Currently: 82 °F. Passing clouds. (Weather station: Lambert-St. Louis International Airport, USA). See more current weatherO'Fallon Extended Forecast with high and low temperatures
°F
Time
Wind
(mph)
(mph)
Rain/Snow
()
()
Temp
(°F)
(°F)
72
75
78
81
84
87
90
93
96
99
Jun 22 – Jun 28
0.08
Lo:78
Tue, 24
Hi:95
4
0.03
Lo:77
Wed, 25
Hi:94
4
0.05
Lo:76
Thu, 26
Hi:94
5
0.07
Lo:76
Fri, 27
Hi:97
8
0.11
Lo:77
Sat, 28
Hi:91
5
Jun 29 – Jul 5
Lo:74
Sun, 29
Hi:98
3
0.01
Lo:73
Mon, 30
Hi:97
3
0.33
Lo:76
Tue, 1
Hi:90
4
1.67
Lo:76
Wed, 2
Hi:89
6
0.24
Lo:75
Thu, 3
Hi:89
7
0.13
Lo:75
Fri, 4
Hi:90
10
Lo:75
Sat, 5
Hi:94
2
Jul 6 – Jul 12
0.08
Lo:76
Sun, 6
Hi:96
8
0.14
Lo:76
Mon, 7
Hi:94
9
Lo:74
Tue, 8
Hi:90
9
2 Week Extended Forecast in O'Fallon, Missouri, USA
Scroll right to see more
| Conditions | Comfort | Precipitation | Sun | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Day | Temperature | Weather | Feels Like | Wind | Humidity | Chance | Amount | UV | Sunrise | Sunset | ||
| Tue Jun 24 |  | 95 / 78 °F | Thundershowers. Overcast. | 100 °F | 4 mph | ↑ | 44% | 50% | 0.08" | 5 (Moderate) | 5:37 am | 8:29 pm |
| Wed Jun 25 | | 94 / 77 °F | Thundershowers. Mostly cloudy. | 100 °F | 4 mph | ↑ | 48% | 39% | 0.03" | 5 (Moderate) | 5:37 am | 8:29 pm |
| Thu Jun 26 |  | 94 / 76 °F | Isolated tstorms late. Mostly cloudy. | 99 °F | 5 mph | ↑ | 46% | 51% | 0.05" | 5 (Moderate) | 5:38 am | 8:29 pm |
| Fri Jun 27 |  | 97 / 76 °F | Showers late. Broken clouds. | 101 °F | 8 mph | ↑ | 40% | 48% | 0.07" | 7 (High) | 5:38 am | 8:29 pm |
| Sat Jun 28 | | 91 / 77 °F | Thundershowers. Cloudy. | 96 °F | 5 mph | ↑ | 51% | 22% | 0.11" | 7 (High) | 5:38 am | 8:29 pm |
| Sun Jun 29 |  | 98 / 74 °F | Partly cloudy. | 100 °F | 3 mph | ↑ | 44% | 3% | 0.00" | 7 (High) | 5:39 am | 8:29 pm |
| Mon Jun 30 | | 97 / 73 °F | Showers late. Afternoon clouds. | 99 °F | 3 mph | ↑ | 42% | 16% | 0.01" | 5 (Moderate) | 5:39 am | 8:29 pm |
| Tue Jul 1 | | 90 / 76 °F | Thunderstorms. Cloudy. | 94 °F | 4 mph | ↑ | 49% | 99% | 0.33" | 5 (Moderate) | 5:40 am | 8:29 pm |
| Wed Jul 2 |  | 89 / 76 °F | Tons of rain. Mostly cloudy. | 96 °F | 6 mph | ↑ | 56% | 99% | 1.67" | 7 (High) | 5:40 am | 8:29 pm |
| Thu Jul 3 | | 89 / 75 °F | Thunderstorms. Mostly cloudy. | 92 °F | 7 mph | ↑ | 48% | 93% | 0.24" | 5 (Moderate) | 5:41 am | 8:29 pm |
| Fri Jul 4 | | 90 / 75 °F | Isolated tstorms late. Broken clouds. | 103 °F | 10 mph | ↑ | 65% | 78% | 0.13" | 5 (Moderate) | 5:41 am | 8:28 pm |
| Sat Jul 5 |  | 94 / 75 °F | Mostly cloudy. | 110 °F | 2 mph | ↑ | 59% | 5% | 0.00" | 5 (Moderate) | 5:42 am | 8:28 pm |
| Sun Jul 6 | | 96 / 76 °F | Tstorms late. Afternoon clouds. | 106 °F | 8 mph | ↑ | 47% | 75% | 0.08" | 5 (Moderate) | 5:42 am | 8:28 pm |
| Mon Jul 7 | | 94 / 76 °F | Thundershowers. Partly cloudy. | 117 °F | 9 mph | ↑ | 68% | 85% | 0.14" | 5 (Moderate) | 5:43 am | 8:28 pm |
| Tue Jul 8 |  | 90 / 74 °F | Overcast. | 107 °F | 9 mph | ↑ | 71% | 48% | 0.00" | 3 (Moderate) | 5:44 am | 8:27 pm |
| * Updated Monday, June 23, 2025 10:24:09 pm O'Fallon time - Weather by CustomWeather, © 2025 | ||||||||||||