Alton forecast & conditions
Current conditions, the 7-day outlook and hour-by-hour details for Alton, straight from the National Weather Service. Watches and warnings show up first.
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7-Day forecast
What a year in Alton feels like
Alton has chilly winters and warm summers, with plenty of rain. A typical July afternoon reaches 88°, a January night drops to 24°, and about 8 inches of snow falls in a normal winter.
15° warmer than normal today. The forecast high is 90°, and a typical Oct 1 in Alton peaks around 75°.Live forecast: National Weather Service · Normal: NOAA 1991–2020
NOAA U.S. Climate Normals, 1991–2020. A normal is a 30-year average, not a forecast.
Data from the U.S. National Weather Service (weather.gov) — free public data, not modified by TownTapestry. Not a substitute for official warnings; always follow weather.gov and local authorities.