Average Monthly Sunshine hours in Alton (IL)

This graph shows the average number of hours per month that Alton receives direct sunlight. The numbers are calculated over a 30-year period to provide a reliable average.

• On average, July is the sunniest month with 311 hours of sunshine.
• December has on average the lowest amount of sunshine with 128 hours.
• On average, the total annual amount of sun is 2612 hours.

Forecast: is it sunny in Alton (IL)?

Sat   Nov 23

9°C | 1°C

S 11 km/h

partly cloudy and no rain

hourly forecast

Sun   Nov 24

16°C | 4°C

SE 22 km/h

partly cloudy and no rain

hourly forecast

Mon   Nov 25

14°C | 1°C

NW 25 km/h

1.4 mm

broken clouds and chance of slight rain

hourly forecast

5-Day Forecast 10-Day Forecast