Currently: 74 °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)
66
69
72
75
78
81
84
87
90
93
96
99
Jun 15 – Jun 21
Lo:67
Fri, 20
Hi:93
10
Lo:77
Sat, 21
Hi:98
12
Jun 22 – Jun 28
Lo:77
Sun, 22
Hi:99
8
0.66
Lo:79
Mon, 23
Hi:97
5
0.17
Lo:77
Tue, 24
Hi:95
6
0.07
Lo:77
Wed, 25
Hi:95
4
0.67
Lo:72
Thu, 26
Hi:95
4
0.04
Lo:74
Fri, 27
Hi:88
5
0.02
Lo:75
Sat, 28
Hi:89
7
Jun 29 – Jul 5
0.56
Lo:76
Sun, 29
Hi:89
8
0.02
Lo:75
Mon, 30
Hi:89
8
Lo:78
Tue, 1
Hi:90
8
0.36
Lo:79
Wed, 2
Hi:93
10
0.02
Lo:83
Thu, 3
Hi:96
5
3.98
Lo:83
Fri, 4
Hi:94
5
Fri, Jun 20
93 / 67 °F
Scattered clouds.
Feels Like: 94 °F
Humidity: 43%
Precipitation: Rain: 0 Snow: 0
Precipitation Chance: 0%
S
Wind: 10 mph
2 Week Extended Forecast in O'Fallon, Illinois, USA
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| Conditions | Comfort | Precipitation | Sun | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Day | Temperature | Weather | Feels Like | Wind | Humidity | Chance | Amount | UV | Sunrise | Sunset | ||
| Fri Jun 20 |  | 93 / 67 °F | Scattered clouds. | 94 °F | 10 mph | ↑ | 43% | 0% | 0.00" | 5 (Moderate) | 5:35 am | 8:27 pm |
| Sat Jun 21 |  | 98 / 77 °F | Sunny. | 104 °F | 12 mph | ↑ | 43% | 0% | 0.00" | 10 (Very high) | 5:35 am | 8:27 pm |
| Sun Jun 22 | | 99 / 77 °F | Sunny. | 102 °F | 8 mph | ↑ | 36% | 0% | 0.00" | 10 (Very high) | 5:35 am | 8:27 pm |
| Mon Jun 23 |  | 97 / 79 °F | Tstorms late. Afternoon clouds. | 100 °F | 5 mph | ↑ | 40% | 79% | 0.66" | 10 (Very high) | 5:36 am | 8:27 pm |
| Tue Jun 24 | | 95 / 77 °F | Thundershowers. Partly cloudy. | 100 °F | 6 mph | ↑ | 44% | 55% | 0.17" | 10 (Very high) | 5:36 am | 8:27 pm |
| Wed Jun 25 |  | 95 / 77 °F | Isolated tstorms late. Broken clouds. | 99 °F | 4 mph | ↑ | 41% | 18% | 0.07" | 7 (High) | 5:36 am | 8:28 pm |
| Thu Jun 26 | | 95 / 72 °F | Tstorms late. Afternoon clouds. | 94 °F | 4 mph | ↑ | 52% | 82% | 0.67" | 5 (Moderate) | 5:37 am | 8:28 pm |
| Fri Jun 27 | | 88 / 74 °F | Isolated tstorms late. Increasing cloudiness. | 89 °F | 5 mph | ↑ | 43% | 56% | 0.04" | 3 (Moderate) | 5:37 am | 8:28 pm |
| Sat Jun 28 | | 89 / 75 °F | Isolated tstorms late. Scattered clouds. | 90 °F | 7 mph | ↑ | 47% | 22% | 0.02" | 7 (High) | 5:37 am | 8:28 pm |
| Sun Jun 29 | | 89 / 76 °F | Thunderstorms. Overcast. | 91 °F | 8 mph | ↑ | 49% | 98% | 0.56" | 3 (Moderate) | 5:38 am | 8:28 pm |
| Mon Jun 30 |  | 89 / 75 °F | Morning clouds. | 90 °F | 8 mph | ↑ | 46% | 46% | 0.02" | 7 (High) | 5:38 am | 8:28 pm |
| Tue Jul 1 | | 90 / 78 °F | Scattered clouds. | 91 °F | 8 mph | ↑ | 48% | 5% | 0.00" | 7 (High) | 5:39 am | 8:27 pm |
| Wed Jul 2 |  | 93 / 79 °F | Showers early. Broken clouds. | 94 °F | 10 mph | ↑ | 55% | 77% | 0.36" | 5 (Moderate) | 5:39 am | 8:27 pm |
| Thu Jul 3 | | 96 / 83 °F | Isolated tstorms late. Scattered clouds. | 89 °F | 5 mph | ↑ | 38% | 47% | 0.02" | 7 (High) | 5:40 am | 8:27 pm |
| Fri Jul 4 |  | 94 / 83 °F | Flash floods. Afternoon clouds. | 107 °F | 5 mph | ↑ | 74% | 99% | 3.98" | 3 (Moderate) | 5:40 am | 8:27 pm |
| * Updated Thursday, June 19, 2025 10:24:14 pm O'Fallon time - Weather by CustomWeather, © 2025 | ||||||||||||