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Alton
Average humidity
ClimateForecastNovemberDecember >>

Average humidity in Alton (IL)

The mean monthly relative humidity over the year in Alton (Illinois), the United States of America.

* Data from: St. Louis, the United States of America (29 KM, 18 Miles).
  • On average, December is the most humid month, at 74.0%.
  • On average, April is the least humid month, at 63.0%.
  • The average annual percentage of humidity is 68%.

Forecast for Alton (IL)

Sat   Nov 02
18°C | 4°C
SE 18 km/h
almost clear and no rain

almost clear and no rain

hourly forecast
Sun   Nov 03
21°C | 9°C
SE 25 km/h
2.6 mm
broken clouds and rain

broken clouds and rain

hourly forecast
Mon   Nov 04
23°C | 16°C
S 29 km/h
22 mm
overcast and thunder

overcast and thunder

hourly forecast
5-Day Forecast 10-Day Forecast

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