
75%
3.7
m/s
W
Climate normal
−1
−4
13 January, Monday. day, 0°; night, -5°; mostly clear
14
+1
−4
14 January, tue
+1
−4
Feels like
−8
751 mmHg
74%
4.3
m/s
W
Climate normal
+2
−3
14 January, Tuesday. day, 1°; night, -4°; overcast
15
+1
−4
15 January, wed
+1
−4
Feels like
−6
747 mmHg
79%
4.1
m/s
NW
Climate normal
0
−2
15 January, Wednesday. day, 1°; night, -4°; overcast
16
+2
−10
16 January, thu
+2
−10
Feels like
−11
748 mmHg
82%
5.7
m/s
SW
Climate normal
+4
−2
16 January, Thursday. day, 2°; night, -10°; partly cloudy
17
0
0
17 January, fri
0
0
Feels like
−11
744 mmHg
96%
6.7
m/s
S
Climate normal
+2
+2
17 January, Friday. day, 0°; night, 0°; light snow
18
−3
−5
18 January, sat
−3
−5
Feels like
−10
746 mmHg
96%
5.4
m/s
W
Climate normal
+3
−2
18 January, Saturday. day, -3°; night, -5°; partly cloudy
19
−4
−15
19 January, sun
−4
−15
Feels like
−9
746 mmHg
96%
2.1
m/s
NW
Climate normal
+2
−1
19 January, Sunday. day, -4°; night, -15°; light snow
20
−6
−9
20 January, mon
−6
−9
Feels like
−17
749 mmHg
89%
3.1
m/s
E
Climate normal
+1
−1
20 January, Monday. day, -6°; night, -9°; clear
21
−5
−5
21 January, tue
−5
−5
Feels like
−11
746 mmHg
95%
2.5
m/s
NE
Climate normal
+1
−2
21 January, Tuesday. day, -5°; night, -5°; partly cloudy
22
−5
−9
22 January, wed
−5
−9
Feels like
−12
750 mmHg
95%
4.1
m/s
N
Climate normal
+1
−2
22 January, Wednesday. day, -5°; night, -9°; partly cloudy
23
−4
−5
23 January, thu
−4
−5
Feels like
−14
747 mmHg
93%
4.7
m/s
SW
Climate normal
+2
−1
23 January, Thursday. day, -4°; night, -5°; partly cloudy
24
0
0
24 January, fri
0
0
Feels like
−7
741 mmHg
98%
6
m/s
W
Climate normal
+1
−2
24 January, Friday. day, 0°; night, 0°; partly cloudy
25
0
0
25 January, sat
0
0
Feels like
−7
743 mmHg
100%
7
m/s
W
Climate normal
+2
−1
25 January, Saturday. day, 0°; night, 0°; overcast
26
+1
+1
26 January, sun
+1
+1
Feels like
−3
745 mmHg
100%
3.8
m/s
S
Climate normal
+2
−2
26 January, Sunday. day, 1°; night, 1°; partly cloudy
27
+9
+11
27 January, mon
+9
+11
Feels like
−2
742 mmHg
98%
10.2
m/s
S
Climate normal
+2
−2
27 January, Monday. day, 9°; night, 11°; partly cloudy
28
+13
+13
28 January, tue
+13
+13
Feels like
+6
741 mmHg
91%
10.1
m/s
S
Climate normal
+4
0
28 January, Tuesday. day, 13°; night, 13°; light rain
29
+15
+15
29 January, wed
+15
+15
Feels like
+7
733 mmHg
93%
10.7
m/s
S
Climate normal
+6
+3
29 January, Wednesday. day, 15°; night, 15°; rain
30
+16
+13
30 January, thu
+16
+13
Feels like
+13
725 mmHg
94%
6.9
m/s
S
Climate normal
+6
0
30 January, Thursday. day, 16°; night, 13°; rain
31
+5
−3
31 January, fri
+5
−3
Feels like
−8
741 mmHg
77%
9.1
m/s
NW
Climate normal
+5
+2
31 January, Friday. day, 5°; night, -3°; light rain
1 February
+2
−2
1 February, sat
+2
−2
Feels like
−8
754 mmHg
50%
5.7
m/s
NE
Climate normal
+3
+1
1 February, Saturday. day, 2°; night, -2°; clear
Average for 30 days
8
sunny days
9
days with precipitation
13
cloudy days
8 sunny days; 9 days with precipitation; 13 cloudy days;
83
%
air humidity
5.2
m/s
Wind
W
23
mm of precipitation
(3% of annual average)
air humidity 83%; 23 millimeters of precipitation (3% of annual average); Wind westerly 5.2 Meters per second
Forecast in graphs
Temperature
Humidity, %
Wind, m/s
Pressure, mmHg
E
NE
NW
W
NW
SW
SW
W
SW
W
W
NW
SW
S
W
NW
E
NE
N
SW
W
W
S
S
S
S
S
NW
NE
S
4
Average data for 10 years
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
31
1
February
2
Daytime temperature
Night-time temperature
