Currently: 51 °F. Clear. (Weather station: Lambert-St. Louis International Airport, USA). See more current weatherPast Weather in Alton — Graph
°F
Time
Wind
(mph)
(mph)
Temp
(°F)
(°F)
47
51
55
59
63
67
71
75
79
83
87
Sun, Apr 20
Lo:57
6 pm
Hi:61
8
Mon, Apr 21
Lo:55
12 am
Hi:59
14
Lo:54
6 am
Hi:61
14
Lo:61
12 pm
Hi:70
9
Lo:57
6 pm
Hi:70
4
Tue, Apr 22
Lo:52
12 am
Hi:55
5
Lo:54
6 am
Hi:75
6
Lo:77
12 pm
Hi:79
13
Lo:63
6 pm
Hi:75
11
Wed, Apr 23
Lo:54
12 am
Hi:63
4
Lo:55
6 am
Hi:75
7
Lo:75
12 pm
Hi:79
10
Lo:64
6 pm
Hi:73
7
Thu, Apr 24
Lo:57
12 am
Hi:63
6
Lo:59
6 am
Hi:79
4
Lo:79
12 pm
Hi:82
9
Lo:72
6 pm
Hi:79
8
Fri, Apr 25
Lo:66
12 am
Hi:72
3
Lo:66
6 am
Hi:73
5
Lo:75
12 pm
Hi:81
9
Lo:64
6 pm
Hi:75
12
Sat, Apr 26
Lo:52
12 am
Hi:64
11
Lo:54
6 am
Hi:63
9
Lo:61
12 pm
Hi:64
8
Lo:57
6 pm
Hi:63
7
Sun, Apr 27
Lo:54
12 am
Hi:57
9
Lo:54
6 am
Hi:57
12
Lo:57
12 pm
Hi:63
12
Lo:57
6 pm
Hi:63
9
Mon, Apr 28
Lo:57
12 am
Hi:61
7
Lo:59
6 am
Hi:79
12
Lo:82
12 pm
Hi:88
18
Lo:79
6 pm
Hi:84
14
Tue, Apr 29
Lo:72
12 am
Hi:79
11
Lo:66
6 am
Hi:75
13
Lo:61
12 pm
Hi:64
8
Lo:59
6 pm
Hi:64
2
Wed, Apr 30
Lo:59
12 am
Hi:61
5
Lo:57
6 am
Hi:66
11
Lo:70
12 pm
Hi:73
9
Lo:68
6 pm
Hi:72
9
Thu, May 1
Lo:64
12 am
Hi:68
11
Lo:64
6 am
Hi:70
12
Lo:64
12 pm
Hi:79
12
Lo:66
6 pm
Hi:75
6
Fri, May 2
Lo:57
12 am
Hi:64
9
Lo:57
6 am
Hi:66
5
Lo:64
12 pm
Hi:66
8
Lo:57
6 pm
Hi:64
7
Sat, May 3
Lo:54
12 am
Hi:55
7
Lo:54
6 am
Hi:55
10
Lo:54
12 pm
Hi:54
9
Lo:54
6 pm
Hi:54
7
Sun, May 4
Lo:48
12 am
Hi:54
7
Lo:48
6 am
Hi:59
9
Lo:59
12 pm
Hi:63
10
Lo:52
6 pm
Hi:61
7
Mon, May 5
Lo:48
12 am
Hi:52
4
Lo:52
6 am
Hi:55
7
Lo:55
12 pm
Hi:61
4
Lo:52
6 pm
Hi:61
3
Alton Temperature Yesterday
Maximum temperature yesterday: 60 °F (at 5:51 pm)
Minimum temperature yesterday: 48 °F (at 1:51 am)
Average temperature yesterday: 54 °F
High & Low Weather Summary for the Past Weeks
| Temperature | Humidity | Pressure | |
|---|---|---|---|
| High | 87 °F (Apr 28, 3:51 pm) | 90% (Apr 25, 3:36 am) | 30.28 "Hg (Apr 25, 3:36 am) |
| Low | 48 °F (May 4, 5:51 am) | 36% (Apr 23, 2:51 pm) | 29.68 "Hg (May 1, 3:51 am) |
| Average | 63 °F | 69% | 29.99 "Hg |
| * Reported Apr 20 10:51 pm — May 5 10:51 pm, Alton. 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
Alton Weather History for the Previous 24 Hours
