 The annual mean temperature is about 10 °C (50 °F) with seasonal and diurnal variations, but due to the modifying effect of the sea, the range is less than in most other parts of the United Kingdom.January is the coldest month with mean minimum temperatures between 1 °C (34°F) and 2 °C (36 °F).July and August are the warmest months in the region with mean daily maxima around 21 °C (70 °F).