Cornwall Weather in August

August in Cornwall typically sees daytime highs of 26°C (79°F) and nighttime lows of 15°C (59°F). Rainfall is also possible this month, so it's worth packing an umbrella. It falls within the summer season.

Rainfall in Cornwall in August

Typically, about 12 days will experience rainfall, with an average of 92 mm (3.6 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Cornwall in August

The excellent temperature in Cornwall in August makes it a solid month to visit, with 26°C (79°F) during the day and 15°C (59°F) at night. The month of August belongs to the summer season. This kind of day-to-night contrast is typical for this time of year. With lows of 15°C (59°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

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