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
| 01 February 2026 Sun -12.3 ° C ( 9.9°F )  Clear |
Feels Like : -17 ° C / 1.4°F Humidity : % 71 Pressure : 1032 mb Wind Speed : 7.6 kmph / 4.7 miles from NW 
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 |
|---|---|---|---|---|---|---|---|
| 31 January 2026 Sat | Sunny |
-18 ° C | -5.2 ° C | -13 ° C | % 68 | 22.7 km/h | 0% |
| 01 February 2026 Sun |  Overcast |
-21 ° C | -2.7 ° C | -11.2 ° C | % 73 | 15.8 km/h | 0% |
| 02 February 2026 Mon |  Mist |
-10.4 ° C | 2.3 ° C | -3.6 ° C | % 92 | 9.7 km/h | 0% |
| 03 February 2026 Tue | Overcast |
-7.4 ° C | -0.3 ° C | -1.5 ° C | % 93 | 16.9 km/h | 0% |
| 04 February 2026 Wed | Sunny |
-9.9 ° C | -0.7 ° C | -4.7 ° C | % 83 | 13.7 km/h | 0% |
| 05 February 2026 Thu |  Partly Cloudy |
-6.8 ° C | 2.7 ° C | -3.5 ° C | % 82 | 11.5 km/h | 0% |
| 06 February 2026 Fri | Overcast |
-2.2 ° C | 6.4 ° C | 1.2 ° C | % 81 | 23.4 km/h | 0% |
| 07 February 2026 Sat | Sunny |
-5.9 ° C | -1.2 ° C | -3.8 ° C | % 58 | 14.8 km/h | 0% |
| 08 February 2026 Sun |  Cloudy |
-5 ° C | 0.9 ° C | -2.4 ° C | % 55 | 9.7 km/h | 0% |
| 09 February 2026 Mon | Sunny |
-7.9 ° C | -3.4 ° C | -5.4 ° C | % 50 | 23 km/h | 0% |
| 10 February 2026 Tue | Partly Cloudy |
-8.1 ° C | -1.7 ° C | -5.4 ° C | % 35 | 15.5 km/h | 0% |
| 11 February 2026 Wed | Overcast |
-6 ° C | 0 ° C | -3.1 ° C | % 48 | 19.4 km/h | 0% |
| 12 February 2026 Thu |  Moderate rain |
-0.7 ° C | 2.5 ° C | 1 ° C | % 88 | 20.5 km/h | 80% |
| 13 February 2026 Fri | Moderate rain |
-0.3 ° C | 2.8 ° C | 1.7 ° C | % 97 | 19.8 km/h | 87% |
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