The temperatures in St Helens in August are comfortable with low of 13°C and and high up to 21°C.
You can expect about 3 to 8 days of rain in St Helens 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 Helens in August 2025.
If you’re planning to visit St Helens in the near future, we highly recommend that you review the 14 day weather forecast for St Helens before you arrive.
Temperatures
21° / 13°
Rainy Days
6
Snowy Days
0
Dry Days
25
Rainfall
84
mm
Sun Hours
8.7
Hrs
