The Copley climate.
Copley is known for its bracing and breezy weather. Along with the rest of the UK, it has a changeable maritime climate with cool summers (14°C July mean) and relatively mild winters (2°C January mean). Annual temperatures usually range from a high of 27°C to a low of -14°C. Rain (820mm annually) falls on 201 days and in all seasons with a slight peak in late autumn and a dry period in spring. There are some subtle local variations, however. Because of its height above sea level, around the 1,000ft contour, and position in the NE Pennines, Copley is often one of the coldest places in England with high incidences of ground frost (151 nights annually) and snowfalls (66cm on 53 days). Copley's situation in north-east England also places it in a relatively dry, clear and sunny (1480hr on 313 days) rain-shadow area in the shelter of the higher Pennines to the west. However, the higher Pennines can also create a local strong and gusty effect if the wind blows from the west-south-west. This is the Pennine Lee Wave and can appear suddenly and disappear just as quickly. Winds from the east tend to bring misty, rainy weather with winter snow. During the short summer nights silvery-blue noctilucent clouds can be seen occasionally in the northern skies reflecting sunlight long after sunset. They are the highest clouds known, often 50 miles up. During the long dark winter nights the Aurora Borealis (Northern Lights) can also be seen in the northern sky.
Copley Climatological Station, altitude 253metres(830feet) Met Office manned observing site.
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