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
| 14 December 2025 Sun -13.8 ° C ( 7.2°F )  Clear |
Feels Like : -22.8 ° C / -9.1°F Humidity : % 54 Pressure : 1038 mb Wind Speed : 20.9 kmph / 13 miles from NNW 
Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15-day weather forecast for Alton Airport, Alton, United States
| Date | Weather forecast | Low temperature | High temperature | Average Temperature | Humidity | Wind | Chance of rain |
|---|---|---|---|---|---|---|---|
| 14 December 2025 Sun | Sunny |
-14.9 ° C | -7.2 ° C | -12 ° C | % 61 | 21.6 km/h | 0% |
| 15 December 2025 Mon | Sunny |
-11.4 ° C | 4.3 ° C | -5.5 ° C | % 45 | 23.8 km/h | 0% |
| 16 December 2025 Tue |  Cloudy |
-3.9 ° C | 4.8 ° C | 0.3 ° C | % 56 | 20.5 km/h | 0% |
| 17 December 2025 Wed |  Overcast |
4.1 ° C | 11.3 ° C | 7.8 ° C | % 91 | 27 km/h | 0% |
| 18 December 2025 Thu |  Patchy rain nearby |
6.6 ° C | 15.9 ° C | 12.2 ° C | % 78 | 28.4 km/h | 78% |
| 19 December 2025 Fri | Cloudy |
4.2 ° C | 8.9 ° C | 6.5 ° C | % 50 | 25.2 km/h | 0% |
| 20 December 2025 Sat | Patchy rain nearby |
7.2 ° C | 18.1 ° C | 12.8 ° C | % 85 | 29.5 km/h | 69% |
| 21 December 2025 Sun | Sunny |
-0.8 ° C | 4.9 ° C | 1.7 ° C | % 54 | 25.9 km/h | 0% |
| 22 December 2025 Mon | Sunny |
-1.3 ° C | 10.9 ° C | 5.1 ° C | % 63 | 32.8 km/h | 0% |
| 23 December 2025 Tue | Patchy rain nearby |
-2.4 ° C | 14 ° C | 6.8 ° C | % 61 | 32.4 km/h | 84% |
| 24 December 2025 Wed |  Light freezing rain |
-4.2 ° C | 0.4 ° C | -1.8 ° C | % 44 | 20.5 km/h | 79% |
| 25 December 2025 Thu |  Moderate rain |
-1.8 ° C | 0.7 ° C | -0.1 ° C | % 98 | 15.8 km/h | 60% |
| 26 December 2025 Fri | Light freezing rain |
-9.7 ° C | -2.3 ° C | -4.3 ° C | % 92 | 24.1 km/h | 73% |
| 27 December 2025 Sat | Light freezing rain |
-11 ° C | -7.4 ° C | -9.1 ° C | % 86 | 15.1 km/h | 77% |
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