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 August 2026 Wed 22.4 ° C ( 72.3°F )  Clear |
Feels Like : 22.5 ° C / 72.5°F Humidity : % 71 Pressure : 1016 mb Wind Speed : 11.9 kmph / 7.4 miles from SSE 
Visibility : 10 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 August 2026 Wed | Sunny |
20.2 ° C | 30.9 ° C | 25.4 ° C | % 68 | 15.5 km/h | 17% |
| 06 August 2026 Thu | Sunny |
20.9 ° C | 28.5 ° C | 24.1 ° C | % 82 | 18 km/h | 72% |
| 07 August 2026 Fri | Sunny |
21.1 ° C | 31.4 ° C | 25.5 ° C | % 79 | 21.6 km/h | 58% |
| 08 August 2026 Sat | Sunny |
20.6 ° C | 33.5 ° C | 26.8 ° C | % 71 | 21.2 km/h | 17% |
| 09 August 2026 Sun | Sunny |
23.3 ° C | 35.3 ° C | 29.5 ° C | % 61 | 19.1 km/h | 4% |
| 10 August 2026 Mon | Sunny |
23.8 ° C | 37.4 ° C | 29.7 ° C | % 60 | 20.2 km/h | 57% |
| 11 August 2026 Tue |  Patchy rain nearby |
21.5 ° C | 28.7 ° C | 24.7 ° C | % 84 | 17.3 km/h | 80% |
| 12 August 2026 Wed | Patchy rain nearby |
18.9 ° C | 27.8 ° C | 22.8 ° C | % 89 | 16.9 km/h | 87% |
| 13 August 2026 Thu |  Partly Cloudy |
17.2 ° C | 25.2 ° C | 20.8 ° C | % 86 | 14.8 km/h | 71% |
| 14 August 2026 Fri | Patchy rain nearby |
17.1 ° C | 24 ° C | 20.5 ° C | % 86 | 11.5 km/h | 64% |
| 15 August 2026 Sat |  Light rain |
19.5 ° C | 21.6 ° C | 20.7 ° C | % 98 | 17.6 km/h | 94% |
| 16 August 2026 Sun |  Overcast |
20.8 ° C | 23.3 ° C | 21.6 ° C | % 96 | 18 km/h | 93% |
| 17 August 2026 Mon | Patchy rain nearby |
19.7 ° C | 25.7 ° C | 22.6 ° C | % 89 | 12.2 km/h | 68% |
| 18 August 2026 Tue |  Mist |
18.4 ° C | 28.2 ° C | 22.8 ° C | % 84 | 13.3 km/h | 14% |
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