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Hour-by-Hour Forecast for O'Fallon, Missouri, USA

Currently: 85 °F. Passing clouds. (Weather station: Lambert-St. Louis International Airport, USA). See more current weather

Hour-by-hour Forecast in O'Fallon — Graph

°F
Time
Wind
(mph)
Rain/Snow
()
Temp
(°F)
72
75
78
81
84
87
90
93
96
99
Tuesday, July 22, 2025
10 pm
81
6
11 pm
80
6
Wednesday, July 23, 2025
12 am
80
6
1 am
79
6
2 am
78
6
3 am
78
6
4 am
77
6
5 am
77
5
6 am
76
5
7 am
77
4
8 am
79
5
9 am
83
5
10 am
86
5
11 am
88
5
12 pm
91
6
1 pm
93
6
2 pm
94
5
3 pm
95
4
4 pm
95
4
5 pm
94
5
6 pm
93
6
7 pm
91
8
8 pm
89
8
9 pm
87
8
10 pm
85
9
11 pm
84
8
Thursday, July 24, 2025
12 am
82
8
1 am
81
7
2 am
80
7
3 am
80
6
4 am
79
5
5 am
78
5
6 am
77
5
7 am
78
6
8 am
81
6
9 am
85
7
10 am
88
8
11 am
91
8
12 pm
93
8
1 pm
95
8
2 pm
96
7
3 pm
96
5
4 pm
96
4
5 pm
95
5
6 pm
93
6
7 pm
91
8
8 pm
89
9
9 pm
86
10
10 pm
84
11
11 pm
83
10
Friday, July 25, 2025
12 am
82
9
1 am
81
10
2 am
81
8
3 am
80
7
4 am
80
6
5 am
79
5
6 am
78
4
7 am
78
3
8 am
80
3
9 am
82
3
10 am
83
5
11 am
85
3
12 pm
88
2
1 pm
90
3
2 pm
90
4
3 pm
91
6
4 pm
91
8
5 pm
90
9
6 pm
89
10
7 pm
87
11
8 pm
85
8
9 pm
84
10
10 pm
82
14
11 pm
80
10
Saturday, July 26, 2025
12 am
79
7
1 am
80
6
2 am
80
5
3 am
78
5
4 am
78
5
5 am
78
8
6 am
77
10
7 am
78
12
8 am
81
11
9 am
84
11
10 am
87
10
11 am
89
10
12 pm
91
9
1 pm
92
9
2 pm
94
8
3 pm
95
8
4 pm
96
9
5 pm
95
9
6 pm
93
9
7 pm
91
9
0.01
8 pm
88
10
0.02
9 pm
84
10
0.04
10 pm
80
11
0.04
11 pm
80
10
Sunday, July 27, 2025
0.04
12 am
79
10
0.04
1 am
78
10
0.03
2 am
78
9
3 am
78
7
4 am
77
6
5 am
77
6
6 am
77
5
7 am
77
5
8 am
80
6
9 am
83
7
10 am
87
8
11 am
90
7
12 pm
92
7
1 pm
94
7
2 pm
96
7
3 pm
97
6
4 pm
98
6
5 pm
98
5
6 pm
98
4
7 pm
94
5
8 pm
90
1
0.08
9 pm
84
3
0.09
10 pm
75
7
0.08
11 pm
77
5
Monday, July 28, 2025
0.06
12 am
78
5
0.05
1 am
78
6
0.03
2 am
76
6
0.01
3 am
76
6
4 am
75
6
5 am
75
5
6 am
74
4
7 am
74
4
8 am
79
5
9 am
83
6
10 am
87
7
11 am
89
7
12 pm
91
7
1 pm
94
8
2 pm
95
7
3 pm
96
7
4 pm
95
6
5 pm
95
4
6 pm
94
3
7 pm
92
3
8 pm
91
2
9 pm
89
2
10 pm
86
3
11 pm
85
4
Tuesday, July 29, 2025
12 am
84
4
1 am
82
4
2 am
82
5
3 am
81
5
4 am
81
5
5 am
80
4
6 am
79
4
7 am
80
5
8 am
84
5
9 am
88
5
10 am
90
5
11 am
93
5
12 pm
95
5
Tue, Jul 22 at 10:00 pm
81 °F
Cloudy.
Feels Like: 87 °F
Humidity: 84%
Precipitation: Rain: 0 Snow: 0
Precipitation Chance: 4%
SE
Wind: 6 mph

Detailed Hourly Forecast — Next 24 hours

Scroll right to see more
 ConditionsComfortPrecipitation
Time TempWeatherFeels LikeWind HumidityChanceAmount
10:00 pm
Tue, Jul 22
81 °FCloudy.87 °F6 mph84%4%0.00" (snow)
0.00" (rain)
11:00 pm80 °FOvercast.85 °F6 mph87%3%0.00" (snow)
0.00" (rain)
12:00 am
Wed, Jul 23
80 °FOvercast.85 °F6 mph86%3%0.00" (snow)
0.00" (rain)
1:00 am79 °FOvercast.83 °F6 mph87%2%0.00" (snow)
0.00" (rain)
2:00 am78 °FMostly cloudy.81 °F6 mph88%2%0.00" (snow)
0.00" (rain)
3:00 am78 °FBroken clouds.80 °F6 mph88%2%0.00" (snow)
0.00" (rain)
4:00 am77 °FOvercast.79 °F6 mph89%1%0.00" (snow)
0.00" (rain)
5:00 am77 °FBroken clouds.77 °F5 mph90%1%0.00" (snow)
0.00" (rain)
6:00 am76 °FScattered clouds.76 °F5 mph91%1%0.00" (snow)
0.00" (rain)
7:00 am77 °FScattered clouds.78 °F4 mph90%1%0.00" (snow)
0.00" (rain)
8:00 am79 °FScattered clouds.83 °F5 mph84%1%0.00" (snow)
0.00" (rain)
9:00 am83 °FScattered clouds.90 °F5 mph78%0%0.00" (snow)
0.00" (rain)
10:00 am86 °FPartly cloudy.95 °F5 mph72%0%0.00" (snow)
0.00" (rain)
11:00 am88 °FScattered clouds.99 °F5 mph67%0%0.00" (snow)
0.00" (rain)
12:00 pm91 °FMostly sunny.103 °F6 mph62%0%0.00" (snow)
0.00" (rain)
1:00 pm93 °FMostly sunny.106 °F6 mph58%0%0.00" (snow)
0.00" (rain)
2:00 pm94 °FMostly sunny.107 °F5 mph55%0%0.00" (snow)
0.00" (rain)
3:00 pm95 °FMostly sunny.107 °F4 mph53%0%0.00" (snow)
0.00" (rain)
4:00 pm95 °FMostly sunny.106 °F4 mph52%0%0.00" (snow)
0.00" (rain)
5:00 pm94 °FMostly sunny.106 °F5 mph53%0%0.00" (snow)
0.00" (rain)
6:00 pm93 °FSunny.105 °F6 mph56%0%0.00" (snow)
0.00" (rain)
7:00 pm91 °FSunny.103 °F8 mph61%0%0.00" (snow)
0.00" (rain)
8:00 pm89 °FSunny.100 °F8 mph64%0%0.00" (snow)
0.00" (rain)
9:00 pm87 °FClear.98 °F8 mph69%0%0.00" (snow)
0.00" (rain)
* Updated Tuesday, July 22, 2025 2:42:25 pm O'Fallon time - Weather by CustomWeather, © 2025

14 days extended forecast