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 March 2026 Sat 4.1 ° C ( 39.4°F )  Sunny |
Feels Like : 0.9 ° C / 33.5°F Humidity : % 65 Pressure : 1021 mb Wind Speed : 13.7 kmph / 8.5 miles from E 
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 March 2026 Sat | Sunny |
3 ° C | 19.4 ° C | 9.6 ° C | % 57 | 23.8 km/h | 0% |
| 15 March 2026 Sun |  Moderate rain |
4.1 ° C | 14 ° C | 11.9 ° C | % 90 | 45 km/h | 87% |
| 16 March 2026 Mon |  Moderate or heavy snow showers |
-6.3 ° C | -4.5 ° C | -3.7 ° C | % 77 | 43.2 km/h | 68% |
| 17 March 2026 Tue | Sunny |
-11 ° C | -0.1 ° C | -5.8 ° C | % 48 | 24.5 km/h | 0% |
| 18 March 2026 Wed |  Patchy rain nearby |
-1.3 ° C | 15.9 ° C | 5.3 ° C | % 62 | 29.9 km/h | 61% |
| 19 March 2026 Thu |  Cloudy |
4.6 ° C | 15.7 ° C | 9.2 ° C | % 74 | 15.1 km/h | 0% |
| 20 March 2026 Fri | Cloudy |
9.3 ° C | 14.6 ° C | 11.4 ° C | % 80 | 19.4 km/h | 0% |
| 21 March 2026 Sat | Sunny |
7.8 ° C | 22.6 ° C | 14.3 ° C | % 74 | 10.8 km/h | 0% |
| 22 March 2026 Sun | Sunny |
11.6 ° C | 23.9 ° C | 17.1 ° C | % 74 | 26.6 km/h | 0% |
| 23 March 2026 Mon | Sunny |
13.2 ° C | 30.4 ° C | 20.9 ° C | % 65 | 24.8 km/h | 0% |
| 24 March 2026 Tue | Sunny |
17.7 ° C | 28.4 ° C | 22.3 ° C | % 56 | 28.8 km/h | 0% |
| 25 March 2026 Wed | Moderate rain |
7.8 ° C | 11 ° C | 9.8 ° C | % 88 | 22.7 km/h | 85% |
| 26 March 2026 Thu |  Partly Cloudy |
7.8 ° C | 26.5 ° C | 17 ° C | % 75 | 31.3 km/h | 0% |
| 27 March 2026 Fri | Moderate rain |
11.8 ° C | 19.8 ° C | 17.6 ° C | % 80 | 31.3 km/h | 85% |
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