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
| 24 April 2026 Fri 21.1 ° C ( 70°F )  Patchy light rain with thunder |
Feels Like : 21.1 ° C / 70°F Humidity : % 71 Pressure : 1006 mb Wind Speed : 18.7 kmph / 11.6 miles from S 
Visibility : 16 km Precipitation (rainfall) : 0 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 |
|---|---|---|---|---|---|---|---|
| 24 April 2026 Fri |  Moderate rain |
15.3 ° C | 23.1 ° C | 18.8 ° C | % 76 | 24.5 km/h | 88% |
| 25 April 2026 Sat |  Sunny |
10.5 ° C | 22.8 ° C | 16.5 ° C | % 65 | 17.6 km/h | 0% |
| 26 April 2026 Sun | Sunny |
10.4 ° C | 22.4 ° C | 16.4 ° C | % 69 | 22.3 km/h | 0% |
| 27 April 2026 Mon | Moderate rain |
15.3 ° C | 25.5 ° C | 18.9 ° C | % 85 | 41.4 km/h | 89% |
| 28 April 2026 Tue |  Partly Cloudy |
10.8 ° C | 19.3 ° C | 14.2 ° C | % 78 | 24.5 km/h | 0% |
| 29 April 2026 Wed | Partly Cloudy |
11.9 ° C | 18.4 ° C | 14.6 ° C | % 64 | 16.2 km/h | 0% |
| 30 April 2026 Thu | Partly Cloudy |
10.2 ° C | 15.2 ° C | 12.3 ° C | % 66 | 22.7 km/h | 0% |
| 01 May 2026 Fri | Sunny |
7.5 ° C | 18.4 ° C | 13 ° C | % 57 | 9.4 km/h | 0% |
| 02 May 2026 Sat | Partly Cloudy |
10.1 ° C | 19.3 ° C | 14.4 ° C | % 62 | 15.1 km/h | 0% |
| 03 May 2026 Sun | Partly Cloudy |
10.2 ° C | 18.5 ° C | 13.5 ° C | % 65 | 16.2 km/h | 0% |
| 04 May 2026 Mon |  Patchy rain nearby |
9 ° C | 20.7 ° C | 14.7 ° C | % 72 | 15.5 km/h | 79% |
| 05 May 2026 Tue | Patchy rain nearby |
12.3 ° C | 19.4 ° C | 15.6 ° C | % 75 | 11.5 km/h | 89% |
| 06 May 2026 Wed | Partly Cloudy |
13 ° C | 26.1 ° C | 18.5 ° C | % 76 | 24.5 km/h | 0% |
| 07 May 2026 Thu | Patchy rain nearby |
8.6 ° C | 17.1 ° C | 12.6 ° C | % 64 | 16.6 km/h | 72% |
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