O Fallon, US-Missouri – Hourly Weather Forecast
O Fallon – Sunday, May 10
12 AM
20°
68°
cloudy
Precip0 mm
Pressure1012 hPa
1 AM
18°
64°
cloudy
Precip0 mm
Pressure1013 hPa
2 AM
15°
59°
partly cloudy
Precip0 mm
Pressure1013 hPa
3 AM
15°
59°
partly cloudy
Precip0 mm
Pressure1014 hPa
4 AM
14°
57°
mostly clear
Precip0 mm
Pressure1015 hPa
5 AM
13°
55°
fair
Precip0 mm
Pressure1016 hPa
6 AM
12°
54°
fair
Precip0 mm
Pressure1017 hPa
7 AM
12°
54°
fair
Precip0 mm
Pressure1018 hPa
8 AM
13°
55°
fair
Precip0 mm
Pressure1019 hPa
9 AM
15°
59°
fair
Precip0 mm
Pressure1020 hPa
10 AM
16°
61°
fair
Precip0 mm
Pressure1020 hPa
11 AM
18°
64°
mostly clear
Precip0 mm
Pressure1020 hPa
12 PM
19°
66°
partly cloudy
Precip0 mm
Pressure1021 hPa
1 PM
19°
66°
cloudy
Precip0 mm
Pressure1020 hPa
2 PM
19°
66°
cloudy
Precip0 mm
Pressure1020 hPa
3 PM
18°
64°
cloudy
Precip0 mm
Pressure1021 hPa
4 PM
18°
64°
cloudy
Precip0 mm
Pressure1021 hPa
5 PM
18°
64°
cloudy
Precip0 mm
Pressure1020 hPa
6 PM
18°
64°
cloudy
Precip0 mm
Pressure1020 hPa
7 PM
17°
63°
cloudy
Precip0 mm
Pressure1020 hPa
8 PM
15°
59°
partly cloudy
Precip0 mm
Pressure1021 hPa
9 PM
13°
55°
mostly clear
Precip0 mm
Pressure1022 hPa
10 PM
12°
54°
fair
Precip0 mm
Pressure1023 hPa
11 PM
12°
54°
fair
Precip0 mm
Pressure1023 hPa
O Fallon – Monday, May 11
12 AM
12°
54°
fair
Precip0 mm
Pressure1023 hPa
1 AM
11°
52°
fair
Precip0 mm
Pressure1022 hPa
2 AM
11°
52°
fair
Precip0 mm
Pressure1022 hPa
3 AM
10°
50°
fair
Precip0 mm
Pressure1022 hPa
4 AM
10°
50°
fair
Precip0 mm
Pressure1022 hPa
5 AM
10°
50°
fair
Precip0 mm
Pressure1022 hPa
6 AM
9°
48°
fair
Precip0 mm
Pressure1023 hPa
7 AM
11°
52°
fair
Precip0 mm
Pressure1023 hPa
8 AM
13°
55°
fair
Precip0 mm
Pressure1024 hPa
9 AM
16°
61°
fair
Precip0 mm
Pressure1024 hPa
10 AM
18°
64°
fair
Precip0 mm
Pressure1024 hPa
11 AM
20°
68°
fair
Precip0 mm
Pressure1024 hPa
12 PM
21°
70°
fair
Precip0 mm
Pressure1024 hPa
1 PM
22°
72°
mostly clear
Precip0 mm
Pressure1023 hPa
2 PM
23°
73°
fair
Precip0 mm
Pressure1022 hPa
3 PM
23°
73°
mostly clear
Precip0 mm
Pressure1022 hPa
4 PM
24°
75°
partly cloudy
Precip0 mm
Pressure1021 hPa
5 PM
22°
72°
mostly clear
Precip0 mm
Pressure1020 hPa
6 PM
21°
70°
mostly clear
Precip0 mm
Pressure1020 hPa
7 PM
21°
70°
fair
Precip0 mm
Pressure1020 hPa
8 PM
18°
64°
fair
Precip0 mm
Pressure1020 hPa
9 PM
17°
63°
fair
Precip0 mm
Pressure1020 hPa
10 PM
15°
59°
fair
Precip0 mm
Pressure1021 hPa
11 PM
14°
57°
fair
Precip0 mm
Pressure1021 hPa
O Fallon – Tuesday, May 12
12 AM
14°
57°
partly cloudy
Precip0 mm
Pressure1021 hPa
1 AM
13°
55°
fair
Precip0 mm
Pressure1021 hPa
2 AM
12°
54°
fair
Precip0 mm
Pressure1020 hPa
3 AM
12°
54°
fair
Precip0 mm
Pressure1020 hPa
4 AM
12°
54°
fair
Precip0 mm
Pressure1020 hPa
5 AM
12°
54°
fair
Precip0 mm
Pressure1020 hPa
6 AM
12°
54°
fair
Precip0 mm
Pressure1020 hPa
7 AM
14°
57°
fair
Precip0 mm
Pressure1020 hPa
8 AM
16°
61°
fair
Precip0 mm
Pressure1020 hPa
9 AM
18°
64°
mostly clear
Precip0 mm
Pressure1019 hPa
10 AM
21°
70°
fair
Precip0 mm
Pressure1019 hPa
11 AM
23°
73°
fair
Precip0 mm
Pressure1019 hPa
12 PM
25°
77°
fair
Precip0 mm
Pressure1018 hPa
1 PM
26°
79°
fair
Precip0 mm
Pressure1017 hPa
2 PM
26°
79°
fair
Precip0 mm
Pressure1016 hPa
3 PM
27°
81°
fair
Precip0 mm
Pressure1015 hPa
4 PM
27°
81°
mostly clear
Precip0 mm
Pressure1014 hPa
5 PM
27°
81°
mostly clear
Precip0 mm
Pressure1013 hPa
6 PM
26°
79°
cloudy
Precip0 mm
Pressure1013 hPa
Hourly Temperature Trend
Data source: MET Norway — Last updated: May 10, 2026, 08:17 UTC