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
| 05 December 2025 Fri -14.6 ° C ( 5.7°F )  Overcast |
Feels Like : -19.3 ° C / -2.7°F Humidity : % 82 Pressure : 1020 mb Wind Speed : 6.8 kmph / 4.3 miles from SSE 
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 |
|---|---|---|---|---|---|---|---|
| 05 December 2025 Fri |  Cloudy |
-18.8 ° C | 2.9 ° C | -8.2 ° C | % 79 | 13.3 km/h | 0% |
| 06 December 2025 Sat |  Mist |
-2.4 ° C | 0.4 ° C | -0.6 ° C | % 95 | 14.8 km/h | 0% |
| 07 December 2025 Sun |  Fog |
-6.5 ° C | 1.5 ° C | -0.8 ° C | % 95 | 21.2 km/h | 0% |
| 08 December 2025 Mon |  Partly Cloudy |
-8.1 ° C | -1.2 ° C | -5.1 ° C | % 80 | 14.8 km/h | 0% |
| 09 December 2025 Tue | Partly Cloudy |
-4.8 ° C | 6.1 ° C | -0.3 ° C | % 81 | 23.4 km/h | 0% |
| 10 December 2025 Wed |  Patchy rain nearby |
4.4 ° C | 11.5 ° C | 7.9 ° C | % 73 | 28.1 km/h | 67% |
| 11 December 2025 Thu | Patchy rain nearby |
-1.5 ° C | 3.3 ° C | 1.2 ° C | % 75 | 17.6 km/h | 84% |
| 12 December 2025 Fri |  Sunny |
-3.9 ° C | 2.6 ° C | -1.2 ° C | % 64 | 12.6 km/h | 0% |
| 13 December 2025 Sat | Sunny |
-3.3 ° C | 4.3 ° C | -0.4 ° C | % 62 | 15.8 km/h | 0% |
| 14 December 2025 Sun | Sunny |
-1.5 ° C | 9.5 ° C | 3.7 ° C | % 64 | 23 km/h | 0% |
| 15 December 2025 Mon | Patchy rain nearby |
9.7 ° C | 14.6 ° C | 12.6 ° C | % 93 | 24.8 km/h | 85% |
| 16 December 2025 Tue | Patchy rain nearby |
12.3 ° C | 16.3 ° C | 14.1 ° C | % 93 | 19.4 km/h | 78% |
| 17 December 2025 Wed | Patchy rain nearby |
13.2 ° C | 18.8 ° C | 16 ° C | % 95 | 18.7 km/h | 82% |
| 18 December 2025 Thu | Partly Cloudy |
0.1 ° C | 4.7 ° C | 4.6 ° C | % 71 | 24.5 km/h | 0% |
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