Currently: 82 °F. Sunny. (Weather station: Southern Illinois Airport, USA). See more current weatherPast Weather in Mount Vernon — Graph
°F
Time
Wind
(mph)
(mph)
Temp
(°F)
(°F)
68
70
72
74
76
78
80
82
84
86
88
90
92
Fri, Jul 4
Lo:90
12 pm
Hi:90
6
Lo:73
6 pm
Hi:88
2
Sat, Jul 5
Lo:72
12 am
Hi:73
0
Lo:73
6 am
Hi:90
5
Lo:90
12 pm
Hi:90
11
Lo:72
6 pm
Hi:88
3
Sun, Jul 6
Lo:72
12 am
Hi:73
1
Lo:73
6 am
Hi:86
7
Lo:81
12 pm
Hi:88
9
Lo:73
6 pm
Hi:81
4
Mon, Jul 7
Lo:72
12 am
Hi:72
5
Lo:72
6 am
Hi:82
2
Lo:73
12 pm
Hi:81
6
Lo:73
6 pm
Hi:81
4
Tue, Jul 8
Lo:72
12 am
Hi:73
2
Lo:72
6 am
Hi:77
4
Lo:79
12 pm
Hi:84
8
Lo:73
6 pm
Hi:82
4
Wed, Jul 9
Lo:72
12 am
Hi:72
2
Lo:72
6 am
Hi:82
1
Lo:82
12 pm
Hi:86
4
Lo:73
6 pm
Hi:86
3
Thu, Jul 10
Lo:70
12 am
Hi:73
0
Lo:70
6 am
Hi:88
1
Lo:88
12 pm
Hi:90
4
Lo:75
6 pm
Hi:86
4
Fri, Jul 11
Lo:72
12 am
Hi:73
1
Lo:73
6 am
Hi:90
7
Lo:90
12 pm
Hi:91
12
Lo:81
6 pm
Hi:88
8
Sat, Jul 12
Lo:75
12 am
Hi:81
8
Lo:77
6 am
Hi:84
11
Lo:82
12 pm
Hi:86
8
Lo:73
6 pm
Hi:86
6
Sun, Jul 13
Lo:72
12 am
Hi:73
2
Lo:73
6 am
Hi:84
5
Lo:75
12 pm
Hi:88
9
Lo:73
6 pm
Hi:81
6
Mon, Jul 14
12 am
N/A
0
Lo:73
6 am
Hi:81
1
Lo:81
12 pm
Hi:84
6
Lo:73
6 pm
Hi:82
1
Tue, Jul 15
Lo:72
12 am
Hi:73
1
Lo:72
6 am
Hi:86
4
Lo:75
12 pm
Hi:88
7
Lo:73
6 pm
Hi:75
6
Wed, Jul 16
Lo:73
12 am
Hi:75
4
Lo:75
6 am
Hi:88
6
Lo:86
12 pm
Hi:90
9
Lo:79
6 pm
Hi:88
5
Thu, Jul 17
Lo:75
12 am
Hi:77
2
Lo:79
6 am
Hi:86
7
Lo:73
12 pm
Hi:84
7
Lo:73
6 pm
Hi:75
4
Fri, Jul 18
Lo:72
12 am
Hi:73
0
Lo:73
6 am
Hi:81
3
Lo:84
12 pm
Hi:86
2
Lo:73
6 pm
Hi:81
7
Sat, Jul 19
12 am
N/A
0
Lo:73
6 am
Hi:90
8
Lo:77
12 pm
Hi:91
8
Friday, July 4, 2025, 12:00 pm — 6:00 pm
90 / 90 °F
Passing clouds.
Humidity: 48%
Barometer: 30.03 "Hg
SSW
Wind: 5.593 mph
Mount Vernon Temperature Yesterday
Maximum temperature yesterday: 86 °F (at 2:52 pm)
Minimum temperature yesterday: 72 °F (at 4:17 am)
Average temperature yesterday: 76 °F
High & Low Weather Summary for the Past Weeks
| Temperature | Humidity | Pressure | |
|---|---|---|---|
| High | 91 °F (Jul 19, 1:52 pm) | 100% (Jul 7, 10:58 pm) | 30.13 "Hg (Jul 7, 10:58 pm) |
| Low | 70 °F (Jul 10, 4:52 am) | 40% (Jul 19, 10:50 am) | 29.87 "Hg (Jul 11, 5:52 pm) |
| Average | 78 °F | 85% | 29.99 "Hg |
| * Reported Jul 4 4:52 pm — Jul 19 4:52 pm, Mount Vernon. 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
Mount Vernon Weather History for the Previous 24 Hours
Scroll right to see more
| Conditions | Comfort | |||||||
|---|---|---|---|---|---|---|---|---|
| Time | Temp | Weather | Wind | Humidity | Barometer | Visibility | ||
| 4:52 pm Sat, Jul 19 |  | 79 °F | Mostly cloudy. | 8 mph | ↑ | 89% | 29.98 "Hg | 5 mi |
| 4:08 pm |  | 77 °F | Rain. Fog. | 7 mph | ↑ | 94% | 30.00 "Hg | 3 mi |
| 3:52 pm |  | 79 °F | Light rain. Fog. | 6 mph | ↑ | 84% | 29.99 "Hg | 5 mi |
| 3:06 pm |  | 82 °F | Thundershowers. Partly sunny. | 9 mph | ↑ | 79% | 29.97 "Hg | 8 mi |
| 2:52 pm | | 90 °F | Broken clouds. | 5 mph | ↑ | 71% | 29.96 "Hg | 9 mi |
| 1:52 pm |  | 91 °F | Scattered clouds. | 12 mph | ↑ | 67% | 29.97 "Hg | 10 mi |
| 12:52 pm | | 90 °F | Broken clouds. | 12 mph | ↑ | 71% | 29.98 "Hg | 10 mi |
| 11:52 am | | 90 °F | Scattered clouds. | 12 mph | ↑ | 71% | 30.01 "Hg | 9 mi |
| 10:50 am | | 88 °F | Passing clouds. | 10 mph | ↑ | 40% | 30.02 "Hg | 9 mi |
| 9:52 am | | 86 °F | Sunny. | 9 mph | ↑ | 79% | 30.02 "Hg | 9 mi |
| 8:52 am | | 82 °F | Sunny. | 9 mph | ↑ | 84% | 30.02 "Hg | 9 mi |
| 7:52 am |  | 77 °F | Fog. | 5 mph | ↑ | 94% | 30.03 "Hg | 6 mi |
| 6:52 am | | 73 °F | Passing clouds. | 3 mph | ↑ | 100% | 30.02 "Hg | 5 mi |
| 8:52 pm Fri, Jul 18 |  | 73 °F | Clear. | 6 mph | ↑ | 94% | 30.05 "Hg | 10 mi |
| 7:52 pm | | 77 °F | Sunny. | 6 mph | ↑ | 89% | 30.06 "Hg | 10 mi |
| 6:52 pm | | 81 °F | Broken clouds. | 12 mph | ↑ | 79% | 30.05 "Hg | 10 mi |
| Weather by CustomWeather, © 2025 | ||||||||