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May 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
28
+20
+13
28 April, sun
+20
+13
Feels like
+18
746 mmHg
70%
7.3
m/s
S
28 April, Sunday. day, 20°; night, 13°; partly cloudy
29
+20
+14
29 April, mon
+20
+14
Feels like
+18
746 mmHg
73%
5.8
m/s
S
29 April, Monday. day, 20°; night, 14°; rain
30
+19
+14
30 April, tue
+19
+14
Feels like
+18
747 mmHg
73%
4.9
m/s
S
30 April, Tuesday. day, 19°; night, 14°; clear
1
+19
+13
1 May, wed
+19
+13
Feels like
+18
748 mmHg
68%
4.8
m/s
SW
1 May, Wednesday. day, 19°; night, 13°; overcast
2
+18
+14
2 May, thu
+18
+14
Feels like
+16
748 mmHg
68%
5.8
m/s
SW
2 May, Thursday. day, 18°; night, 14°; rain
3
+20
+13
3 May, fri
+20
+13
Feels like
+18
749 mmHg
64%
4.9
m/s
SW
3 May, Friday. day, 20°; night, 13°; rain
4
+22
+14
4 May, sat
+22
+14
Feels like
+22
748 mmHg
62%
5.9
m/s
W
4 May, Saturday. day, 22°; night, 14°; clear
5
+23
+16
5 May, sun
+23
+16
Feels like
+23
748 mmHg
61%
4.9
m/s
S
5 May, Sunday. day, 23°; night, 16°; clear
6
+26
+18
6 May, mon
+26
+18
Feels like
+26
747 mmHg
61%
4.6
m/s
S
6 May, Monday. day, 26°; night, 18°; partly cloudy
7
+23
+19
7 May, tue
+23
+19
Feels like
+24
747 mmHg
70%
5
m/s
SW
7 May, Tuesday. day, 23°; night, 19°; rain
8
+22
+17
8 May, wed
+22
+17
Feels like
+22
748 mmHg
68%
5
m/s
SW
8 May, Wednesday. day, 22°; night, 17°; partly cloudy
9
+21
+17
9 May, thu
+21
+17
Feels like
+20
748 mmHg
75%
4.5
m/s
S
9 May, Thursday. day, 21°; night, 17°; rain
10
+23
+16
10 May, fri
+23
+16
Feels like
+23
748 mmHg
69%
5.5
m/s
S
10 May, Friday. day, 23°; night, 16°; clear
11
+22
+16
11 May, sat
+22
+16
Feels like
+21
749 mmHg
64%
6.3
m/s
SW
11 May, Saturday. day, 22°; night, 16°; clear
12
+22
+17
12 May, sun
+22
+17
Feels like
+21
750 mmHg
66%
4.6
m/s
S
12 May, Sunday. day, 22°; night, 17°; clear
13
+21
+15
13 May, mon
+21
+15
Feels like
+20
750 mmHg
67%
5.5
m/s
SW
13 May, Monday. day, 21°; night, 15°; clear
14
+21
+14
14 May, tue
+21
+14
Feels like
+20
749 mmHg
68%
5
m/s
W
14 May, Tuesday. day, 21°; night, 14°; rain
15
+19
+16
15 May, wed
+19
+16
Feels like
+18
750 mmHg
68%
4.8
m/s
W
15 May, Wednesday. day, 19°; night, 16°; rain
16
+19
+14
16 May, thu
+19
+14
Feels like
+18
750 mmHg
68%
4.5
m/s
SE
16 May, Thursday. day, 19°; night, 14°; partly cloudy
17
+22
+15
17 May, fri
+22
+15
Feels like
+22
750 mmHg
66%
4.1
m/s
S
17 May, Friday. day, 22°; night, 15°; clear
18
+23
+16
18 May, sat
+23
+16
Feels like
+22
750 mmHg
63%
5
m/s
SE
18 May, Saturday. day, 23°; night, 16°; partly cloudy
19
+23
+17
19 May, sun
+23
+17
Feels like
+23
748 mmHg
67%
4.8
m/s
SE
19 May, Sunday. day, 23°; night, 17°; clear
20
+23
+17
20 May, mon
+23
+17
Feels like
+24
748 mmHg
68%
4.6
m/s
SW
20 May, Monday. day, 23°; night, 17°; rain
21
+24
+17
21 May, tue
+24
+17
Feels like
+24
749 mmHg
60%
4.3
m/s
SW
21 May, Tuesday. day, 24°; night, 17°; clear
22
+23
+18
22 May, wed
+23
+18
Feels like
+23
749 mmHg
62%
4.4
m/s
S
22 May, Wednesday. day, 23°; night, 18°; partly cloudy
23
+24
+18
23 May, thu
+24
+18
Feels like
+25
748 mmHg
66%
4.4
m/s
SE
23 May, Thursday. day, 24°; night, 18°; rain
24
+25
+18
24 May, fri
+25
+18
Feels like
+25
747 mmHg
68%
4.9
m/s
SE
24 May, Friday. day, 25°; night, 18°; clear
25
+26
+19
25 May, sat
+26
+19
Feels like
+27
747 mmHg
75%
5
m/s
S
25 May, Saturday. day, 26°; night, 19°; rain
26
+26
+20
26 May, sun
+26
+20
Feels like
+28
747 mmHg
74%
4.5
m/s
S
26 May, Sunday. day, 26°; night, 20°; rain
27
+25
+20
27 May, mon
+25
+20
Feels like
+26
747 mmHg
70%
5
m/s
S
27 May, Monday. day, 25°; night, 20°; rain
28
+28
+20
28 May, tue
+28
+20
Feels like
+29
748 mmHg
62%
4.8
m/s
S
28 May, Tuesday. day, 28°; night, 20°; clear
29
+27
+21
29 May, wed
+27
+21
Feels like
+28
749 mmHg
63%
4.6
m/s
S
29 May, Wednesday. day, 27°; night, 21°; clear
30
+26
+21
30 May, thu
+26
+21
Feels like
+27
749 mmHg
63%
5
m/s
S
30 May, Thursday. day, 26°; night, 21°; rain
31
+26
+20
31 May, fri
+26
+20
Feels like
+27
749 mmHg
62%
4.8
m/s
SW
31 May, Friday. day, 26°; night, 20°; rain
1
+26
+20
1 June, sat
+26
+20
Feels like
+27
749 mmHg
64%
4.4
m/s
SW
1 June, Saturday. day, 26°; night, 20°; rain
Average data for 10 years
O'Fallon May
12
sunny days
13
days with precipitation
6
cloudy days
12 sunny days; 13 days with precipitation; 6 cloudy days;
67
%
air humidity
3.5
m/s
Wind
S
92
mm of precipitation
(11% of annual average)
air humidity 67%; 92 millimeters of precipitation (11% of annual average); Wind southerly 3.5 Meters per second
Weather graphs for May
Temperature
Precipitation chance, %
Humidity, %
Wind, m/s
Pressure, mmHg
SW
SW
SW
W
S
S
SW
SW
S
S
SW
S
SW
W
W
SE
S
SE
SE
SW
SW
S
SE
SE
S
S
S
S
S
S
SW
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
31
Daytime temperature
Night-time temperature
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