Currently: 69 °F. Passing clouds. (Weather station: Lambert-St. Louis International Airport, USA). See more current weatherPast Weather in City of O'Fallon — Graph
°F
Time
Wind
(mph)
(mph)
Temp
(°F)
(°F)
67
70
73
76
79
82
85
88
91
94
Fri, Jun 27
Lo:79
12 am
Hi:81
9
Lo:81
6 am
Hi:88
12
Lo:73
12 pm
Hi:88
9
Lo:73
6 pm
Hi:75
3
Sat, Jun 28
Lo:72
12 am
Hi:73
2
Lo:73
6 am
Hi:88
4
Lo:81
12 pm
Hi:90
8
Lo:75
6 pm
Hi:81
6
Sun, Jun 29
Lo:73
12 am
Hi:75
6
Lo:73
6 am
Hi:77
7
Lo:79
12 pm
Hi:82
7
Lo:75
6 pm
Hi:81
4
Mon, Jun 30
Lo:73
12 am
Hi:75
3
Lo:73
6 am
Hi:82
6
Lo:82
12 pm
Hi:88
8
Lo:72
6 pm
Hi:75
8
Tue, Jul 1
Lo:70
12 am
Hi:72
4
Lo:70
6 am
Hi:82
9
Lo:84
12 pm
Hi:84
11
Lo:72
6 pm
Hi:82
5
Wed, Jul 2
Lo:68
12 am
Hi:73
2
Lo:70
6 am
Hi:86
4
Lo:86
12 pm
Hi:88
4
Lo:79
6 pm
Hi:86
5
Thu, Jul 3
Lo:73
12 am
Hi:77
1
Lo:75
6 am
Hi:88
4
Lo:90
12 pm
Hi:91
4
Lo:81
6 pm
Hi:90
4
Fri, Jul 4
Lo:75
12 am
Hi:79
1
Lo:75
6 am
Hi:90
6
Lo:90
12 pm
Hi:91
9
Lo:82
6 pm
Hi:90
7
Sat, Jul 5
Lo:75
12 am
Hi:81
3
Lo:79
6 am
Hi:90
10
Lo:90
12 pm
Hi:91
10
Lo:82
6 pm
Hi:90
11
Sun, Jul 6
Lo:81
12 am
Hi:82
9
Lo:81
6 am
Hi:90
11
Lo:79
12 pm
Hi:91
11
Lo:75
6 pm
Hi:82
9
Mon, Jul 7
Lo:73
12 am
Hi:75
7
Lo:73
6 am
Hi:84
5
Lo:86
12 pm
Hi:88
7
Lo:79
6 pm
Hi:86
7
Tue, Jul 8
Lo:73
12 am
Hi:79
4
Lo:77
6 am
Hi:88
7
Lo:72
12 pm
Hi:90
9
Lo:72
6 pm
Hi:73
2
Wed, Jul 9
Lo:70
12 am
Hi:72
5
Lo:70
6 am
Hi:82
4
Lo:82
12 pm
Hi:88
6
Lo:77
6 pm
Hi:86
2
Thu, Jul 10
Lo:72
12 am
Hi:75
2
Lo:75
6 am
Hi:88
6
Lo:90
12 pm
Hi:91
7
Lo:82
6 pm
Hi:90
7
Fri, Jul 11
Lo:75
12 am
Hi:81
7
Lo:77
6 am
Hi:90
9
Lo:88
12 pm
Hi:93
12
Lo:82
6 pm
Hi:91
12
Sat, Jul 12
Lo:70
12 am
Hi:73
12
Friday, June 27, 2025, 12:00 am — 6:00 am
81 / 79 °F
Passing clouds.
