The temperatures in St Austell in August are comfortable with low of 15°C and and high up to 18°C.
You can expect about 3 to 8 days of rain in St Austell during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in St Austell in August 2025.
If you’re planning to visit St Austell in the near future, we highly recommend that you review the 14 day weather forecast for St Austell before you arrive.
Temperatures
18° / 15°
Rainy Days
7
Snowy Days
0
Dry Days
24
Rainfall
119
mm
Sun Hours
8.9
Hrs