Scroll right to see more
| Conditions | Comfort | |||||||
|---|---|---|---|---|---|---|---|---|
| Time | Temp | Weather | Wind | Humidity | Barometer | Visibility | ||
| 10:51 pm Mon, May 5 |  | 52 °F | Passing clouds. | No wind | ↑ | 83% | 30.02 "Hg | 10 mi |
| 9:51 pm | | 53 °F | Passing clouds. | 3 mph | ↑ | 80% | 30.02 "Hg | 10 mi |
| 8:51 pm | | 53 °F | Passing clouds. | 3 mph | ↑ | 77% | 30.00 "Hg | 10 mi |
| 7:51 pm |  | 57 °F | Passing clouds. | 3 mph | ↑ | 69% | 30.00 "Hg | 10 mi |
| 6:51 pm | | 60 °F | Passing clouds. | 5 mph | ↑ | 65% | 30.00 "Hg | 10 mi |
| 5:51 pm |  | 60 °F | Sunny. | 3 mph | ↑ | 62% | 29.99 "Hg | 10 mi |
| 4:51 pm |  | 58 °F | More clouds than sun. | 3 mph | ↑ | 70% | 29.99 "Hg | 10 mi |
| 3:51 pm | | 58 °F | Mostly cloudy. | 6 mph | ↑ | 70% | 29.98 "Hg | 10 mi |
| 3:28 pm | | 59 °F | More clouds than sun. | No wind | ↑ | 67% | 29.98 "Hg | 10 mi |
| 2:51 pm |  | 58 °F | Overcast. | 6 mph | ↑ | 67% | 29.98 "Hg | 10 mi |
| 1:51 pm | | 59 °F | Overcast. | 5 mph | ↑ | 67% | 29.98 "Hg | 10 mi |
| 12:51 pm | | 56 °F | Overcast. | 5 mph | ↑ | 72% | 30.00 "Hg | 10 mi |
| 11:51 am |  | 53 °F | Drizzle. Overcast. | 7 mph | ↑ | 77% | 30.01 "Hg | 5 mi |
| 10:51 am | | 54 °F | Overcast. | 8 mph | ↑ | 69% | 30.00 "Hg | 10 mi |
| 10:33 am | | 55 °F | Mostly cloudy. | 9 mph | ↑ | 67% | 29.99 "Hg | 10 mi |
| 9:51 am | | 54 °F | Overcast. | 8 mph | ↑ | 67% | 29.98 "Hg | 10 mi |
| 9:02 am | | 54 °F | Overcast. | 8 mph | ↑ | 69% | 29.97 "Hg | 10 mi |
| 8:51 am | | 54 °F | Overcast. | 8 mph | ↑ | 69% | 29.96 "Hg | 10 mi |
| 8:18 am | | 53 °F | Overcast. | 7 mph | ↑ | 69% | 29.96 "Hg | 10 mi |
| 7:51 am | | 53 °F | Overcast. | 6 mph | ↑ | 69% | 29.97 "Hg | 10 mi |
| 6:51 am | | 52 °F | Overcast. | 5 mph | ↑ | 72% | 29.95 "Hg | 10 mi |
| 5:51 am |  | 51 °F | Overcast. | 6 mph | ↑ | 74% | 29.93 "Hg | 10 mi |
| 4:51 am | | 51 °F | Overcast. | 3 mph | ↑ | 77% | 29.92 "Hg | 10 mi |
| 3:51 am | | 51 °F | Overcast. | 3 mph | ↑ | 77% | 29.93 "Hg | 10 mi |
| 2:51 am | | 49 °F | Passing clouds. | 5 mph | ↑ | 80% | 29.92 "Hg | 10 mi |
| 1:51 am | | 48 °F | Passing clouds. | 5 mph | ↑ | 80% | 29.92 "Hg | 10 mi |
| 12:51 am | | 51 °F | Passing clouds. | No wind | ↑ | 71% | 29.95 "Hg | 10 mi |
| Weather by CustomWeather, © 2025 | ||||||||