Currently: 53 °F. Passing clouds. (Weather station: Lambert-St. Louis International Airport, USA). See more current weatherPast Weather in Alton — Graph
°F
Time
Wind
(mph)
(mph)
Temp
(°F)
(°F)
50
54
58
62
66
70
74
78
82
86
Thu, May 8
Lo:61
12 am
Hi:61
4
Lo:59
6 am
Hi:61
6
Lo:64
12 pm
Hi:72
7
Lo:61
6 pm
Hi:70
7
Fri, May 9
Lo:52
12 am
Hi:61
7
Lo:52
6 am
Hi:66
9
Lo:68
12 pm
Hi:72
10
Lo:55
6 pm
Hi:70
2
Sat, May 10
Lo:52
12 am
Hi:54
2
Lo:52
6 am
Hi:72
3
Lo:73
12 pm
Hi:77
4
Lo:61
6 pm
Hi:73
2
Sun, May 11
Lo:57
12 am
Hi:61
7
Lo:57
6 am
Hi:75
6
Lo:75
12 pm
Hi:81
11
Lo:70
6 pm
Hi:79
7
Mon, May 12
Lo:64
12 am
Hi:70
4
Lo:64
6 am
Hi:70
5
Lo:68
12 pm
Hi:72
7
Lo:64
6 pm
Hi:70
7
Tue, May 13
Lo:63
12 am
Hi:66
2
Lo:64
6 am
Hi:73
2
Lo:75
12 pm
Hi:81
4
Lo:70
6 pm
Hi:79
7
Wed, May 14
Lo:63
12 am
Hi:70
5
Lo:64
6 am
Hi:81
10
Lo:82
12 pm
Hi:84
17
Lo:75
6 pm
Hi:82
11
Thu, May 15
Lo:73
12 am
Hi:75
9
Lo:73
6 am
Hi:88
11
Lo:84
12 pm
Hi:88
15
Lo:70
6 pm
Hi:84
13
Fri, May 16
Lo:63
12 am
Hi:70
4
Lo:66
6 am
Hi:82
9
Lo:64
12 pm
Hi:84
16
Lo:72
6 pm
Hi:81
14
Sat, May 17
Lo:63
12 am
Hi:70
14
Lo:61
6 am
Hi:70
17
Lo:72
12 pm
Hi:75
16
Lo:63
6 pm
Hi:73
7
Sun, May 18
Lo:61
12 am
Hi:63
3
Lo:61
6 am
Hi:72
6
Lo:73
12 pm
Hi:79
7
Lo:70
6 pm
Hi:75
9
Mon, May 19
Lo:68
12 am
Hi:70
7
Lo:70
6 am
Hi:79
12
Lo:81
12 pm
Hi:82
17
Lo:72
6 pm
Hi:82
13
Tue, May 20
Lo:66
12 am
Hi:72
11
Lo:66
6 am
Hi:79
11
Lo:79
12 pm
Hi:82
18
Lo:64
6 pm
Hi:79
14
Wed, May 21
Lo:57
12 am
Hi:64
12
Lo:59
6 am
Hi:68
19
Lo:70
12 pm
Hi:73
18
Lo:61
6 pm
Hi:72
10
Thu, May 22
Lo:52
12 am
Hi:61
7
Lo:55
6 am
Hi:64
13
Lo:66
12 pm
Hi:72
17
Lo:55
6 pm
Hi:64
7
Fri, May 23
Lo:52
12 am
Hi:54
1
Alton Temperature Yesterday
Maximum temperature yesterday: 71 °F (at 2:51 pm)
Minimum temperature yesterday: 52 °F (at 4:51 am)
Average temperature yesterday: 61 °F
High & Low Weather Summary for the Past Weeks
| Temperature | Humidity | Pressure | |
|---|---|---|---|
| High | 88 °F (May 15, 12:51 pm) | 94% (May 13, 12:51 am) | 30.21 "Hg (May 13, 12:51 am) |
| Low | 51 °F (May 9, 5:51 am) | 24% (May 10, 2:51 pm) | 29.49 "Hg (May 16, 1:51 pm) |
| Average | 69 °F | 62% | 29.85 "Hg |
| * Reported May 8 5:23 am — May 23 5:51 am, 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 | ||
| 5:51 am Fri, May 23 | | 51 °F | Passing clouds. | 3 mph | ↑ | 83% | 30.12 "Hg | 10 mi |
| 4:51 am |  | 51 °F | Passing clouds. | No wind | ↑ | 83% | 30.11 "Hg | 10 mi |
| 3:51 am |  | 52 °F | Clear. | No wind | ↑ | 77% | 30.09 "Hg | 10 mi |
| 2:51 am | | 51 °F | Clear. | No wind | ↑ | 80% | 30.09 "Hg | 10 mi |
| 1:51 am | | 53 °F | Clear. | No wind | ↑ | 72% | 30.09 "Hg | 10 mi |
| 12:51 am | | 54 °F | Clear. | 3 mph | ↑ | 72% | 30.10 "Hg | 10 mi |
| 11:51 pm Thu, May 22 | | 56 °F | Passing clouds. | 3 mph | ↑ | 65% | 30.11 "Hg | 10 mi |
| 10:51 pm | | 57 °F | Clear. | 6 mph | ↑ | 62% | 30.11 "Hg | 10 mi |
| 9:51 pm | | 57 °F | Passing clouds. | 6 mph | ↑ | 62% | 30.10 "Hg | 10 mi |
| 8:51 pm | | 59 °F | Passing clouds. | 6 mph | ↑ | 60% | 30.09 "Hg | 10 mi |
| 7:51 pm | | 62 °F | Scattered clouds. | 9 mph | ↑ | 52% | 30.07 "Hg | 10 mi |
| 6:51 pm |  | 64 °F | Broken clouds. | 10 mph | ↑ | 47% | 30.06 "Hg | 10 mi |
| 5:51 pm | | 66 °F | Partly sunny. | 15 mph | ↑ | 43% | 30.05 "Hg | 10 mi |
| 4:51 pm | | 70 °F | Broken clouds. | 13 mph | ↑ | 41% | 30.03 "Hg | 10 mi |
| 3:51 pm | | 71 °F | Partly sunny. | 17 mph | ↑ | 38% | 30.02 "Hg | 10 mi |
| 2:51 pm | | 71 °F | Passing clouds. | 22 mph | ↑ | 38% | 30.02 "Hg | 10 mi |
| 1:51 pm | | 68 °F | Passing clouds. | 17 mph | ↑ | 42% | 30.02 "Hg | 10 mi |
| 12:51 pm | | 68 °F | Passing clouds. | 16 mph | ↑ | 40% | 30.04 "Hg | 10 mi |
| 11:51 am | | 65 °F | Passing clouds. | 15 mph | ↑ | 45% | 30.06 "Hg | 10 mi |
| 10:51 am | | 64 °F | Passing clouds. | 12 mph | ↑ | 45% | 30.07 "Hg | 10 mi |
| 9:51 am | | 61 °F | Passing clouds. | 15 mph | ↑ | 50% | 30.07 "Hg | 10 mi |
| 8:51 am | | 58 °F | Passing clouds. | 13 mph | ↑ | 56% | 30.07 "Hg | 10 mi |
| 7:51 am | | 56 °F | Passing clouds. | 13 mph | ↑ | 60% | 30.06 "Hg | 10 mi |
| Weather by CustomWeather, © 2025 | ||||||||