The temperatures in Grimsby in August are usually low and can range between 14°C and 20°C.
You can expect about 3 to 8 days of rain in Grimsby 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 Grimsby in August 2025.
If you’re planning to visit Grimsby in the near future, we highly recommend that you review the 14 day weather forecast for Grimsby before you arrive.
Temperatures
20° / 14°
Rainy Days
5
Snowy Days
0
Dry Days
26
Rainfall
79
mm
Sun Hours
8.8
Hrs
