Alton Weather in August

In Alton, August brings pleasant daytime temperatures around 21°C (70°F), with nights cooling to 12°C (54°F). Expect quite a bit of rainfall this month.

Rainfall in Alton in August

You can typically expect 15 days of rain this month, averaging around 78 mm (3.1 in). Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.

Temperature in Alton in August

If you're visiting Alton in August, expect excellent temperatures with highs of 21°C (70°F) and overnight lows of 12°C (54°F). August marks the summer season. Conditions are often most pleasant around the middle of the day. With overnight lows of 12°C (54°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Alton in August

The city usually sees around 171 hours of sunlight, indicating a moderately sunny period.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. July and August typically offer the best weather for Alton.