My guess
january: wet 1st half, drier 2nd half, maybe a cold spell on 25th jan.
february: at times mild, at times cooler then average but not excessively cold. Maybe some snow esp. in northern UK
march: cold. Not that cold like 2013 but another very cold march. 3-4th week will be wet with temperatures around average
april: cold and wet. much snow in northern regions
may: Extremely wet (maybe recordbreaking) and very cold. No sign of summer this month.
June: say hi to european monsoon. In SE-UK some short-during episodes of hot weather followed by thunderstorms. Month will be near average for SE. cooler then average in northern and west UK.
July: Temperatures below average in north central west and east UK. Only the SE (SE of London) will experience some warmer episodes, but short-during and followed a day later with thunderstorms. This isn't the summer we want. And i forgot to mention, it will be a wet month.
August: In the beginning of august a hot week, but followed by some wet and cool episodes. Temperatures around average, rainfall above average.
September: warm and dry. Best month for summerlovers.
October: very warm and very dry: 2nd best month for summerlovers./
November: dry start, wet end. Temperatures around or below average. Winter will start in the last week of nov.
December: Cold and wet. Snowrich month.
2016 will be wettest year ever recorded BY FAR, and i believe it will be a colder then average year. I expect the wettest spring and summer ever recorded. A cold spring and cool summer. Only autum will be drier en warmer then average.