O Fallon, US-Missouri – Hourly Weather Forecast
O Fallon – Thursday, October 15
12 AM
20°
68°
fog
Precip0 mm
Pressure1017 hPa
1 AM
21°
70°
fog
Precip0 mm
Pressure1017 hPa
2 AM
20°
68°
rain
Precip0.4 mm
Pressure1017 hPa
3 AM
20°
68°
rain
Precip0.9 mm
Pressure1017 hPa
4 AM
20°
68°
heavy rain
Precip2.4 mm
Pressure1016 hPa
5 AM
20°
68°
rain
Precip0.7 mm
Pressure1016 hPa
6 AM
21°
70°
rain
Precip0.6 mm
Pressure1016 hPa
7 AM
21°
70°
heavy rain
Precip1.5 mm
Pressure1016 hPa
8 AM
21°
70°
heavy rain
Precip1.1 mm
Pressure1016 hPa
9 AM
21°
70°
light rain
Precip0.2 mm
Pressure1016 hPa
10 AM
23°
73°
heavy rain
Precip1.8 mm
Pressure1015 hPa
11 AM
23°
73°
rain
Precip0.4 mm
Pressure1015 hPa
12 PM
24°
75°
cloudy
Precip0 mm
Pressure1015 hPa
1 PM
25°
77°
cloudy
Precip0 mm
Pressure1014 hPa
2 PM
26°
79°
cloudy
Precip0 mm
Pressure1013 hPa
3 PM
28°
82°
cloudy
Precip0 mm
Pressure1012 hPa
4 PM
26°
79°
partly cloudy
Precip0 mm
Pressure1012 hPa
5 PM
26°
79°
mostly clear
Precip0 mm
Pressure1011 hPa
6 PM
25°
77°
mostly clear
Precip0 mm
Pressure1012 hPa
7 PM
24°
75°
partly cloudy
Precip0 mm
Pressure1012 hPa
8 PM
23°
73°
rain showers
Precip0.5 mm
Pressure1013 hPa
9 PM
21°
70°
rain
Precip0.6 mm
Pressure1013 hPa
10 PM
19°
66°
light rain
Precip0.1 mm
Pressure1015 hPa
11 PM
17°
63°
cloudy
Precip0 mm
Pressure1016 hPa
O Fallon – Friday, October 16
12 AM
16°
61°
cloudy
Precip0 mm
Pressure1018 hPa
1 AM
15°
59°
mostly clear
Precip0 mm
Pressure1019 hPa
2 AM
14°
57°
cloudy
Precip0 mm
Pressure1019 hPa
3 AM
14°
57°
mostly clear
Precip0 mm
Pressure1020 hPa
4 AM
13°
55°
partly cloudy
Precip0 mm
Pressure1020 hPa
5 AM
13°
55°
cloudy
Precip0 mm
Pressure1020 hPa
6 AM
13°
55°
partly cloudy
Precip0 mm
Pressure1021 hPa
7 AM
12°
54°
partly cloudy
Precip0 mm
Pressure1022 hPa
8 AM
11°
52°
fair
Precip0 mm
Pressure1023 hPa
9 AM
12°
54°
mostly clear
Precip0 mm
Pressure1024 hPa
10 AM
13°
55°
mostly clear
Precip0 mm
Pressure1024 hPa
11 AM
13°
55°
cloudy
Precip0 mm
Pressure1024 hPa
12 PM
13°
55°
cloudy
Precip0 mm
Pressure1024 hPa
1 PM
13°
55°
cloudy
Precip0 mm
Pressure1024 hPa
2 PM
13°
55°
light rain showers
Precip0.2 mm
Pressure1024 hPa
3 PM
14°
57°
light rain showers
Precip0.1 mm
Pressure1024 hPa
4 PM
13°
55°
partly cloudy
Precip0 mm
Pressure1025 hPa
5 PM
12°
54°
partly cloudy
Precip0 mm
Pressure1026 hPa
6 PM
12°
54°
cloudy
Precip0 mm
Pressure1027 hPa
7 PM
12°
54°
cloudy
Precip0 mm
Pressure1029 hPa
8 PM
12°
54°
cloudy
Precip0 mm
Pressure1029 hPa
9 PM
12°
54°
cloudy
Precip0 mm
Pressure1030 hPa
10 PM
12°
54°
cloudy
Precip0 mm
Pressure1031 hPa
11 PM
11°
52°
mostly clear
Precip0 mm
Pressure1031 hPa
O Fallon – Saturday, October 17
12 AM
10°
50°
fair
Precip0 mm
Pressure1032 hPa
1 AM
9°
48°
fair
Precip0 mm
Pressure1032 hPa
2 AM
9°
48°
fair
Precip0 mm
Pressure1033 hPa
3 AM
8°
46°
fair
Precip0 mm
Pressure1033 hPa
4 AM
7°
45°
fair
Precip0 mm
Pressure1033 hPa
5 AM
7°
45°
fair
Precip0 mm
Pressure1034 hPa
6 AM
6°
43°
fair
Precip0 mm
Pressure1034 hPa
7 AM
6°
43°
fair
Precip0 mm
Pressure1035 hPa
8 AM
7°
45°
fair
Precip0 mm
Pressure1036 hPa
9 AM
8°
46°
fair
Precip0 mm
Pressure1036 hPa
10 AM
10°
50°
fair
Precip0 mm
Pressure1036 hPa
11 AM
11°
52°
fair
Precip0 mm
Pressure1036 hPa
12 PM
12°
54°
fair
Precip0 mm
Pressure1036 hPa
1 PM
13°
55°
fair
Precip0 mm
Pressure1035 hPa
2 PM
14°
57°
fair
Precip0 mm
Pressure1034 hPa
3 PM
14°
57°
fair
Precip0 mm
Pressure1033 hPa
4 PM
14°
57°
fair
Precip0 mm
Pressure1033 hPa
5 PM
14°
57°
fair
Precip0 mm
Pressure1032 hPa
6 PM
13°
55°
fair
Precip0 mm
Pressure1032 hPa
7 PM
11°
52°
fair
Precip0 mm
Pressure1032 hPa
8 PM
10°
50°
fair
Precip0 mm
Pressure1032 hPa
9 PM
10°
50°
fair
Precip0 mm
Pressure1032 hPa
10 PM
9°
48°
fair
Precip0 mm
Pressure1033 hPa
11 PM
9°
48°
fair
Precip0 mm
Pressure1033 hPa
Hourly Temperature Trend
Data source: MET Norway — Last updated: Oct 15, 2026, 23:19 UTC