Alton Airport (ALN) 15 Day Weather Forecast, Alton United States
Current weather conditions and 15 day weather forecast for Alton Airport in Alton, United States including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain, wind speed, cloud, pressure, and UV index.
Current weather conditions at ALN
| 18 December 2025 Thu 7.3 ° C ( 45.1°F )  Light rain |
Feels Like : 3.6 ° C / 38.5°F Humidity : % 93 Pressure : 1001 mb Wind Speed : 23.8 kmph / 14.8 miles from WNW 
Visibility : 11 km Precipitation (rainfall) : 1.28 mm Cloud (%) : 100 |
15-day weather forecast for Alton Airport, Alton, United States
| Date | Weather forecast | Low temperature | High temperature | Average Temperature | Humidity | Wind | Chance of rain |
|---|---|---|---|---|---|---|---|
| 18 December 2025 Thu |  Moderate rain |
0.2 ° C | 15.1 ° C | 9.2 ° C | % 86 | 41.8 km/h | 83% |
| 19 December 2025 Fri |  Sunny |
-4.4 ° C | 4.6 ° C | -0.9 ° C | % 64 | 33.8 km/h | 0% |
| 20 December 2025 Sat |  Cloudy |
-1.9 ° C | 11.4 ° C | 3.3 ° C | % 76 | 27 km/h | 0% |
| 21 December 2025 Sun | Sunny |
-1.8 ° C | 6.6 ° C | 2.1 ° C | % 60 | 19.1 km/h | 0% |
| 22 December 2025 Mon |  Patchy rain nearby |
1 ° C | 6 ° C | 2.8 ° C | % 56 | 18.7 km/h | 62% |
| 23 December 2025 Tue | Cloudy |
4.5 ° C | 12.3 ° C | 7.9 ° C | % 71 | 10.4 km/h | 0% |
| 24 December 2025 Wed | Patchy rain nearby |
10.6 ° C | 20.8 ° C | 16.1 ° C | % 85 | 27 km/h | 88% |
| 25 December 2025 Thu | Sunny |
8 ° C | 19.5 ° C | 15.3 ° C | % 68 | 23.8 km/h | 0% |
| 26 December 2025 Fri |  Partly Cloudy |
3.2 ° C | 9.2 ° C | 5.5 ° C | % 49 | 18.4 km/h | 0% |
| 27 December 2025 Sat | Partly Cloudy |
0.1 ° C | 6.7 ° C | 3.2 ° C | % 47 | 19.4 km/h | 0% |
| 28 December 2025 Sun | Partly Cloudy |
-4.4 ° C | -0.8 ° C | -1.6 ° C | % 51 | 23.4 km/h | 0% |
| 29 December 2025 Mon | Sunny |
-7.9 ° C | -2.3 ° C | -5.6 ° C | % 37 | 18.4 km/h | 0% |
| 30 December 2025 Tue | Sunny |
-7.4 ° C | 0.3 ° C | -4.4 ° C | % 34 | 11.5 km/h | 0% |
| 31 December 2025 Wed | Partly Cloudy |
-5.7 ° C | 1.9 ° C | -2.4 ° C | % 34 | 9.4 km/h | 0% |
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