Humidity: 72%
Barometer: 29.93 "Hg
SW
Wind: 9.321 mph
City of O'Fallon Temperature Yesterday
Maximum temperature yesterday: 94 °F (at 2:51 pm)
Minimum temperature yesterday: 76 °F (at 5:51 am)
Average temperature yesterday: 86 °F
High & Low Weather Summary for the Past Weeks
| Temperature | Humidity | Pressure | |
|---|---|---|---|
| High | 94 °F (Jul 11, 2:51 pm) | 97% (Jul 8, 9:51 pm) | 30.08 "Hg (Jul 8, 9:51 pm) |
| Low | 68 °F (Jul 2, 5:51 am) | 38% (Jul 4, 3:51 pm) | 29.80 "Hg (Jul 11, 6:51 pm) |
| Average | 80 °F | 70% | 29.97 "Hg |
| * Reported Jun 27 2:51 am — Jul 12 2:13 am, City of O'Fallon. Weather by CustomWeather, © 2025 | |||
Note: Actual official high and low records may vary slightly from our data, if they occured in-between our weather recording intervals... More about our weather records
City of O'Fallon Weather History for the Previous 24 Hours
Scroll right to see more
| Conditions | Comfort | |||||||
|---|---|---|---|---|---|---|---|---|
| Time | Temp | Weather | Wind | Humidity | Barometer | Visibility | ||
| 2:13 am Sat, Jul 12 |  | 69 °F | Light rain. Mostly cloudy. | 8 mph | ↑ | 93% | 29.94 "Hg | 7 mi |
| 1:51 am | | 69 °F | Light rain. Fog. | 9 mph | ↑ | 93% | 29.92 "Hg | 4 mi |
| 1:28 am |  | 71 °F | Thunderstorms. Overcast. | 9 mph | ↑ | 84% | 29.97 "Hg | 10 mi |
| 12:51 am |  | 74 °F | Overcast. | 23 mph | ↑ | 71% | 29.90 "Hg | 10 mi |
| 11:51 pm Fri, Jul 11 |  | 83 °F | Partly cloudy. | 10 mph | ↑ | 70% | 29.86 "Hg | 10 mi |
| 10:51 pm | | 84 °F | Passing clouds. | 8 mph | ↑ | 67% | 29.85 "Hg | 10 mi |
| 9:51 pm | | 85 °F | Passing clouds. | 10 mph | ↑ | 63% | 29.84 "Hg | 10 mi |
| 8:51 pm | | 86 °F | Passing clouds. | 9 mph | ↑ | 63% | 29.81 "Hg | 10 mi |
| 8:04 pm |  | 87 °F | Broken clouds. | 12 mph | ↑ | 61% | 29.85 "Hg | 10 mi |
| 7:51 pm | | 87 °F | Thunderstorms. Broken clouds. | 12 mph | ↑ | 61% | 29.81 "Hg | 10 mi |
| 7:44 pm | | 88 °F | Thunderstorms. Broken clouds. | 15 mph | ↑ | 57% | 29.86 "Hg | 10 mi |
| 7:12 pm | | 91 °F | Broken clouds. | 14 mph | ↑ | 52% | 29.85 "Hg | 10 mi |
| 6:51 pm | | 91 °F | Thunderstorms. Broken clouds. | 14 mph | ↑ | 54% | 29.80 "Hg | 10 mi |
| 6:35 pm | | 91 °F | Thunderstorms. Broken clouds. | 14 mph | ↑ | 54% | 29.84 "Hg | 10 mi |
| 5:51 pm | | 92 °F | Broken clouds. | 15 mph | ↑ | 52% | 29.80 "Hg | 10 mi |
| 4:51 pm | | 90 °F | Partly sunny. | 10 mph | ↑ | 50% | 29.81 "Hg | 10 mi |
| 3:51 pm | | 89 °F | Partly sunny. | 13 mph | ↑ | 52% | 29.83 "Hg | 10 mi |
| 3:30 pm | | 88 °F | Broken clouds. | 10 mph | ↑ | 52% | 29.88 "Hg | 10 mi |
| 2:51 pm | | 94 °F | Broken clouds. | 12 mph | ↑ | 46% | 29.85 "Hg | 10 mi |
| 1:51 pm |  | 93 °F | Scattered clouds. | 15 mph | ↑ | 47% | 29.86 "Hg | 10 mi |
| 12:51 pm | | 91 °F | Broken clouds. | 10 mph | ↑ | 54% | 29.88 "Hg | 10 mi |
| 11:51 am | | 90 °F | Broken clouds. | 12 mph | ↑ | 57% | 29.90 "Hg | 10 mi |
| 10:51 am | | 89 °F | Scattered clouds. | 10 mph | ↑ | 59% | 29.90 "Hg | 10 mi |
| 9:51 am | | 86 °F | Partly sunny. | 6 mph | ↑ | 65% | 29.89 "Hg | 10 mi |
| 8:51 am | | 83 °F | Partly sunny. | 10 mph | ↑ | 68% | 29.89 "Hg | 10 mi |
| 7:51 am | | 79 °F | Partly sunny. | 12 mph | ↑ | 72% | 29.89 "Hg | 10 mi |
| 6:51 am | | 77 °F | Partly sunny. | 5 mph | ↑ | 74% | 29.88 "Hg | 10 mi |
| 5:51 am | | 76 °F | Partly sunny. | 7 mph | ↑ | 74% | 29.87 "Hg | 10 mi |
| 4:51 am | | 77 °F | Passing clouds. | 7 mph | ↑ | 71% | 29.86 "Hg | 10 mi |
| 3:51 am |  | 78 °F | Clear. | 7 mph | ↑ | 66% | 29.87 "Hg | 10 mi |
| Weather by CustomWeather, © 2025 | ||||||||