July is the hottest month in Great Grimsby with an average temperature of 17°C (61°F) and the coldest is January at 4°C (39°F) with the most daily sunshine hours at 6 in August. The wettest month is June with an average of 45mm of rain. The best month to swim in the sea is in August when the average sea temperature is 17°C (61°F).
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Sunrise 07:41
Sunset 15:52
Sunrise 07:41
Sunset 15:52