Currently: 82 °F. Clear. (Weather station: Lambert-St. Louis International Airport, USA). See more current weatherCity of O'Fallon Extended Forecast with high and low temperatures
°F
Time
Wind
(mph)
(mph)
Rain/Snow
()
()
Temp
(°F)
(°F)
70
73
76
79
82
85
88
91
94
97
100
Jun 22 – Jun 28
0.03
Lo:77
Mon, 23
Hi:98
6
0.02
Lo:78
Tue, 24
Hi:95
4
0.15
Lo:74
Wed, 25
Hi:95
3
0.02
Lo:74
Thu, 26
Hi:95
4
0.05
Lo:77
Fri, 27
Hi:96
7
Lo:74
Sat, 28
Hi:100
6
Jun 29 – Jul 5
0.11
Lo:71
Sun, 29
Hi:96
4
0.1
Lo:76
Mon, 30
Hi:92
4
0.19
Lo:77
Tue, 1
Hi:92
7
0.36
Lo:77
Wed, 2
Hi:90
6
Lo:77
Thu, 3
Hi:92
5
Lo:77
Fri, 4
Hi:91
6
Lo:77
Sat, 5
Hi:93
9
Jul 6 – Jul 12
Lo:79
Sun, 6
Hi:97
9
Lo:82
Mon, 7
Hi:101
10
2 Week Extended Forecast in City of O'Fallon, Missouri, USA
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| Conditions | Comfort | Precipitation | Sun | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Day | Temperature | Weather | Feels Like | Wind | Humidity | Chance | Amount | UV | Sunrise | Sunset | ||
| Mon Jun 23 |  | 98 / 77 °F | Isolated tstorms late. Increasing cloudiness. | 102 °F | 6 mph | ↑ | 39% | 52% | 0.03" | 10 (Very high) | 5:38 am | 8:31 pm |
| Tue Jun 24 | | 95 / 78 °F | Isolated tstorms late. Mostly cloudy. | 100 °F | 4 mph | ↑ | 45% | 40% | 0.02" | 5 (Moderate) | 5:39 am | 8:31 pm |
| Wed Jun 25 | | 95 / 74 °F | Isolated tstorms late. Cloudy. | 98 °F | 3 mph | ↑ | 47% | 48% | 0.15" | 5 (Moderate) | 5:39 am | 8:31 pm |
| Thu Jun 26 | | 95 / 74 °F | Isolated tstorms late. Broken clouds. | 100 °F | 4 mph | ↑ | 46% | 17% | 0.02" | 7 (High) | 5:39 am | 8:31 pm |
| Fri Jun 27 | | 96 / 77 °F | Isolated tstorms late. Mostly sunny. | 98 °F | 7 mph | ↑ | 47% | 22% | 0.05" | 10 (Very high) | 5:40 am | 8:31 pm |
| Sat Jun 28 |  | 100 / 74 °F | Afternoon clouds. | 103 °F | 6 mph | ↑ | 33% | 2% | 0.00" | 7 (High) | 5:40 am | 8:31 pm |
| Sun Jun 29 |  | 96 / 71 °F | Tstorms early. Broken clouds. | 101 °F | 4 mph | ↑ | 44% | 42% | 0.11" | 7 (High) | 5:40 am | 8:31 pm |
| Mon Jun 30 | | 92 / 76 °F | Tstorms early. Partly cloudy. | 96 °F | 4 mph | ↑ | 44% | 80% | 0.10" | 3 (Moderate) | 5:41 am | 8:31 pm |
| Tue Jul 1 | | 92 / 77 °F | A few tstorms. Increasing cloudiness. | 98 °F | 7 mph | ↑ | 49% | 87% | 0.19" | 3 (Moderate) | 5:41 am | 8:31 pm |
| Wed Jul 2 | | 90 / 77 °F | Thundershowers. Overcast. | 122 °F | 6 mph | ↑ | 89% | 73% | 0.36" | 5 (Moderate) | 5:42 am | 8:31 pm |
| Thu Jul 3 | | 92 / 77 °F | Morning clouds. | 103 °F | 5 mph | ↑ | 59% | 39% | 0.00" | 7 (High) | 5:42 am | 8:31 pm |
| Fri Jul 4 | | 91 / 77 °F | Morning clouds. | 96 °F | 6 mph | ↑ | 49% | 5% | 0.00" | 7 (High) | 5:43 am | 8:31 pm |
| Sat Jul 5 |  | 93 / 77 °F | Sunny. | 100 °F | 9 mph | ↑ | 50% | 3% | 0.00" | 7 (High) | 5:43 am | 8:31 pm |
| Sun Jul 6 | | 97 / 79 °F | Sunny. | 103 °F | 9 mph | ↑ | 40% | 4% | 0.00" | 7 (High) | 5:44 am | 8:30 pm |
| Mon Jul 7 | | 101 / 82 °F | Sunny. | 121 °F | 10 mph | ↑ | 51% | 5% | 0.00" | 7 (High) | 5:45 am | 8:30 pm |
| * Updated Sunday, June 22, 2025 10:24:11 pm City of O'Fallon time - Weather by CustomWeather, © 2025 | ||||||||||||